From 99bcf217183e02ebae46373896fba7f12d588001 Mon Sep 17 00:00:00 2001 From: Joe Perches Date: Sun, 27 Jun 2010 01:02:34 +0000 Subject: device.h drivers/base/core.c Convert dev_ logging macros to functions Reduces an x86 defconfig text and data ~55k, .6% smaller. $ size vmlinux* text data bss dec hex filename 7205273 716016 1366288 9287577 8db799 vmlinux 7258890 719768 1366288 9344946 8e97b2 vmlinux.master Uses %pV and struct va_format Format arguments are verified before printk The dev_info macro is converted to _dev_info because there are existing uses of variables named dev_info in the kernel tree like drivers/net/pcmcia/pcnet_cs.c A dev_info macro is created to call _dev_info Signed-off-by: Joe Perches Acked-by: Greg Kroah-Hartman Signed-off-by: David S. Miller --- drivers/base/core.c | 64 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 64 insertions(+) (limited to 'drivers/base') diff --git a/drivers/base/core.c b/drivers/base/core.c index 9630fbdf4e6c..38bbbd029306 100644 --- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -1819,3 +1819,67 @@ void device_shutdown(void) spin_unlock(&devices_kset->list_lock); async_synchronize_full(); } + +/* + * Device logging functions + */ + +#ifdef CONFIG_PRINTK + +static int __dev_printk(const char *level, const struct device *dev, + struct va_format *vaf) +{ + if (!dev) + return printk("%s(NULL device *): %pV", level, vaf); + + return printk("%s%s %s: %pV", + level, dev_driver_string(dev), dev_name(dev), vaf); +} + +int dev_printk(const char *level, const struct device *dev, + const char *fmt, ...) +{ + struct va_format vaf; + va_list args; + int r; + + va_start(args, fmt); + + vaf.fmt = fmt; + vaf.va = &args; + + r = __dev_printk(level, dev, &vaf); + va_end(args); + + return r; +} +EXPORT_SYMBOL(dev_printk); + +#define define_dev_printk_level(func, kern_level) \ +int func(const struct device *dev, const char *fmt, ...) \ +{ \ + struct va_format vaf; \ + va_list args; \ + int r; \ + \ + va_start(args, fmt); \ + \ + vaf.fmt = fmt; \ + vaf.va = &args; \ + \ + r = __dev_printk(kern_level, dev, &vaf); \ + va_end(args); \ + \ + return r; \ +} \ +EXPORT_SYMBOL(func); + +define_dev_printk_level(dev_emerg, KERN_EMERG); +define_dev_printk_level(dev_alert, KERN_ALERT); +define_dev_printk_level(dev_crit, KERN_CRIT); +define_dev_printk_level(dev_err, KERN_ERR); +define_dev_printk_level(dev_warn, KERN_WARNING); +define_dev_printk_level(dev_notice, KERN_NOTICE); +define_dev_printk_level(_dev_info, KERN_INFO); + +#endif -- cgit v1.2.3 From c125e96f044427f38d106fab7bc5e4a5e6a18262 Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Mon, 5 Jul 2010 22:43:53 +0200 Subject: PM: Make it possible to avoid races between wakeup and system sleep One of the arguments during the suspend blockers discussion was that the mainline kernel didn't contain any mechanisms making it possible to avoid races between wakeup and system suspend. Generally, there are two problems in that area. First, if a wakeup event occurs exactly when /sys/power/state is being written to, it may be delivered to user space right before the freezer kicks in, so the user space consumer of the event may not be able to process it before the system is suspended. Second, if a wakeup event occurs after user space has been frozen, it is not generally guaranteed that the ongoing transition of the system into a sleep state will be aborted. To address these issues introduce a new global sysfs attribute, /sys/power/wakeup_count, associated with a running counter of wakeup events and three helper functions, pm_stay_awake(), pm_relax(), and pm_wakeup_event(), that may be used by kernel subsystems to control the behavior of this attribute and to request the PM core to abort system transitions into a sleep state already in progress. The /sys/power/wakeup_count file may be read from or written to by user space. Reads will always succeed (unless interrupted by a signal) and return the current value of the wakeup events counter. Writes, however, will only succeed if the written number is equal to the current value of the wakeup events counter. If a write is successful, it will cause the kernel to save the current value of the wakeup events counter and to abort the subsequent system transition into a sleep state if any wakeup events are reported after the write has returned. [The assumption is that before writing to /sys/power/state user space will first read from /sys/power/wakeup_count. Next, user space consumers of wakeup events will have a chance to acknowledge or veto the upcoming system transition to a sleep state. Finally, if the transition is allowed to proceed, /sys/power/wakeup_count will be written to and if that succeeds, /sys/power/state will be written to as well. Still, if any wakeup events are reported to the PM core by kernel subsystems after that point, the transition will be aborted.] Additionally, put a wakeup events counter into struct dev_pm_info and make these per-device wakeup event counters available via sysfs, so that it's possible to check the activity of various wakeup event sources within the kernel. To illustrate how subsystems can use pm_wakeup_event(), make the low-level PCI runtime PM wakeup-handling code use it. Signed-off-by: Rafael J. Wysocki Acked-by: Jesse Barnes Acked-by: Greg Kroah-Hartman Acked-by: markgross Reviewed-by: Alan Stern --- Documentation/ABI/testing/sysfs-power | 15 +++ drivers/base/power/Makefile | 2 +- drivers/base/power/main.c | 1 + drivers/base/power/sysfs.c | 15 +++ drivers/base/power/wakeup.c | 229 ++++++++++++++++++++++++++++++++++ drivers/pci/pci-acpi.c | 1 + drivers/pci/pci.c | 20 ++- drivers/pci/pci.h | 1 + drivers/pci/pcie/pme/pcie_pme.c | 5 +- include/linux/pm.h | 10 ++ include/linux/suspend.h | 7 ++ kernel/power/hibernate.c | 20 ++- kernel/power/main.c | 55 ++++++++ kernel/power/suspend.c | 4 +- 14 files changed, 375 insertions(+), 10 deletions(-) create mode 100644 drivers/base/power/wakeup.c (limited to 'drivers/base') diff --git a/Documentation/ABI/testing/sysfs-power b/Documentation/ABI/testing/sysfs-power index d6a801f45b48..2875f1f74a07 100644 --- a/Documentation/ABI/testing/sysfs-power +++ b/Documentation/ABI/testing/sysfs-power @@ -114,3 +114,18 @@ Description: if this file contains "1", which is the default. It may be disabled by writing "0" to this file, in which case all devices will be suspended and resumed synchronously. + +What: /sys/power/wakeup_count +Date: July 2010 +Contact: Rafael J. Wysocki +Description: + The /sys/power/wakeup_count file allows user space to put the + system into a sleep state while taking into account the + concurrent arrival of wakeup events. Reading from it returns + the current number of registered wakeup events and it blocks if + some wakeup events are being processed at the time the file is + read from. Writing to it will only succeed if the current + number of wakeup events is equal to the written value and, if + successful, will make the kernel abort a subsequent transition + to a sleep state if any wakeup events are reported after the + write has returned. diff --git a/drivers/base/power/Makefile b/drivers/base/power/Makefile index 89de75325cea..cbccf9a3cee4 100644 --- a/drivers/base/power/Makefile +++ b/drivers/base/power/Makefile @@ -1,5 +1,5 @@ obj-$(CONFIG_PM) += sysfs.o -obj-$(CONFIG_PM_SLEEP) += main.o +obj-$(CONFIG_PM_SLEEP) += main.o wakeup.o obj-$(CONFIG_PM_RUNTIME) += runtime.o obj-$(CONFIG_PM_OPS) += generic_ops.o obj-$(CONFIG_PM_TRACE_RTC) += trace.o diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c index 941fcb87e52a..5419a49ff135 100644 --- a/drivers/base/power/main.c +++ b/drivers/base/power/main.c @@ -59,6 +59,7 @@ void device_pm_init(struct device *dev) { dev->power.status = DPM_ON; init_completion(&dev->power.completion); + dev->power.wakeup_count = 0; pm_runtime_init(dev); } diff --git a/drivers/base/power/sysfs.c b/drivers/base/power/sysfs.c index a4c33bc51257..81d344e0e95d 100644 --- a/drivers/base/power/sysfs.c +++ b/drivers/base/power/sysfs.c @@ -73,6 +73,8 @@ * device are known to the PM core. However, for some devices this * attribute is set to "enabled" by bus type code or device drivers and in * that cases it should be safe to leave the default value. + * + * wakeup_count - Report the number of wakeup events related to the device */ static const char enabled[] = "enabled"; @@ -144,6 +146,16 @@ wake_store(struct device * dev, struct device_attribute *attr, static DEVICE_ATTR(wakeup, 0644, wake_show, wake_store); +#ifdef CONFIG_PM_SLEEP +static ssize_t wakeup_count_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return sprintf(buf, "%lu\n", dev->power.wakeup_count); +} + +static DEVICE_ATTR(wakeup_count, 0444, wakeup_count_show, NULL); +#endif + #ifdef CONFIG_PM_ADVANCED_DEBUG #ifdef CONFIG_PM_RUNTIME @@ -230,6 +242,9 @@ static struct attribute * power_attrs[] = { &dev_attr_control.attr, #endif &dev_attr_wakeup.attr, +#ifdef CONFIG_PM_SLEEP + &dev_attr_wakeup_count.attr, +#endif #ifdef CONFIG_PM_ADVANCED_DEBUG &dev_attr_async.attr, #ifdef CONFIG_PM_RUNTIME diff --git a/drivers/base/power/wakeup.c b/drivers/base/power/wakeup.c new file mode 100644 index 000000000000..25599077c39c --- /dev/null +++ b/drivers/base/power/wakeup.c @@ -0,0 +1,229 @@ +/* + * drivers/base/power/wakeup.c - System wakeup events framework + * + * Copyright (c) 2010 Rafael J. Wysocki , Novell Inc. + * + * This file is released under the GPLv2. + */ + +#include +#include +#include +#include +#include +#include + +/* + * If set, the suspend/hibernate code will abort transitions to a sleep state + * if wakeup events are registered during or immediately before the transition. + */ +bool events_check_enabled; + +/* The counter of registered wakeup events. */ +static unsigned long event_count; +/* A preserved old value of event_count. */ +static unsigned long saved_event_count; +/* The counter of wakeup events being processed. */ +static unsigned long events_in_progress; + +static DEFINE_SPINLOCK(events_lock); + +/* + * The functions below use the observation that each wakeup event starts a + * period in which the system should not be suspended. The moment this period + * will end depends on how the wakeup event is going to be processed after being + * detected and all of the possible cases can be divided into two distinct + * groups. + * + * First, a wakeup event may be detected by the same functional unit that will + * carry out the entire processing of it and possibly will pass it to user space + * for further processing. In that case the functional unit that has detected + * the event may later "close" the "no suspend" period associated with it + * directly as soon as it has been dealt with. The pair of pm_stay_awake() and + * pm_relax(), balanced with each other, is supposed to be used in such + * situations. + * + * Second, a wakeup event may be detected by one functional unit and processed + * by another one. In that case the unit that has detected it cannot really + * "close" the "no suspend" period associated with it, unless it knows in + * advance what's going to happen to the event during processing. This + * knowledge, however, may not be available to it, so it can simply specify time + * to wait before the system can be suspended and pass it as the second + * argument of pm_wakeup_event(). + */ + +/** + * pm_stay_awake - Notify the PM core that a wakeup event is being processed. + * @dev: Device the wakeup event is related to. + * + * Notify the PM core of a wakeup event (signaled by @dev) by incrementing the + * counter of wakeup events being processed. If @dev is not NULL, the counter + * of wakeup events related to @dev is incremented too. + * + * Call this function after detecting of a wakeup event if pm_relax() is going + * to be called directly after processing the event (and possibly passing it to + * user space for further processing). + * + * It is safe to call this function from interrupt context. + */ +void pm_stay_awake(struct device *dev) +{ + unsigned long flags; + + spin_lock_irqsave(&events_lock, flags); + if (dev) + dev->power.wakeup_count++; + + events_in_progress++; + spin_unlock_irqrestore(&events_lock, flags); +} + +/** + * pm_relax - Notify the PM core that processing of a wakeup event has ended. + * + * Notify the PM core that a wakeup event has been processed by decrementing + * the counter of wakeup events being processed and incrementing the counter + * of registered wakeup events. + * + * Call this function for wakeup events whose processing started with calling + * pm_stay_awake(). + * + * It is safe to call it from interrupt context. + */ +void pm_relax(void) +{ + unsigned long flags; + + spin_lock_irqsave(&events_lock, flags); + if (events_in_progress) { + events_in_progress--; + event_count++; + } + spin_unlock_irqrestore(&events_lock, flags); +} + +/** + * pm_wakeup_work_fn - Deferred closing of a wakeup event. + * + * Execute pm_relax() for a wakeup event detected in the past and free the + * work item object used for queuing up the work. + */ +static void pm_wakeup_work_fn(struct work_struct *work) +{ + struct delayed_work *dwork = to_delayed_work(work); + + pm_relax(); + kfree(dwork); +} + +/** + * pm_wakeup_event - Notify the PM core of a wakeup event. + * @dev: Device the wakeup event is related to. + * @msec: Anticipated event processing time (in milliseconds). + * + * Notify the PM core of a wakeup event (signaled by @dev) that will take + * approximately @msec milliseconds to be processed by the kernel. Increment + * the counter of wakeup events being processed and queue up a work item + * that will execute pm_relax() for the event after @msec milliseconds. If @dev + * is not NULL, the counter of wakeup events related to @dev is incremented too. + * + * It is safe to call this function from interrupt context. + */ +void pm_wakeup_event(struct device *dev, unsigned int msec) +{ + unsigned long flags; + struct delayed_work *dwork; + + dwork = msec ? kzalloc(sizeof(*dwork), GFP_ATOMIC) : NULL; + + spin_lock_irqsave(&events_lock, flags); + if (dev) + dev->power.wakeup_count++; + + if (dwork) { + INIT_DELAYED_WORK(dwork, pm_wakeup_work_fn); + schedule_delayed_work(dwork, msecs_to_jiffies(msec)); + + events_in_progress++; + } else { + event_count++; + } + spin_unlock_irqrestore(&events_lock, flags); +} + +/** + * pm_check_wakeup_events - Check for new wakeup events. + * + * Compare the current number of registered wakeup events with its preserved + * value from the past to check if new wakeup events have been registered since + * the old value was stored. Check if the current number of wakeup events being + * processed is zero. + */ +bool pm_check_wakeup_events(void) +{ + unsigned long flags; + bool ret = true; + + spin_lock_irqsave(&events_lock, flags); + if (events_check_enabled) { + ret = (event_count == saved_event_count) && !events_in_progress; + events_check_enabled = ret; + } + spin_unlock_irqrestore(&events_lock, flags); + return ret; +} + +/** + * pm_get_wakeup_count - Read the number of registered wakeup events. + * @count: Address to store the value at. + * + * Store the number of registered wakeup events at the address in @count. Block + * if the current number of wakeup events being processed is nonzero. + * + * Return false if the wait for the number of wakeup events being processed to + * drop down to zero has been interrupted by a signal (and the current number + * of wakeup events being processed is still nonzero). Otherwise return true. + */ +bool pm_get_wakeup_count(unsigned long *count) +{ + bool ret; + + spin_lock_irq(&events_lock); + if (capable(CAP_SYS_ADMIN)) + events_check_enabled = false; + + while (events_in_progress && !signal_pending(current)) { + spin_unlock_irq(&events_lock); + + schedule_timeout_interruptible(msecs_to_jiffies(100)); + + spin_lock_irq(&events_lock); + } + *count = event_count; + ret = !events_in_progress; + spin_unlock_irq(&events_lock); + return ret; +} + +/** + * pm_save_wakeup_count - Save the current number of registered wakeup events. + * @count: Value to compare with the current number of registered wakeup events. + * + * If @count is equal to the current number of registered wakeup events and the + * current number of wakeup events being processed is zero, store @count as the + * old number of registered wakeup events to be used by pm_check_wakeup_events() + * and return true. Otherwise return false. + */ +bool pm_save_wakeup_count(unsigned long count) +{ + bool ret = false; + + spin_lock_irq(&events_lock); + if (count == event_count && !events_in_progress) { + saved_event_count = count; + events_check_enabled = true; + ret = true; + } + spin_unlock_irq(&events_lock); + return ret; +} diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c index 2e7a3bf13824..1ab98bbe58dd 100644 --- a/drivers/pci/pci-acpi.c +++ b/drivers/pci/pci-acpi.c @@ -48,6 +48,7 @@ static void pci_acpi_wake_dev(acpi_handle handle, u32 event, void *context) if (event == ACPI_NOTIFY_DEVICE_WAKE && pci_dev) { pci_check_pme_status(pci_dev); pm_runtime_resume(&pci_dev->dev); + pci_wakeup_event(pci_dev); if (pci_dev->subordinate) pci_pme_wakeup_bus(pci_dev->subordinate); } diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 740fb4ea9669..130ed1daf0f8 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -1275,6 +1275,22 @@ bool pci_check_pme_status(struct pci_dev *dev) return ret; } +/* + * Time to wait before the system can be put into a sleep state after reporting + * a wakeup event signaled by a PCI device. + */ +#define PCI_WAKEUP_COOLDOWN 100 + +/** + * pci_wakeup_event - Report a wakeup event related to a given PCI device. + * @dev: Device to report the wakeup event for. + */ +void pci_wakeup_event(struct pci_dev *dev) +{ + if (device_may_wakeup(&dev->dev)) + pm_wakeup_event(&dev->dev, PCI_WAKEUP_COOLDOWN); +} + /** * pci_pme_wakeup - Wake up a PCI device if its PME Status bit is set. * @dev: Device to handle. @@ -1285,8 +1301,10 @@ bool pci_check_pme_status(struct pci_dev *dev) */ static int pci_pme_wakeup(struct pci_dev *dev, void *ign) { - if (pci_check_pme_status(dev)) + if (pci_check_pme_status(dev)) { pm_request_resume(&dev->dev); + pci_wakeup_event(dev); + } return 0; } diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h index f8077b3c8c8c..c8b7fd056ccd 100644 --- a/drivers/pci/pci.h +++ b/drivers/pci/pci.h @@ -56,6 +56,7 @@ extern void pci_update_current_state(struct pci_dev *dev, pci_power_t state); extern void pci_disable_enabled_device(struct pci_dev *dev); extern bool pci_check_pme_status(struct pci_dev *dev); extern int pci_finish_runtime_suspend(struct pci_dev *dev); +extern void pci_wakeup_event(struct pci_dev *dev); extern int __pci_pme_wakeup(struct pci_dev *dev, void *ign); extern void pci_pme_wakeup_bus(struct pci_bus *bus); extern void pci_pm_init(struct pci_dev *dev); diff --git a/drivers/pci/pcie/pme/pcie_pme.c b/drivers/pci/pcie/pme/pcie_pme.c index d672a0a63816..bbdea18693d9 100644 --- a/drivers/pci/pcie/pme/pcie_pme.c +++ b/drivers/pci/pcie/pme/pcie_pme.c @@ -154,6 +154,7 @@ static bool pcie_pme_walk_bus(struct pci_bus *bus) /* Skip PCIe devices in case we started from a root port. */ if (!pci_is_pcie(dev) && pci_check_pme_status(dev)) { pm_request_resume(&dev->dev); + pci_wakeup_event(dev); ret = true; } @@ -254,8 +255,10 @@ static void pcie_pme_handle_request(struct pci_dev *port, u16 req_id) if (found) { /* The device is there, but we have to check its PME status. */ found = pci_check_pme_status(dev); - if (found) + if (found) { pm_request_resume(&dev->dev); + pci_wakeup_event(dev); + } pci_dev_put(dev); } else if (devfn) { /* diff --git a/include/linux/pm.h b/include/linux/pm.h index 8e258c727971..b417fc46f3fc 100644 --- a/include/linux/pm.h +++ b/include/linux/pm.h @@ -457,6 +457,7 @@ struct dev_pm_info { #ifdef CONFIG_PM_SLEEP struct list_head entry; struct completion completion; + unsigned long wakeup_count; #endif #ifdef CONFIG_PM_RUNTIME struct timer_list suspend_timer; @@ -552,6 +553,11 @@ extern void __suspend_report_result(const char *function, void *fn, int ret); } while (0) extern void device_pm_wait_for_dev(struct device *sub, struct device *dev); + +/* drivers/base/power/wakeup.c */ +extern void pm_wakeup_event(struct device *dev, unsigned int msec); +extern void pm_stay_awake(struct device *dev); +extern void pm_relax(void); #else /* !CONFIG_PM_SLEEP */ #define device_pm_lock() do {} while (0) @@ -565,6 +571,10 @@ static inline int dpm_suspend_start(pm_message_t state) #define suspend_report_result(fn, ret) do {} while (0) static inline void device_pm_wait_for_dev(struct device *a, struct device *b) {} + +static inline void pm_wakeup_event(struct device *dev, unsigned int msec) {} +static inline void pm_stay_awake(struct device *dev) {} +static inline void pm_relax(void) {} #endif /* !CONFIG_PM_SLEEP */ /* How to reorder dpm_list after device_move() */ diff --git a/include/linux/suspend.h b/include/linux/suspend.h index bc7d6bb4cd8e..bf1bab7b059c 100644 --- a/include/linux/suspend.h +++ b/include/linux/suspend.h @@ -286,6 +286,13 @@ extern int unregister_pm_notifier(struct notifier_block *nb); { .notifier_call = fn, .priority = pri }; \ register_pm_notifier(&fn##_nb); \ } + +/* drivers/base/power/wakeup.c */ +extern bool events_check_enabled; + +extern bool pm_check_wakeup_events(void); +extern bool pm_get_wakeup_count(unsigned long *count); +extern bool pm_save_wakeup_count(unsigned long count); #else /* !CONFIG_PM_SLEEP */ static inline int register_pm_notifier(struct notifier_block *nb) diff --git a/kernel/power/hibernate.c b/kernel/power/hibernate.c index aa9e916da4d5..f61202916631 100644 --- a/kernel/power/hibernate.c +++ b/kernel/power/hibernate.c @@ -277,7 +277,7 @@ static int create_image(int platform_mode) goto Enable_irqs; } - if (hibernation_test(TEST_CORE)) + if (hibernation_test(TEST_CORE) || !pm_check_wakeup_events()) goto Power_up; in_suspend = 1; @@ -288,8 +288,10 @@ static int create_image(int platform_mode) error); /* Restore control flow magically appears here */ restore_processor_state(); - if (!in_suspend) + if (!in_suspend) { + events_check_enabled = false; platform_leave(platform_mode); + } Power_up: sysdev_resume(); @@ -511,14 +513,20 @@ int hibernation_platform_enter(void) local_irq_disable(); sysdev_suspend(PMSG_HIBERNATE); + if (!pm_check_wakeup_events()) { + error = -EAGAIN; + goto Power_up; + } + hibernation_ops->enter(); /* We should never get here */ while (1); - /* - * We don't need to reenable the nonboot CPUs or resume consoles, since - * the system is going to be halted anyway. - */ + Power_up: + sysdev_resume(); + local_irq_enable(); + enable_nonboot_cpus(); + Platform_finish: hibernation_ops->finish(); diff --git a/kernel/power/main.c b/kernel/power/main.c index b58800b21fc0..62b0bc6e4983 100644 --- a/kernel/power/main.c +++ b/kernel/power/main.c @@ -204,6 +204,60 @@ static ssize_t state_store(struct kobject *kobj, struct kobj_attribute *attr, power_attr(state); +#ifdef CONFIG_PM_SLEEP +/* + * The 'wakeup_count' attribute, along with the functions defined in + * drivers/base/power/wakeup.c, provides a means by which wakeup events can be + * handled in a non-racy way. + * + * If a wakeup event occurs when the system is in a sleep state, it simply is + * woken up. In turn, if an event that would wake the system up from a sleep + * state occurs when it is undergoing a transition to that sleep state, the + * transition should be aborted. Moreover, if such an event occurs when the + * system is in the working state, an attempt to start a transition to the + * given sleep state should fail during certain period after the detection of + * the event. Using the 'state' attribute alone is not sufficient to satisfy + * these requirements, because a wakeup event may occur exactly when 'state' + * is being written to and may be delivered to user space right before it is + * frozen, so the event will remain only partially processed until the system is + * woken up by another event. In particular, it won't cause the transition to + * a sleep state to be aborted. + * + * This difficulty may be overcome if user space uses 'wakeup_count' before + * writing to 'state'. It first should read from 'wakeup_count' and store + * the read value. Then, after carrying out its own preparations for the system + * transition to a sleep state, it should write the stored value to + * 'wakeup_count'. If that fails, at least one wakeup event has occured since + * 'wakeup_count' was read and 'state' should not be written to. Otherwise, it + * is allowed to write to 'state', but the transition will be aborted if there + * are any wakeup events detected after 'wakeup_count' was written to. + */ + +static ssize_t wakeup_count_show(struct kobject *kobj, + struct kobj_attribute *attr, + char *buf) +{ + unsigned long val; + + return pm_get_wakeup_count(&val) ? sprintf(buf, "%lu\n", val) : -EINTR; +} + +static ssize_t wakeup_count_store(struct kobject *kobj, + struct kobj_attribute *attr, + const char *buf, size_t n) +{ + unsigned long val; + + if (sscanf(buf, "%lu", &val) == 1) { + if (pm_save_wakeup_count(val)) + return n; + } + return -EINVAL; +} + +power_attr(wakeup_count); +#endif /* CONFIG_PM_SLEEP */ + #ifdef CONFIG_PM_TRACE int pm_trace_enabled; @@ -236,6 +290,7 @@ static struct attribute * g[] = { #endif #ifdef CONFIG_PM_SLEEP &pm_async_attr.attr, + &wakeup_count_attr.attr, #ifdef CONFIG_PM_DEBUG &pm_test_attr.attr, #endif diff --git a/kernel/power/suspend.c b/kernel/power/suspend.c index f37cb7dd4402..5f8d09f94325 100644 --- a/kernel/power/suspend.c +++ b/kernel/power/suspend.c @@ -163,8 +163,10 @@ static int suspend_enter(suspend_state_t state) error = sysdev_suspend(PMSG_SUSPEND); if (!error) { - if (!suspend_test(TEST_CORE)) + if (!suspend_test(TEST_CORE) && pm_check_wakeup_events()) { error = suspend_ops->enter(state); + events_check_enabled = false; + } sysdev_resume(); } -- cgit v1.2.3 From 4eb241e5691363c391aac8a5051d0d013188ec84 Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Wed, 7 Jul 2010 23:43:51 +0200 Subject: PM: Do not use dynamically allocated objects in pm_wakeup_event() Originally, pm_wakeup_event() uses struct delayed_work objects, allocated with GFP_ATOMIC, to schedule the execution of pm_relax() in future. However, as noted by Alan Stern, it is not necessary to do that, because all pm_wakeup_event() calls can use one static timer that will always be set to expire at the latest time passed to pm_wakeup_event(). The modifications are based on the example code posted by Alan. Signed-off-by: Rafael J. Wysocki --- drivers/base/power/wakeup.c | 56 ++++++++++++++++++++++++++++++--------------- 1 file changed, 37 insertions(+), 19 deletions(-) (limited to 'drivers/base') diff --git a/drivers/base/power/wakeup.c b/drivers/base/power/wakeup.c index 25599077c39c..eb594facfc3f 100644 --- a/drivers/base/power/wakeup.c +++ b/drivers/base/power/wakeup.c @@ -28,6 +28,11 @@ static unsigned long events_in_progress; static DEFINE_SPINLOCK(events_lock); +static void pm_wakeup_timer_fn(unsigned long data); + +static DEFINE_TIMER(events_timer, pm_wakeup_timer_fn, 0, 0); +static unsigned long events_timer_expires; + /* * The functions below use the observation that each wakeup event starts a * period in which the system should not be suspended. The moment this period @@ -103,17 +108,22 @@ void pm_relax(void) } /** - * pm_wakeup_work_fn - Deferred closing of a wakeup event. + * pm_wakeup_timer_fn - Delayed finalization of a wakeup event. * - * Execute pm_relax() for a wakeup event detected in the past and free the - * work item object used for queuing up the work. + * Decrease the counter of wakeup events being processed after it was increased + * by pm_wakeup_event(). */ -static void pm_wakeup_work_fn(struct work_struct *work) +static void pm_wakeup_timer_fn(unsigned long data) { - struct delayed_work *dwork = to_delayed_work(work); + unsigned long flags; - pm_relax(); - kfree(dwork); + spin_lock_irqsave(&events_lock, flags); + if (events_timer_expires + && time_before_eq(events_timer_expires, jiffies)) { + events_in_progress--; + events_timer_expires = 0; + } + spin_unlock_irqrestore(&events_lock, flags); } /** @@ -123,30 +133,38 @@ static void pm_wakeup_work_fn(struct work_struct *work) * * Notify the PM core of a wakeup event (signaled by @dev) that will take * approximately @msec milliseconds to be processed by the kernel. Increment - * the counter of wakeup events being processed and queue up a work item - * that will execute pm_relax() for the event after @msec milliseconds. If @dev - * is not NULL, the counter of wakeup events related to @dev is incremented too. + * the counter of registered wakeup events and (if @msec is nonzero) set up + * the wakeup events timer to execute pm_wakeup_timer_fn() in future (if the + * timer has not been set up already, increment the counter of wakeup events + * being processed). If @dev is not NULL, the counter of wakeup events related + * to @dev is incremented too. * * It is safe to call this function from interrupt context. */ void pm_wakeup_event(struct device *dev, unsigned int msec) { unsigned long flags; - struct delayed_work *dwork; - - dwork = msec ? kzalloc(sizeof(*dwork), GFP_ATOMIC) : NULL; spin_lock_irqsave(&events_lock, flags); + event_count++; if (dev) dev->power.wakeup_count++; - if (dwork) { - INIT_DELAYED_WORK(dwork, pm_wakeup_work_fn); - schedule_delayed_work(dwork, msecs_to_jiffies(msec)); + if (msec) { + unsigned long expires; - events_in_progress++; - } else { - event_count++; + expires = jiffies + msecs_to_jiffies(msec); + if (!expires) + expires = 1; + + if (!events_timer_expires + || time_after(expires, events_timer_expires)) { + if (!events_timer_expires) + events_in_progress++; + + mod_timer(&events_timer, expires); + events_timer_expires = expires; + } } spin_unlock_irqrestore(&events_lock, flags); } -- cgit v1.2.3 From 0fcb4eef8294492c8f1de8236b1ed81f09e42922 Mon Sep 17 00:00:00 2001 From: Alan Stern Date: Thu, 8 Jul 2010 00:05:37 +0200 Subject: PM / Runtime: Make runtime_status attribute not debug-only (v. 2) This patch (as1404b) makes the runtime_status sysfs attribute available even in the absence of CONFIG_PM_ADVANCED_DEBUG, and it changes the routine to display "unsupported" when runtime PM is disabled for a device. Although not strictly 100% accurate, this will almost always be correct. Signed-off-by: Alan Stern Acked-by: Dominik Brodowski Signed-off-by: Rafael J. Wysocki --- drivers/base/power/sysfs.c | 53 +++++++++++++++++++++++++++++----------------- 1 file changed, 33 insertions(+), 20 deletions(-) (limited to 'drivers/base') diff --git a/drivers/base/power/sysfs.c b/drivers/base/power/sysfs.c index 81d344e0e95d..1eca50c8e7ca 100644 --- a/drivers/base/power/sysfs.c +++ b/drivers/base/power/sysfs.c @@ -110,6 +110,38 @@ static ssize_t control_store(struct device * dev, struct device_attribute *attr, } static DEVICE_ATTR(control, 0644, control_show, control_store); + +static ssize_t rtpm_status_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + const char *p; + + if (dev->power.runtime_error) { + p = "error\n"; + } else if (dev->power.disable_depth) { + p = "unsupported\n"; + } else { + switch (dev->power.runtime_status) { + case RPM_SUSPENDED: + p = "suspended\n"; + break; + case RPM_SUSPENDING: + p = "suspending\n"; + break; + case RPM_RESUMING: + p = "resuming\n"; + break; + case RPM_ACTIVE: + p = "active\n"; + break; + default: + return -EIO; + } + } + return sprintf(buf, p); +} + +static DEVICE_ATTR(runtime_status, 0444, rtpm_status_show, NULL); #endif static ssize_t @@ -184,27 +216,8 @@ static ssize_t rtpm_enabled_show(struct device *dev, return sprintf(buf, "enabled\n"); } -static ssize_t rtpm_status_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - if (dev->power.runtime_error) - return sprintf(buf, "error\n"); - switch (dev->power.runtime_status) { - case RPM_SUSPENDED: - return sprintf(buf, "suspended\n"); - case RPM_SUSPENDING: - return sprintf(buf, "suspending\n"); - case RPM_RESUMING: - return sprintf(buf, "resuming\n"); - case RPM_ACTIVE: - return sprintf(buf, "active\n"); - } - return -EIO; -} - static DEVICE_ATTR(runtime_usage, 0444, rtpm_usagecount_show, NULL); static DEVICE_ATTR(runtime_active_kids, 0444, rtpm_children_show, NULL); -static DEVICE_ATTR(runtime_status, 0444, rtpm_status_show, NULL); static DEVICE_ATTR(runtime_enabled, 0444, rtpm_enabled_show, NULL); #endif @@ -240,6 +253,7 @@ static DEVICE_ATTR(async, 0644, async_show, async_store); static struct attribute * power_attrs[] = { #ifdef CONFIG_PM_RUNTIME &dev_attr_control.attr, + &dev_attr_runtime_status.attr, #endif &dev_attr_wakeup.attr, #ifdef CONFIG_PM_SLEEP @@ -250,7 +264,6 @@ static struct attribute * power_attrs[] = { #ifdef CONFIG_PM_RUNTIME &dev_attr_runtime_usage.attr, &dev_attr_runtime_active_kids.attr, - &dev_attr_runtime_status.attr, &dev_attr_runtime_enabled.attr, #endif #endif -- cgit v1.2.3 From 8d4b9d1bfef117862a2889dec4dac227068544c9 Mon Sep 17 00:00:00 2001 From: Arjan van de Ven Date: Mon, 19 Jul 2010 02:01:06 +0200 Subject: PM / Runtime: Add runtime PM statistics (v3) In order for PowerTOP to be able to report how well the new runtime PM is working for the various drivers, the kernel needs to export some basic statistics in sysfs. This patch adds two sysfs files in the runtime PM domain that expose the total time a device has been active, and the time a device has been suspended. With this PowerTOP can compute the activity percentage Active %age = 100 * (delta active) / (delta active + delta suspended) and present the information to the user. I've written the PowerTOP code (slated for version 1.12) already, and the output looks like this: Runtime Device Power Management statistics Active Device name 10.0% 06:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet controller [version 2: fix stat update bugs noticed by Alan Stern] [version 3: rebase to -next and move the sysfs declaration] Signed-off-by: Arjan van de Ven Signed-off-by: Rafael J. Wysocki --- drivers/base/power/runtime.c | 54 ++++++++++++++++++++++++++++++++++++++------ drivers/base/power/sysfs.c | 30 ++++++++++++++++++++++++ include/linux/pm.h | 6 +++++ 3 files changed, 83 insertions(+), 7 deletions(-) (limited to 'drivers/base') diff --git a/drivers/base/power/runtime.c b/drivers/base/power/runtime.c index b0ec0e9f27e9..b78c401ffa73 100644 --- a/drivers/base/power/runtime.c +++ b/drivers/base/power/runtime.c @@ -123,6 +123,45 @@ int pm_runtime_idle(struct device *dev) } EXPORT_SYMBOL_GPL(pm_runtime_idle); + +/** + * update_pm_runtime_accounting - Update the time accounting of power states + * @dev: Device to update the accounting for + * + * In order to be able to have time accounting of the various power states + * (as used by programs such as PowerTOP to show the effectiveness of runtime + * PM), we need to track the time spent in each state. + * update_pm_runtime_accounting must be called each time before the + * runtime_status field is updated, to account the time in the old state + * correctly. + */ +void update_pm_runtime_accounting(struct device *dev) +{ + unsigned long now = jiffies; + int delta; + + delta = now - dev->power.accounting_timestamp; + + if (delta < 0) + delta = 0; + + dev->power.accounting_timestamp = now; + + if (dev->power.disable_depth > 0) + return; + + if (dev->power.runtime_status == RPM_SUSPENDED) + dev->power.suspended_jiffies += delta; + else + dev->power.active_jiffies += delta; +} + +static void __update_runtime_status(struct device *dev, enum rpm_status status) +{ + update_pm_runtime_accounting(dev); + dev->power.runtime_status = status; +} + /** * __pm_runtime_suspend - Carry out run-time suspend of given device. * @dev: Device to suspend. @@ -197,7 +236,7 @@ int __pm_runtime_suspend(struct device *dev, bool from_wq) goto repeat; } - dev->power.runtime_status = RPM_SUSPENDING; + __update_runtime_status(dev, RPM_SUSPENDING); dev->power.deferred_resume = false; if (dev->bus && dev->bus->pm && dev->bus->pm->runtime_suspend) { @@ -228,7 +267,7 @@ int __pm_runtime_suspend(struct device *dev, bool from_wq) } if (retval) { - dev->power.runtime_status = RPM_ACTIVE; + __update_runtime_status(dev, RPM_ACTIVE); if (retval == -EAGAIN || retval == -EBUSY) { if (dev->power.timer_expires == 0) notify = true; @@ -237,7 +276,7 @@ int __pm_runtime_suspend(struct device *dev, bool from_wq) pm_runtime_cancel_pending(dev); } } else { - dev->power.runtime_status = RPM_SUSPENDED; + __update_runtime_status(dev, RPM_SUSPENDED); pm_runtime_deactivate_timer(dev); if (dev->parent) { @@ -381,7 +420,7 @@ int __pm_runtime_resume(struct device *dev, bool from_wq) goto repeat; } - dev->power.runtime_status = RPM_RESUMING; + __update_runtime_status(dev, RPM_RESUMING); if (dev->bus && dev->bus->pm && dev->bus->pm->runtime_resume) { spin_unlock_irq(&dev->power.lock); @@ -411,10 +450,10 @@ int __pm_runtime_resume(struct device *dev, bool from_wq) } if (retval) { - dev->power.runtime_status = RPM_SUSPENDED; + __update_runtime_status(dev, RPM_SUSPENDED); pm_runtime_cancel_pending(dev); } else { - dev->power.runtime_status = RPM_ACTIVE; + __update_runtime_status(dev, RPM_ACTIVE); if (parent) atomic_inc(&parent->power.child_count); } @@ -848,7 +887,7 @@ int __pm_runtime_set_status(struct device *dev, unsigned int status) } out_set: - dev->power.runtime_status = status; + __update_runtime_status(dev, status); dev->power.runtime_error = 0; out: spin_unlock_irqrestore(&dev->power.lock, flags); @@ -1077,6 +1116,7 @@ void pm_runtime_init(struct device *dev) dev->power.request_pending = false; dev->power.request = RPM_REQ_NONE; dev->power.deferred_resume = false; + dev->power.accounting_timestamp = jiffies; INIT_WORK(&dev->power.work, pm_runtime_work); dev->power.timer_expires = 0; diff --git a/drivers/base/power/sysfs.c b/drivers/base/power/sysfs.c index 1eca50c8e7ca..e56b4388fe61 100644 --- a/drivers/base/power/sysfs.c +++ b/drivers/base/power/sysfs.c @@ -6,6 +6,7 @@ #include #include #include +#include #include "power.h" /* @@ -111,6 +112,33 @@ static ssize_t control_store(struct device * dev, struct device_attribute *attr, static DEVICE_ATTR(control, 0644, control_show, control_store); +static ssize_t rtpm_active_time_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + int ret; + spin_lock_irq(&dev->power.lock); + update_pm_runtime_accounting(dev); + ret = sprintf(buf, "%i\n", jiffies_to_msecs(dev->power.active_jiffies)); + spin_unlock_irq(&dev->power.lock); + return ret; +} + +static DEVICE_ATTR(runtime_active_time, 0444, rtpm_active_time_show, NULL); + +static ssize_t rtpm_suspended_time_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + int ret; + spin_lock_irq(&dev->power.lock); + update_pm_runtime_accounting(dev); + ret = sprintf(buf, "%i\n", + jiffies_to_msecs(dev->power.suspended_jiffies)); + spin_unlock_irq(&dev->power.lock); + return ret; +} + +static DEVICE_ATTR(runtime_suspended_time, 0444, rtpm_suspended_time_show, NULL); + static ssize_t rtpm_status_show(struct device *dev, struct device_attribute *attr, char *buf) { @@ -254,6 +282,8 @@ static struct attribute * power_attrs[] = { #ifdef CONFIG_PM_RUNTIME &dev_attr_control.attr, &dev_attr_runtime_status.attr, + &dev_attr_runtime_suspended_time.attr, + &dev_attr_runtime_active_time.attr, #endif &dev_attr_wakeup.attr, #ifdef CONFIG_PM_SLEEP diff --git a/include/linux/pm.h b/include/linux/pm.h index b417fc46f3fc..52e8c55ff314 100644 --- a/include/linux/pm.h +++ b/include/linux/pm.h @@ -477,9 +477,15 @@ struct dev_pm_info { enum rpm_request request; enum rpm_status runtime_status; int runtime_error; + unsigned long active_jiffies; + unsigned long suspended_jiffies; + unsigned long accounting_timestamp; #endif }; +extern void update_pm_runtime_accounting(struct device *dev); + + /* * The PM_EVENT_ messages are also used by drivers implementing the legacy * suspend framework, based on the ->suspend() and ->resume() callbacks common -- cgit v1.2.3 From 05212157e94ccf4cf458413bbba509cfa95ff92b Mon Sep 17 00:00:00 2001 From: Grant Likely Date: Tue, 8 Jun 2010 07:48:20 -0600 Subject: drivercore/of: Add OF style matching to platform bus As part of the merge between platform bus and of_platform bus, add the ability to do of-style matching to the platform bus. Signed-off-by: Grant Likely Acked-by: Greg Kroah-Hartman CC: Michal Simek CC: Grant Likely CC: Benjamin Herrenschmidt CC: Stephen Rothwell CC: linux-kernel@vger.kernel.org CC: microblaze-uclinux@itee.uq.edu.au CC: linuxppc-dev@ozlabs.org CC: devicetree-discuss@lists.ozlabs.org --- drivers/base/platform.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) (limited to 'drivers/base') diff --git a/drivers/base/platform.c b/drivers/base/platform.c index 4d99c8bdfedc..fac3633c7223 100644 --- a/drivers/base/platform.c +++ b/drivers/base/platform.c @@ -12,6 +12,7 @@ #include #include +#include #include #include #include @@ -673,7 +674,11 @@ static int platform_match(struct device *dev, struct device_driver *drv) struct platform_device *pdev = to_platform_device(dev); struct platform_driver *pdrv = to_platform_driver(drv); - /* match against the id table first */ + /* Attempt an OF style match first */ + if (of_driver_match_device(dev, drv)) + return 1; + + /* Then try to match against the id table */ if (pdrv->id_table) return platform_match_id(pdrv->id_table, pdev) != NULL; -- cgit v1.2.3 From eca3930163ba8884060ce9d9ff5ef0d9b7c7b00f Mon Sep 17 00:00:00 2001 From: Grant Likely Date: Tue, 8 Jun 2010 07:48:21 -0600 Subject: of: Merge of_platform_bus_type with platform_bus_type of_platform_bus was being used in the same manner as the platform_bus. The only difference being that of_platform_bus devices are generated from data in the device tree, and platform_bus devices are usually statically allocated in platform code. Having them separate causes the problem of device drivers having to be registered twice if it was possible for the same device to appear on either bus. This patch removes of_platform_bus_type and registers all of_platform bus devices and drivers on the platform bus instead. A previous patch made the of_device structure an alias for the platform_device structure, and a shim is used to adapt of_platform_drivers to the platform bus. After all of of_platform_bus drivers are converted to be normal platform drivers, the shim code can be removed. Signed-off-by: Grant Likely Acked-by: David S. Miller --- arch/microblaze/kernel/of_platform.c | 11 ------ arch/microblaze/kernel/setup.c | 6 --- arch/powerpc/kernel/dma-swiotlb.c | 8 ---- arch/powerpc/kernel/of_platform.c | 12 ------ arch/powerpc/kernel/setup-common.c | 7 ---- arch/powerpc/platforms/cell/beat_iommu.c | 2 +- arch/powerpc/platforms/cell/iommu.c | 2 +- arch/powerpc/sysdev/mv64x60_dev.c | 7 +--- arch/sparc/kernel/of_device_32.c | 21 +++------- arch/sparc/kernel/of_device_64.c | 21 +++------- arch/sparc/kernel/of_device_common.c | 3 -- drivers/base/platform.c | 6 +++ drivers/of/device.c | 5 +++ drivers/of/platform.c | 67 ++++++++++++++++++++++++++++++-- include/linux/of_device.h | 6 +++ include/linux/of_platform.h | 21 ++++------ 16 files changed, 102 insertions(+), 103 deletions(-) (limited to 'drivers/base') diff --git a/arch/microblaze/kernel/of_platform.c b/arch/microblaze/kernel/of_platform.c index da79edf45420..fb2866104331 100644 --- a/arch/microblaze/kernel/of_platform.c +++ b/arch/microblaze/kernel/of_platform.c @@ -26,17 +26,6 @@ #include #include -struct bus_type of_platform_bus_type = { - .uevent = of_device_uevent, -}; -EXPORT_SYMBOL(of_platform_bus_type); - -static int __init of_bus_driver_init(void) -{ - return of_bus_type_init(&of_platform_bus_type, "of_platform"); -} -postcore_initcall(of_bus_driver_init); - /* * The list of OF IDs below is used for matching bus types in the * system whose devices are to be exposed as of_platform_devices. diff --git a/arch/microblaze/kernel/setup.c b/arch/microblaze/kernel/setup.c index 17c98dbcec88..f5f768842354 100644 --- a/arch/microblaze/kernel/setup.c +++ b/arch/microblaze/kernel/setup.c @@ -213,15 +213,9 @@ static struct notifier_block dflt_plat_bus_notifier = { .priority = INT_MAX, }; -static struct notifier_block dflt_of_bus_notifier = { - .notifier_call = dflt_bus_notify, - .priority = INT_MAX, -}; - static int __init setup_bus_notifier(void) { bus_register_notifier(&platform_bus_type, &dflt_plat_bus_notifier); - bus_register_notifier(&of_platform_bus_type, &dflt_of_bus_notifier); return 0; } diff --git a/arch/powerpc/kernel/dma-swiotlb.c b/arch/powerpc/kernel/dma-swiotlb.c index 02f724f36753..4295e0b94b2d 100644 --- a/arch/powerpc/kernel/dma-swiotlb.c +++ b/arch/powerpc/kernel/dma-swiotlb.c @@ -82,17 +82,9 @@ static struct notifier_block ppc_swiotlb_plat_bus_notifier = { .priority = 0, }; -static struct notifier_block ppc_swiotlb_of_bus_notifier = { - .notifier_call = ppc_swiotlb_bus_notify, - .priority = 0, -}; - int __init swiotlb_setup_bus_notifier(void) { bus_register_notifier(&platform_bus_type, &ppc_swiotlb_plat_bus_notifier); - bus_register_notifier(&of_platform_bus_type, - &ppc_swiotlb_of_bus_notifier); - return 0; } diff --git a/arch/powerpc/kernel/of_platform.c b/arch/powerpc/kernel/of_platform.c index 4e0a2f7c1dd3..d3497cd81e8a 100644 --- a/arch/powerpc/kernel/of_platform.c +++ b/arch/powerpc/kernel/of_platform.c @@ -52,18 +52,6 @@ const struct of_device_id of_default_bus_ids[] = { {}, }; -struct bus_type of_platform_bus_type = { - .uevent = of_device_uevent, -}; -EXPORT_SYMBOL(of_platform_bus_type); - -static int __init of_bus_driver_init(void) -{ - return of_bus_type_init(&of_platform_bus_type, "of_platform"); -} - -postcore_initcall(of_bus_driver_init); - static int of_dev_node_match(struct device *dev, void *data) { return to_of_device(dev)->dev.of_node == data; diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c index b7e6c7e193ae..d1a5304b3ddd 100644 --- a/arch/powerpc/kernel/setup-common.c +++ b/arch/powerpc/kernel/setup-common.c @@ -701,16 +701,9 @@ static struct notifier_block ppc_dflt_plat_bus_notifier = { .priority = INT_MAX, }; -static struct notifier_block ppc_dflt_of_bus_notifier = { - .notifier_call = ppc_dflt_bus_notify, - .priority = INT_MAX, -}; - static int __init setup_bus_notifier(void) { bus_register_notifier(&platform_bus_type, &ppc_dflt_plat_bus_notifier); - bus_register_notifier(&of_platform_bus_type, &ppc_dflt_of_bus_notifier); - return 0; } diff --git a/arch/powerpc/platforms/cell/beat_iommu.c b/arch/powerpc/platforms/cell/beat_iommu.c index 39d361c5c6d2..beec405eb6f8 100644 --- a/arch/powerpc/platforms/cell/beat_iommu.c +++ b/arch/powerpc/platforms/cell/beat_iommu.c @@ -108,7 +108,7 @@ static int __init celleb_init_iommu(void) celleb_init_direct_mapping(); set_pci_dma_ops(&dma_direct_ops); ppc_md.pci_dma_dev_setup = celleb_pci_dma_dev_setup; - bus_register_notifier(&of_platform_bus_type, &celleb_of_bus_notifier); + bus_register_notifier(&platform_bus_type, &celleb_of_bus_notifier); return 0; } diff --git a/arch/powerpc/platforms/cell/iommu.c b/arch/powerpc/platforms/cell/iommu.c index 3712900471ba..58b13ce3847e 100644 --- a/arch/powerpc/platforms/cell/iommu.c +++ b/arch/powerpc/platforms/cell/iommu.c @@ -1204,7 +1204,7 @@ static int __init cell_iommu_init(void) /* Register callbacks on OF platform device addition/removal * to handle linking them to the right DMA operations */ - bus_register_notifier(&of_platform_bus_type, &cell_of_bus_notifier); + bus_register_notifier(&platform_bus_type, &cell_of_bus_notifier); return 0; } diff --git a/arch/powerpc/sysdev/mv64x60_dev.c b/arch/powerpc/sysdev/mv64x60_dev.c index 31acd3b1718b..1398bc454999 100644 --- a/arch/powerpc/sysdev/mv64x60_dev.c +++ b/arch/powerpc/sysdev/mv64x60_dev.c @@ -20,12 +20,7 @@ #include -/* - * These functions provide the necessary setup for the mv64x60 drivers. - * These drivers are unusual in that they work on both the MIPS and PowerPC - * architectures. Because of that, the drivers do not support the normal - * PowerPC of_platform_bus_type. They support platform_bus_type instead. - */ +/* These functions provide the necessary setup for the mv64x60 drivers. */ static struct of_device_id __initdata of_mv64x60_devices[] = { { .compatible = "marvell,mv64306-devctrl", }, diff --git a/arch/sparc/kernel/of_device_32.c b/arch/sparc/kernel/of_device_32.c index 331de91ad2bc..75fc9d5cd7e6 100644 --- a/arch/sparc/kernel/of_device_32.c +++ b/arch/sparc/kernel/of_device_32.c @@ -424,7 +424,7 @@ build_resources: build_device_resources(op, parent); op->dev.parent = parent; - op->dev.bus = &of_platform_bus_type; + op->dev.bus = &platform_bus_type; if (!parent) dev_set_name(&op->dev, "root"); else @@ -452,30 +452,19 @@ static void __init scan_tree(struct device_node *dp, struct device *parent) } } -static void __init scan_of_devices(void) +static int __init scan_of_devices(void) { struct device_node *root = of_find_node_by_path("/"); struct of_device *parent; parent = scan_one_device(root, NULL); if (!parent) - return; + return 0; scan_tree(root->child, &parent->dev); + return 0; } - -static int __init of_bus_driver_init(void) -{ - int err; - - err = of_bus_type_init(&of_platform_bus_type, "of"); - if (!err) - scan_of_devices(); - - return err; -} - -postcore_initcall(of_bus_driver_init); +postcore_initcall(scan_of_devices); static int __init of_debug(char *str) { diff --git a/arch/sparc/kernel/of_device_64.c b/arch/sparc/kernel/of_device_64.c index 5e8cbb942d3d..9743d1d9fa03 100644 --- a/arch/sparc/kernel/of_device_64.c +++ b/arch/sparc/kernel/of_device_64.c @@ -667,7 +667,7 @@ static struct of_device * __init scan_one_device(struct device_node *dp, op->archdata.irqs[i] = build_one_device_irq(op, parent, op->archdata.irqs[i]); op->dev.parent = parent; - op->dev.bus = &of_platform_bus_type; + op->dev.bus = &platform_bus_type; if (!parent) dev_set_name(&op->dev, "root"); else @@ -695,30 +695,19 @@ static void __init scan_tree(struct device_node *dp, struct device *parent) } } -static void __init scan_of_devices(void) +static int __init scan_of_devices(void) { struct device_node *root = of_find_node_by_path("/"); struct of_device *parent; parent = scan_one_device(root, NULL); if (!parent) - return; + return 0; scan_tree(root->child, &parent->dev); + return 0; } - -static int __init of_bus_driver_init(void) -{ - int err; - - err = of_bus_type_init(&of_platform_bus_type, "of"); - if (!err) - scan_of_devices(); - - return err; -} - -postcore_initcall(of_bus_driver_init); +postcore_initcall(scan_of_devices); static int __init of_debug(char *str) { diff --git a/arch/sparc/kernel/of_device_common.c b/arch/sparc/kernel/of_device_common.c index 016c947d4cae..01f380c7995c 100644 --- a/arch/sparc/kernel/of_device_common.c +++ b/arch/sparc/kernel/of_device_common.c @@ -64,9 +64,6 @@ void of_propagate_archdata(struct of_device *bus) } } -struct bus_type of_platform_bus_type; -EXPORT_SYMBOL(of_platform_bus_type); - static void get_cells(struct device_node *dp, int *addrc, int *sizec) { if (addrc) diff --git a/drivers/base/platform.c b/drivers/base/platform.c index fac3633c7223..f699fabf403b 100644 --- a/drivers/base/platform.c +++ b/drivers/base/platform.c @@ -636,6 +636,12 @@ static struct device_attribute platform_dev_attrs[] = { static int platform_uevent(struct device *dev, struct kobj_uevent_env *env) { struct platform_device *pdev = to_platform_device(dev); + int rc; + + /* Some devices have extra OF data and an OF-style MODALIAS */ + rc = of_device_uevent(dev,env); + if (rc != -ENODEV) + return rc; add_uevent_var(env, "MODALIAS=%s%s", PLATFORM_MODULE_PREFIX, (pdev->id_entry) ? pdev->id_entry->name : pdev->name); diff --git a/drivers/of/device.c b/drivers/of/device.c index 5282a202f5a9..12a44b493511 100644 --- a/drivers/of/device.c +++ b/drivers/of/device.c @@ -104,6 +104,11 @@ int of_device_register(struct of_device *ofdev) device_initialize(&ofdev->dev); + /* name and id have to be set so that the platform bus doesn't get + * confused on matching */ + ofdev->name = dev_name(&ofdev->dev); + ofdev->id = -1; + /* device_add will assume that this device is on the same node as * the parent. If there is no parent defined, set the node * explicitly */ diff --git a/drivers/of/platform.c b/drivers/of/platform.c index 9d3d932bcb6f..712dfd866df0 100644 --- a/drivers/of/platform.c +++ b/drivers/of/platform.c @@ -20,6 +20,54 @@ #include #include #include +#include + +static int platform_driver_probe_shim(struct platform_device *pdev) +{ + struct platform_driver *pdrv; + struct of_platform_driver *ofpdrv; + const struct of_device_id *match; + + pdrv = container_of(pdev->dev.driver, struct platform_driver, driver); + ofpdrv = container_of(pdrv, struct of_platform_driver, platform_driver); + match = of_match_device(pdev->dev.driver->of_match_table, &pdev->dev); + return ofpdrv->probe(pdev, match); +} + +static void platform_driver_shutdown_shim(struct platform_device *pdev) +{ + struct platform_driver *pdrv; + struct of_platform_driver *ofpdrv; + + pdrv = container_of(pdev->dev.driver, struct platform_driver, driver); + ofpdrv = container_of(pdrv, struct of_platform_driver, platform_driver); + ofpdrv->shutdown(pdev); +} + +/** + * of_register_platform_driver + */ +int of_register_platform_driver(struct of_platform_driver *drv) +{ + /* setup of_platform_driver to platform_driver adaptors */ + drv->platform_driver.driver = drv->driver; + if (drv->probe) + drv->platform_driver.probe = platform_driver_probe_shim; + drv->platform_driver.remove = drv->remove; + if (drv->shutdown) + drv->platform_driver.shutdown = platform_driver_shutdown_shim; + drv->platform_driver.suspend = drv->suspend; + drv->platform_driver.resume = drv->resume; + + return platform_driver_register(&drv->platform_driver); +} +EXPORT_SYMBOL(of_register_platform_driver); + +void of_unregister_platform_driver(struct of_platform_driver *drv) +{ + platform_driver_unregister(&drv->platform_driver); +} +EXPORT_SYMBOL(of_unregister_platform_driver); #if defined(CONFIG_PPC_DCR) #include @@ -392,16 +440,29 @@ int of_bus_type_init(struct bus_type *bus, const char *name) int of_register_driver(struct of_platform_driver *drv, struct bus_type *bus) { - drv->driver.bus = bus; + /* + * Temporary: of_platform_bus used to be distinct from the platform + * bus. It isn't anymore, and so drivers on the platform bus need + * to be registered in a special way. + * + * After all of_platform_bus_type drivers are converted to + * platform_drivers, this exception can be removed. + */ + if (bus == &platform_bus_type) + return of_register_platform_driver(drv); /* register with core */ + drv->driver.bus = bus; return driver_register(&drv->driver); } EXPORT_SYMBOL(of_register_driver); void of_unregister_driver(struct of_platform_driver *drv) { - driver_unregister(&drv->driver); + if (drv->driver.bus == &platform_bus_type) + of_unregister_platform_driver(drv); + else + driver_unregister(&drv->driver); } EXPORT_SYMBOL(of_unregister_driver); @@ -548,7 +609,7 @@ struct of_device *of_platform_device_create(struct device_node *np, dev->archdata.dma_mask = 0xffffffffUL; #endif dev->dev.coherent_dma_mask = DMA_BIT_MASK(32); - dev->dev.bus = &of_platform_bus_type; + dev->dev.bus = &platform_bus_type; /* We do not fill the DMA ops for platform devices by default. * This is currently the responsibility of the platform code diff --git a/include/linux/of_device.h b/include/linux/of_device.h index 7d27f5a878f6..8cd1fe7864e3 100644 --- a/include/linux/of_device.h +++ b/include/linux/of_device.h @@ -65,6 +65,12 @@ static inline int of_driver_match_device(struct device *dev, return 0; } +static inline int of_device_uevent(struct device *dev, + struct kobj_uevent_env *env) +{ + return -ENODEV; +} + #endif /* CONFIG_OF_DEVICE */ #endif /* _LINUX_OF_DEVICE_H */ diff --git a/include/linux/of_platform.h b/include/linux/of_platform.h index a51fd30176aa..133ecf31a60f 100644 --- a/include/linux/of_platform.h +++ b/include/linux/of_platform.h @@ -17,19 +17,19 @@ #include #include #include +#include /* - * The of_platform_bus_type is a bus type used by drivers that do not - * attach to a macio or similar bus but still use OF probing - * mechanism + * of_platform_bus_type isn't it's own bus anymore. It's now just an alias + * for the platform bus. */ -extern struct bus_type of_platform_bus_type; +#define of_platform_bus_type platform_bus_type extern const struct of_device_id of_default_bus_ids[]; /* * An of_platform_driver driver is attached to a basic of_device on - * the "platform bus" (of_platform_bus_type). + * the "platform bus" (platform_bus_type). */ struct of_platform_driver { @@ -42,6 +42,7 @@ struct of_platform_driver int (*shutdown)(struct of_device* dev); struct device_driver driver; + struct platform_driver platform_driver; }; #define to_of_platform_driver(drv) \ container_of(drv,struct of_platform_driver, driver) @@ -51,14 +52,8 @@ extern int of_register_driver(struct of_platform_driver *drv, extern void of_unregister_driver(struct of_platform_driver *drv); /* Platform drivers register/unregister */ -static inline int of_register_platform_driver(struct of_platform_driver *drv) -{ - return of_register_driver(drv, &of_platform_bus_type); -} -static inline void of_unregister_platform_driver(struct of_platform_driver *drv) -{ - of_unregister_driver(drv); -} +extern int of_register_platform_driver(struct of_platform_driver *drv); +extern void of_unregister_platform_driver(struct of_platform_driver *drv); extern struct of_device *of_device_alloc(struct device_node *np, const char *bus_id, -- cgit v1.2.3 From ed1d218c95c6846416ddb39085b20a5b3c0872e4 Mon Sep 17 00:00:00 2001 From: Marin Mitov Date: Mon, 31 May 2010 13:03:04 +0300 Subject: Driver core: internal struct dma_coherent_mem, change type of a member. struct dma_coherent_mem in drivers/base/dma-coherent.c has member 'device_base' that is of type u32, but is assigned value of type dma_addr_t, which may be 64 bits for x86_64. Change the type to dma_addr_t. Signed-off-by: Marin Mitov Signed-off-by: Greg Kroah-Hartman --- drivers/base/dma-coherent.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/base') diff --git a/drivers/base/dma-coherent.c b/drivers/base/dma-coherent.c index d4d8ce53886a..f369e2795985 100644 --- a/drivers/base/dma-coherent.c +++ b/drivers/base/dma-coherent.c @@ -8,7 +8,7 @@ struct dma_coherent_mem { void *virt_base; - u32 device_base; + dma_addr_t device_base; int size; int flags; unsigned long *bitmap; -- cgit v1.2.3 From 0983ca2d0f0ff645bc86899aefb936cffb314839 Mon Sep 17 00:00:00 2001 From: Dmitry Torokhov Date: Fri, 4 Jun 2010 00:54:37 -0700 Subject: firmware loader: use statically initialized data attribute There is no reason why we are using a template for binary attribute and copying it into per-firmware data before registering. Using the original works as well. Signed-off-by: Dmitry Torokhov Signed-off-by: Greg Kroah-Hartman --- drivers/base/firmware_class.c | 9 +++------ 1 file changed, 3 insertions(+), 6 deletions(-) (limited to 'drivers/base') diff --git a/drivers/base/firmware_class.c b/drivers/base/firmware_class.c index 3f093b0dd217..fb29c64ebecc 100644 --- a/drivers/base/firmware_class.c +++ b/drivers/base/firmware_class.c @@ -87,7 +87,6 @@ static DEFINE_MUTEX(fw_lock); struct firmware_priv { struct completion completion; - struct bin_attribute attr_data; struct firmware *fw; unsigned long status; struct page **pages; @@ -420,8 +419,8 @@ out: return retval; } -static struct bin_attribute firmware_attr_data_tmpl = { - .attr = {.name = "data", .mode = 0644}, +static struct bin_attribute firmware_attr_data = { + .attr = { .name = "data", .mode = 0644 }, .size = 0, .read = firmware_data_read, .write = firmware_data_write, @@ -452,7 +451,6 @@ static int fw_register_device(struct device **dev_p, const char *fw_name, strcpy(fw_priv->fw_id, fw_name); init_completion(&fw_priv->completion); - fw_priv->attr_data = firmware_attr_data_tmpl; fw_priv->timeout.function = firmware_class_timeout; fw_priv->timeout.data = (u_long) fw_priv; init_timer(&fw_priv->timeout); @@ -498,8 +496,7 @@ static int fw_setup_device(struct firmware *fw, struct device **dev_p, fw_priv->nowait = nowait; fw_priv->fw = fw; - sysfs_bin_attr_init(&fw_priv->attr_data); - retval = sysfs_create_bin_file(&f_dev->kobj, &fw_priv->attr_data); + retval = sysfs_create_bin_file(&f_dev->kobj, &firmware_attr_data); if (retval) { dev_err(device, "%s: sysfs_create_bin_file failed\n", __func__); goto error_unreg; -- cgit v1.2.3 From f8a4bd3456b988fc73b2c291b9e01b434c8fa940 Mon Sep 17 00:00:00 2001 From: Dmitry Torokhov Date: Fri, 4 Jun 2010 00:54:43 -0700 Subject: firmware loader: embed device into firmware_priv structure Both these structures have the same lifetime rules so instead of allocating and managing them separately embed struct device into struct firmware_priv. Also make sure to delete sysfs attributes ourselves instead of expecting sysfs to clean up our mess. Signed-off-by: Dmitry Torokhov Signed-off-by: Greg Kroah-Hartman --- drivers/base/firmware_class.c | 255 ++++++++++++++++++++---------------------- 1 file changed, 122 insertions(+), 133 deletions(-) (limited to 'drivers/base') diff --git a/drivers/base/firmware_class.c b/drivers/base/firmware_class.c index fb29c64ebecc..c8a44f5e0584 100644 --- a/drivers/base/firmware_class.c +++ b/drivers/base/firmware_class.c @@ -93,22 +93,26 @@ struct firmware_priv { int nr_pages; int page_array_size; struct timer_list timeout; + struct device dev; bool nowait; char fw_id[]; }; -static void -fw_load_abort(struct firmware_priv *fw_priv) +static struct firmware_priv *to_firmware_priv(struct device *dev) +{ + return container_of(dev, struct firmware_priv, dev); +} + +static void fw_load_abort(struct firmware_priv *fw_priv) { set_bit(FW_STATUS_ABORT, &fw_priv->status); wmb(); complete(&fw_priv->completion); } -static ssize_t -firmware_timeout_show(struct class *class, - struct class_attribute *attr, - char *buf) +static ssize_t firmware_timeout_show(struct class *class, + struct class_attribute *attr, + char *buf) { return sprintf(buf, "%d\n", loading_timeout); } @@ -126,14 +130,14 @@ firmware_timeout_show(struct class *class, * * Note: zero means 'wait forever'. **/ -static ssize_t -firmware_timeout_store(struct class *class, - struct class_attribute *attr, - const char *buf, size_t count) +static ssize_t firmware_timeout_store(struct class *class, + struct class_attribute *attr, + const char *buf, size_t count) { loading_timeout = simple_strtol(buf, NULL, 10); if (loading_timeout < 0) loading_timeout = 0; + return count; } @@ -145,21 +149,20 @@ static struct class_attribute firmware_class_attrs[] = { static void fw_dev_release(struct device *dev) { - struct firmware_priv *fw_priv = dev_get_drvdata(dev); + struct firmware_priv *fw_priv = to_firmware_priv(dev); int i; for (i = 0; i < fw_priv->nr_pages; i++) __free_page(fw_priv->pages[i]); kfree(fw_priv->pages); kfree(fw_priv); - kfree(dev); module_put(THIS_MODULE); } static int firmware_uevent(struct device *dev, struct kobj_uevent_env *env) { - struct firmware_priv *fw_priv = dev_get_drvdata(dev); + struct firmware_priv *fw_priv = to_firmware_priv(dev); if (add_uevent_var(env, "FIRMWARE=%s", fw_priv->fw_id)) return -ENOMEM; @@ -181,8 +184,9 @@ static struct class firmware_class = { static ssize_t firmware_loading_show(struct device *dev, struct device_attribute *attr, char *buf) { - struct firmware_priv *fw_priv = dev_get_drvdata(dev); + struct firmware_priv *fw_priv = to_firmware_priv(dev); int loading = test_bit(FW_STATUS_LOADING, &fw_priv->status); + return sprintf(buf, "%d\n", loading); } @@ -218,7 +222,7 @@ static ssize_t firmware_loading_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { - struct firmware_priv *fw_priv = dev_get_drvdata(dev); + struct firmware_priv *fw_priv = to_firmware_priv(dev); int loading = simple_strtol(buf, NULL, 10); int i; @@ -276,13 +280,12 @@ static ssize_t firmware_loading_store(struct device *dev, static DEVICE_ATTR(loading, 0644, firmware_loading_show, firmware_loading_store); -static ssize_t -firmware_data_read(struct file *filp, struct kobject *kobj, - struct bin_attribute *bin_attr, char *buffer, loff_t offset, - size_t count) +static ssize_t firmware_data_read(struct file *filp, struct kobject *kobj, + struct bin_attribute *bin_attr, + char *buffer, loff_t offset, size_t count) { struct device *dev = to_dev(kobj); - struct firmware_priv *fw_priv = dev_get_drvdata(dev); + struct firmware_priv *fw_priv = to_firmware_priv(dev); struct firmware *fw; ssize_t ret_count; @@ -321,8 +324,7 @@ out: return ret_count; } -static int -fw_realloc_buffer(struct firmware_priv *fw_priv, int min_size) +static int fw_realloc_buffer(struct firmware_priv *fw_priv, int min_size) { int pages_needed = ALIGN(min_size, PAGE_SIZE) >> PAGE_SHIFT; @@ -372,13 +374,12 @@ fw_realloc_buffer(struct firmware_priv *fw_priv, int min_size) * Data written to the 'data' attribute will be later handed to * the driver as a firmware image. **/ -static ssize_t -firmware_data_write(struct file* filp, struct kobject *kobj, - struct bin_attribute *bin_attr, char *buffer, - loff_t offset, size_t count) +static ssize_t firmware_data_write(struct file *filp, struct kobject *kobj, + struct bin_attribute *bin_attr, + char *buffer, loff_t offset, size_t count) { struct device *dev = to_dev(kobj); - struct firmware_priv *fw_priv = dev_get_drvdata(dev); + struct firmware_priv *fw_priv = to_firmware_priv(dev); struct firmware *fw; ssize_t retval; @@ -426,107 +427,96 @@ static struct bin_attribute firmware_attr_data = { .write = firmware_data_write, }; -static void -firmware_class_timeout(u_long data) +static void firmware_class_timeout(u_long data) { struct firmware_priv *fw_priv = (struct firmware_priv *) data; + fw_load_abort(fw_priv); } -static int fw_register_device(struct device **dev_p, const char *fw_name, - struct device *device) +static struct firmware_priv * +fw_create_instance(struct firmware *firmware, const char *fw_name, + struct device *device, bool uevent, bool nowait) { - int retval; - struct firmware_priv *fw_priv = - kzalloc(sizeof(*fw_priv) + strlen(fw_name) + 1 , GFP_KERNEL); - struct device *f_dev = kzalloc(sizeof(*f_dev), GFP_KERNEL); - - *dev_p = NULL; + struct firmware_priv *fw_priv; + struct device *f_dev; + int error; - if (!fw_priv || !f_dev) { + fw_priv = kzalloc(sizeof(*fw_priv) + strlen(fw_name) + 1 , GFP_KERNEL); + if (!fw_priv) { dev_err(device, "%s: kmalloc failed\n", __func__); - retval = -ENOMEM; - goto error_kfree; + error = -ENOMEM; + goto err_out; } + fw_priv->fw = firmware; + fw_priv->nowait = nowait; strcpy(fw_priv->fw_id, fw_name); init_completion(&fw_priv->completion); - fw_priv->timeout.function = firmware_class_timeout; - fw_priv->timeout.data = (u_long) fw_priv; - init_timer(&fw_priv->timeout); + setup_timer(&fw_priv->timeout, + firmware_class_timeout, (u_long) fw_priv); + f_dev = &fw_priv->dev; + + device_initialize(f_dev); dev_set_name(f_dev, "%s", dev_name(device)); f_dev->parent = device; f_dev->class = &firmware_class; - dev_set_drvdata(f_dev, fw_priv); - dev_set_uevent_suppress(f_dev, 1); - retval = device_register(f_dev); - if (retval) { - dev_err(device, "%s: device_register failed\n", __func__); - put_device(f_dev); - return retval; - } - *dev_p = f_dev; - return 0; - -error_kfree: - kfree(f_dev); - kfree(fw_priv); - return retval; -} -static int fw_setup_device(struct firmware *fw, struct device **dev_p, - const char *fw_name, struct device *device, - int uevent, bool nowait) -{ - struct device *f_dev; - struct firmware_priv *fw_priv; - int retval; - - *dev_p = NULL; - retval = fw_register_device(&f_dev, fw_name, device); - if (retval) - goto out; + dev_set_uevent_suppress(f_dev, true); /* Need to pin this module until class device is destroyed */ __module_get(THIS_MODULE); - fw_priv = dev_get_drvdata(f_dev); - - fw_priv->nowait = nowait; + error = device_add(f_dev); + if (error) { + dev_err(device, "%s: device_register failed\n", __func__); + goto err_put_dev; + } - fw_priv->fw = fw; - retval = sysfs_create_bin_file(&f_dev->kobj, &firmware_attr_data); - if (retval) { + error = device_create_bin_file(f_dev, &firmware_attr_data); + if (error) { dev_err(device, "%s: sysfs_create_bin_file failed\n", __func__); - goto error_unreg; + goto err_del_dev; } - retval = device_create_file(f_dev, &dev_attr_loading); - if (retval) { + error = device_create_file(f_dev, &dev_attr_loading); + if (error) { dev_err(device, "%s: device_create_file failed\n", __func__); - goto error_unreg; + goto err_del_bin_attr; } if (uevent) - dev_set_uevent_suppress(f_dev, 0); - *dev_p = f_dev; - goto out; + dev_set_uevent_suppress(f_dev, false); + + return fw_priv; + +err_del_bin_attr: + device_remove_bin_file(f_dev, &firmware_attr_data); +err_del_dev: + device_del(f_dev); +err_put_dev: + put_device(f_dev); +err_out: + return ERR_PTR(error); +} + +static void fw_destroy_instance(struct firmware_priv *fw_priv) +{ + struct device *f_dev = &fw_priv->dev; -error_unreg: + device_remove_file(f_dev, &dev_attr_loading); + device_remove_bin_file(f_dev, &firmware_attr_data); device_unregister(f_dev); -out: - return retval; } -static int -_request_firmware(const struct firmware **firmware_p, const char *name, - struct device *device, int uevent, bool nowait) +static int _request_firmware(const struct firmware **firmware_p, + const char *name, struct device *device, + bool uevent, bool nowait) { - struct device *f_dev; struct firmware_priv *fw_priv; struct firmware *firmware; - int retval; + int retval = 0; if (!firmware_p) return -EINVAL; @@ -547,41 +537,40 @@ _request_firmware(const struct firmware **firmware_p, const char *name, if (uevent) dev_dbg(device, "firmware: requesting %s\n", name); - retval = fw_setup_device(firmware, &f_dev, name, device, - uevent, nowait); - if (retval) - goto error_kfree_fw; - - fw_priv = dev_get_drvdata(f_dev); + fw_priv = fw_create_instance(firmware, name, device, uevent, nowait); + if (IS_ERR(fw_priv)) { + retval = PTR_ERR(fw_priv); + goto out; + } if (uevent) { - if (loading_timeout > 0) { - fw_priv->timeout.expires = jiffies + loading_timeout * HZ; - add_timer(&fw_priv->timeout); - } + if (loading_timeout > 0) + mod_timer(&fw_priv->timeout, + round_jiffies_up(jiffies + + loading_timeout * HZ)); + + kobject_uevent(&fw_priv->dev.kobj, KOBJ_ADD); + } + + wait_for_completion(&fw_priv->completion); - kobject_uevent(&f_dev->kobj, KOBJ_ADD); - wait_for_completion(&fw_priv->completion); - set_bit(FW_STATUS_DONE, &fw_priv->status); - del_timer_sync(&fw_priv->timeout); - } else - wait_for_completion(&fw_priv->completion); + set_bit(FW_STATUS_DONE, &fw_priv->status); + del_timer_sync(&fw_priv->timeout); mutex_lock(&fw_lock); - if (!fw_priv->fw->size || test_bit(FW_STATUS_ABORT, &fw_priv->status)) { + if (!fw_priv->fw->size || test_bit(FW_STATUS_ABORT, &fw_priv->status)) retval = -ENOENT; - release_firmware(fw_priv->fw); - *firmware_p = NULL; - } fw_priv->fw = NULL; mutex_unlock(&fw_lock); - device_unregister(f_dev); - goto out; -error_kfree_fw: - kfree(firmware); - *firmware_p = NULL; + fw_destroy_instance(fw_priv); + out: + if (retval) { + release_firmware(firmware); + firmware_p = NULL; + } + return retval; } @@ -632,23 +621,24 @@ struct firmware_work { int uevent; }; -static int -request_firmware_work_func(void *arg) +static int request_firmware_work_func(void *arg) { struct firmware_work *fw_work = arg; const struct firmware *fw; int ret; + if (!arg) { WARN_ON(1); return 0; } - ret = _request_firmware(&fw, fw_work->name, fw_work->device, - fw_work->uevent, true); + ret = _request_firmware(&fw, fw_work->name, fw_work->device, + fw_work->uevent, true); fw_work->cont(fw, fw_work->context); module_put(fw_work->module); kfree(fw_work); + return ret; } @@ -676,34 +666,33 @@ request_firmware_nowait( void (*cont)(const struct firmware *fw, void *context)) { struct task_struct *task; - struct firmware_work *fw_work = kmalloc(sizeof (struct firmware_work), - gfp); + struct firmware_work *fw_work; + fw_work = kzalloc(sizeof (struct firmware_work), gfp); if (!fw_work) return -ENOMEM; + + fw_work->module = module; + fw_work->name = name; + fw_work->device = device; + fw_work->context = context; + fw_work->cont = cont; + fw_work->uevent = uevent; + if (!try_module_get(module)) { kfree(fw_work); return -EFAULT; } - *fw_work = (struct firmware_work) { - .module = module, - .name = name, - .device = device, - .context = context, - .cont = cont, - .uevent = uevent, - }; - task = kthread_run(request_firmware_work_func, fw_work, "firmware/%s", name); - if (IS_ERR(task)) { fw_work->cont(NULL, fw_work->context); module_put(fw_work->module); kfree(fw_work); return PTR_ERR(task); } + return 0; } -- cgit v1.2.3 From 3e61dfd8509a52d165726831c57b4c8a015d626c Mon Sep 17 00:00:00 2001 From: Uwe Kleine-König Date: Tue, 15 Jun 2010 10:47:55 +0200 Subject: Driver core: use kmemdup in platform_device_add_resources MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This makes platform_device_add_resources look like platform_device_add_data. Signed-off-by: Uwe Kleine-König Signed-off-by: Greg Kroah-Hartman --- drivers/base/platform.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'drivers/base') diff --git a/drivers/base/platform.c b/drivers/base/platform.c index 4d99c8bdfedc..26eb69d88eb6 100644 --- a/drivers/base/platform.c +++ b/drivers/base/platform.c @@ -191,13 +191,13 @@ int platform_device_add_resources(struct platform_device *pdev, { struct resource *r; - r = kmalloc(sizeof(struct resource) * num, GFP_KERNEL); + r = kmemdup(res, sizeof(struct resource) * num, GFP_KERNEL); if (r) { - memcpy(r, res, sizeof(struct resource) * num); pdev->resource = r; pdev->num_resources = num; + return 0; } - return r ? 0 : -ENOMEM; + return -ENOMEM; } EXPORT_SYMBOL_GPL(platform_device_add_resources); -- cgit v1.2.3 From 44f28bdea09415d40b4d73a7668db5961362ec53 Mon Sep 17 00:00:00 2001 From: Uwe Kleine-König Date: Mon, 21 Jun 2010 16:11:44 +0200 Subject: Driver core: reduce duplicated code for platform_device creation MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This makes the two similar functions platform_device_register_simple and platform_device_register_data one line inline functions using a new generic function platform_device_register_resndata. Signed-off-by: Uwe Kleine-König Signed-off-by: Greg Kroah-Hartman --- Documentation/DocBook/device-drivers.tmpl | 1 + drivers/base/platform.c | 104 ++++++++---------------------- include/linux/platform_device.h | 62 ++++++++++++++++-- 3 files changed, 85 insertions(+), 82 deletions(-) (limited to 'drivers/base') diff --git a/Documentation/DocBook/device-drivers.tmpl b/Documentation/DocBook/device-drivers.tmpl index 1b2dd4fc3db2..ecd35e9d4410 100644 --- a/Documentation/DocBook/device-drivers.tmpl +++ b/Documentation/DocBook/device-drivers.tmpl @@ -111,6 +111,7 @@ X!Edrivers/base/attribute_container.c +!Iinclude/linux/platform_device.h !Edrivers/base/platform.c !Edrivers/base/bus.c diff --git a/drivers/base/platform.c b/drivers/base/platform.c index 26eb69d88eb6..ffcfd73fe8a6 100644 --- a/drivers/base/platform.c +++ b/drivers/base/platform.c @@ -344,108 +344,56 @@ void platform_device_unregister(struct platform_device *pdev) EXPORT_SYMBOL_GPL(platform_device_unregister); /** - * platform_device_register_simple - add a platform-level device and its resources - * @name: base name of the device we're adding - * @id: instance id - * @res: set of resources that needs to be allocated for the device - * @num: number of resources - * - * This function creates a simple platform device that requires minimal - * resource and memory management. Canned release function freeing memory - * allocated for the device allows drivers using such devices to be - * unloaded without waiting for the last reference to the device to be - * dropped. + * platform_device_register_resndata - add a platform-level device with + * resources and platform-specific data * - * This interface is primarily intended for use with legacy drivers which - * probe hardware directly. Because such drivers create sysfs device nodes - * themselves, rather than letting system infrastructure handle such device - * enumeration tasks, they don't fully conform to the Linux driver model. - * In particular, when such drivers are built as modules, they can't be - * "hotplugged". - * - * Returns &struct platform_device pointer on success, or ERR_PTR() on error. - */ -struct platform_device *platform_device_register_simple(const char *name, - int id, - const struct resource *res, - unsigned int num) -{ - struct platform_device *pdev; - int retval; - - pdev = platform_device_alloc(name, id); - if (!pdev) { - retval = -ENOMEM; - goto error; - } - - if (num) { - retval = platform_device_add_resources(pdev, res, num); - if (retval) - goto error; - } - - retval = platform_device_add(pdev); - if (retval) - goto error; - - return pdev; - -error: - platform_device_put(pdev); - return ERR_PTR(retval); -} -EXPORT_SYMBOL_GPL(platform_device_register_simple); - -/** - * platform_device_register_data - add a platform-level device with platform-specific data * @parent: parent device for the device we're adding * @name: base name of the device we're adding * @id: instance id + * @res: set of resources that needs to be allocated for the device + * @num: number of resources * @data: platform specific data for this platform device * @size: size of platform specific data * - * This function creates a simple platform device that requires minimal - * resource and memory management. Canned release function freeing memory - * allocated for the device allows drivers using such devices to be - * unloaded without waiting for the last reference to the device to be - * dropped. - * * Returns &struct platform_device pointer on success, or ERR_PTR() on error. */ -struct platform_device *platform_device_register_data( +struct platform_device *platform_device_register_resndata( struct device *parent, const char *name, int id, + const struct resource *res, unsigned int num, const void *data, size_t size) { + int ret = -ENOMEM; struct platform_device *pdev; - int retval; pdev = platform_device_alloc(name, id); - if (!pdev) { - retval = -ENOMEM; - goto error; - } + if (!pdev) + goto err; pdev->dev.parent = parent; - if (size) { - retval = platform_device_add_data(pdev, data, size); - if (retval) - goto error; + if (res) { + ret = platform_device_add_resources(pdev, res, num); + if (ret) + goto err; } - retval = platform_device_add(pdev); - if (retval) - goto error; + if (data) { + ret = platform_device_add_data(pdev, data, size); + if (ret) + goto err; + } - return pdev; + ret = platform_device_add(pdev); + if (ret) { +err: + platform_device_put(pdev); + return ERR_PTR(ret); + } -error: - platform_device_put(pdev); - return ERR_PTR(retval); + return pdev; } -EXPORT_SYMBOL_GPL(platform_device_register_data); +EXPORT_SYMBOL_GPL(platform_device_register_resndata); static int platform_drv_probe(struct device *_dev) { diff --git a/include/linux/platform_device.h b/include/linux/platform_device.h index 5417944d3687..d7ecad0093bb 100644 --- a/include/linux/platform_device.h +++ b/include/linux/platform_device.h @@ -43,10 +43,64 @@ extern struct resource *platform_get_resource_byname(struct platform_device *, u extern int platform_get_irq_byname(struct platform_device *, const char *); extern int platform_add_devices(struct platform_device **, int); -extern struct platform_device *platform_device_register_simple(const char *, int id, - const struct resource *, unsigned int); -extern struct platform_device *platform_device_register_data(struct device *, - const char *, int, const void *, size_t); +extern struct platform_device *platform_device_register_resndata( + struct device *parent, const char *name, int id, + const struct resource *res, unsigned int num, + const void *data, size_t size); + +/** + * platform_device_register_simple - add a platform-level device and its resources + * @name: base name of the device we're adding + * @id: instance id + * @res: set of resources that needs to be allocated for the device + * @num: number of resources + * + * This function creates a simple platform device that requires minimal + * resource and memory management. Canned release function freeing memory + * allocated for the device allows drivers using such devices to be + * unloaded without waiting for the last reference to the device to be + * dropped. + * + * This interface is primarily intended for use with legacy drivers which + * probe hardware directly. Because such drivers create sysfs device nodes + * themselves, rather than letting system infrastructure handle such device + * enumeration tasks, they don't fully conform to the Linux driver model. + * In particular, when such drivers are built as modules, they can't be + * "hotplugged". + * + * Returns &struct platform_device pointer on success, or ERR_PTR() on error. + */ +static inline struct platform_device *platform_device_register_simple( + const char *name, int id, + const struct resource *res, unsigned int num) +{ + return platform_device_register_resndata(NULL, name, id, + res, num, NULL, 0); +} + +/** + * platform_device_register_data - add a platform-level device with platform-specific data + * @parent: parent device for the device we're adding + * @name: base name of the device we're adding + * @id: instance id + * @data: platform specific data for this platform device + * @size: size of platform specific data + * + * This function creates a simple platform device that requires minimal + * resource and memory management. Canned release function freeing memory + * allocated for the device allows drivers using such devices to be + * unloaded without waiting for the last reference to the device to be + * dropped. + * + * Returns &struct platform_device pointer on success, or ERR_PTR() on error. + */ +static inline struct platform_device *platform_device_register_data( + struct device *parent, const char *name, int id, + const void *data, size_t size) +{ + return platform_device_register_resndata(parent, name, id, + NULL, 0, data, size); +} extern struct platform_device *platform_device_alloc(const char *name, int id); extern int platform_device_add_resources(struct platform_device *pdev, -- cgit v1.2.3 From 737a3bb9416ce2a7c7a4170852473a4fcc9c67e8 Mon Sep 17 00:00:00 2001 From: Uwe Kleine-König Date: Mon, 21 Jun 2010 16:11:45 +0200 Subject: Driver core: move platform device creation helpers to .init.text (if MODULE=n) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Platform devices should only be called by init code, so it should be possible to move creation helpers to .init.text -- at least if modules are disabled. Signed-off-by: Uwe Kleine-König Signed-off-by: Greg Kroah-Hartman --- drivers/base/platform.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/base') diff --git a/drivers/base/platform.c b/drivers/base/platform.c index ffcfd73fe8a6..1bb8faaa443f 100644 --- a/drivers/base/platform.c +++ b/drivers/base/platform.c @@ -357,7 +357,7 @@ EXPORT_SYMBOL_GPL(platform_device_unregister); * * Returns &struct platform_device pointer on success, or ERR_PTR() on error. */ -struct platform_device *platform_device_register_resndata( +struct platform_device *__init_or_module platform_device_register_resndata( struct device *parent, const char *name, int id, const struct resource *res, unsigned int num, -- cgit v1.2.3 From 600c20f34f645adf7884277302b10601583aa7d5 Mon Sep 17 00:00:00 2001 From: Jike Song Date: Thu, 15 Jul 2010 17:43:54 +0800 Subject: driver core: fix memory leak on one error path in bus_register() Reported-by: huangweibing@gmail.com Signed-off-by: Jike Song Signed-off-by: Greg Kroah-Hartman --- drivers/base/bus.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/base') diff --git a/drivers/base/bus.c b/drivers/base/bus.c index 12eec3f633b1..eb1b7fa20dce 100644 --- a/drivers/base/bus.c +++ b/drivers/base/bus.c @@ -945,8 +945,8 @@ bus_devices_fail: bus_remove_file(bus, &bus_attr_uevent); bus_uevent_fail: kset_unregister(&bus->p->subsys); - kfree(bus->p); out: + kfree(bus->p); bus->p = NULL; return retval; } -- cgit v1.2.3 From 45daef0fdcc44f6af86fdebc4fc7eb7c79375398 Mon Sep 17 00:00:00 2001 From: Magnus Damm Date: Fri, 23 Jul 2010 19:56:18 +0900 Subject: Driver core: Add BUS_NOTIFY_BIND_DRIVER Add BUS_NOTIFY_BIND_DRIVER as a bus notifier event. For driver binding/unbinding we with this in place have the following bus notifier events: - BUS_NOTIFY_BIND_DRIVER - before ->probe() - BUS_NOTIFY_BOUND_DRIVER - after ->probe() - BUS_NOTIFY_UNBIND_DRIVER - before ->remove() - BUS_NOTIFY_UNBOUND_DRIVER - after ->remove() The event BUS_NOTIFY_BIND_DRIVER allows bus code to be notified that ->probe() is about to be called. Useful for bus code that needs to setup hardware before the driver gets to run. With this in place platform drivers can be loaded and unloaded as modules and the new BIND event allows bus code to control for instance device clocks that must be enabled before the driver can be executed. Without this patch there is no way for the bus code to get notified that a modular driver is about to be probed. Signed-off-by: Magnus Damm Signed-off-by: Greg Kroah-Hartman --- drivers/base/dd.c | 4 ++++ include/linux/device.h | 8 +++++--- 2 files changed, 9 insertions(+), 3 deletions(-) (limited to 'drivers/base') diff --git a/drivers/base/dd.c b/drivers/base/dd.c index 503c2620bbcc..da57ee9d63fe 100644 --- a/drivers/base/dd.c +++ b/drivers/base/dd.c @@ -51,6 +51,10 @@ static int driver_sysfs_add(struct device *dev) { int ret; + if (dev->bus) + blocking_notifier_call_chain(&dev->bus->p->bus_notifier, + BUS_NOTIFY_BIND_DRIVER, dev); + ret = sysfs_create_link(&dev->driver->p->kobj, &dev->kobj, kobject_name(&dev->kobj)); if (ret == 0) { diff --git a/include/linux/device.h b/include/linux/device.h index ddffdf7da393..0ca24e93304f 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -109,10 +109,12 @@ extern int bus_unregister_notifier(struct bus_type *bus, */ #define BUS_NOTIFY_ADD_DEVICE 0x00000001 /* device added */ #define BUS_NOTIFY_DEL_DEVICE 0x00000002 /* device removed */ -#define BUS_NOTIFY_BOUND_DRIVER 0x00000003 /* driver bound to device */ -#define BUS_NOTIFY_UNBIND_DRIVER 0x00000004 /* driver about to be +#define BUS_NOTIFY_BIND_DRIVER 0x00000003 /* driver about to be + bound */ +#define BUS_NOTIFY_BOUND_DRIVER 0x00000004 /* driver bound to device */ +#define BUS_NOTIFY_UNBIND_DRIVER 0x00000005 /* driver about to be unbound */ -#define BUS_NOTIFY_UNBOUND_DRIVER 0x00000005 /* driver is unbound +#define BUS_NOTIFY_UNBOUND_DRIVER 0x00000006 /* driver is unbound from the device */ extern struct kset *bus_get_kset(struct bus_type *bus); -- cgit v1.2.3 From 6937e8f8c0135f2325194c372ada6dc655499992 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Thu, 5 Aug 2010 17:38:18 +0200 Subject: driver core: device_rename's new_name can be const The new_name argument to device_rename() can be const as kobject_rename's new_name argument is. Signed-off-by: Johannes Berg Signed-off-by: Greg Kroah-Hartman --- drivers/base/core.c | 2 +- include/linux/device.h | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/base') diff --git a/drivers/base/core.c b/drivers/base/core.c index f8e72724dd4b..d1b2c9adc271 100644 --- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -1599,7 +1599,7 @@ EXPORT_SYMBOL_GPL(device_destroy); * on the same device to ensure that new_name is valid and * won't conflict with other devices. */ -int device_rename(struct device *dev, char *new_name) +int device_rename(struct device *dev, const char *new_name) { char *old_class_name = NULL; char *new_class_name = NULL; diff --git a/include/linux/device.h b/include/linux/device.h index 0ca24e93304f..516fecacf27b 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -552,7 +552,7 @@ extern int device_for_each_child(struct device *dev, void *data, int (*fn)(struct device *dev, void *data)); extern struct device *device_find_child(struct device *dev, void *data, int (*match)(struct device *dev, void *data)); -extern int device_rename(struct device *dev, char *new_name); +extern int device_rename(struct device *dev, const char *new_name); extern int device_move(struct device *dev, struct device *new_parent, enum dpm_order dpm_order); extern const char *device_get_devnode(struct device *dev, -- cgit v1.2.3 From 7ee92255470daa0edb93866aec6e27534cd9a177 Mon Sep 17 00:00:00 2001 From: KOSAKI Motohiro Date: Mon, 9 Aug 2010 17:19:50 -0700 Subject: drivers/base/node.c: reduce stack usage of node_read_meminfo() drivers/base/node.c: In function 'node_read_meminfo': drivers/base/node.c:139: warning: the frame size of 848 bytes is larger than 512 bytes Fix it by splitting the sprintf() into three parts. It has no functional change. Signed-off-by: KOSAKI Motohiro Cc: Greg KH Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/base/node.c | 46 +++++++++++++++++++++++----------------------- 1 file changed, 23 insertions(+), 23 deletions(-) (limited to 'drivers/base') diff --git a/drivers/base/node.c b/drivers/base/node.c index 2bdd8a94ec94..2872e86837b2 100644 --- a/drivers/base/node.c +++ b/drivers/base/node.c @@ -66,8 +66,7 @@ static ssize_t node_read_meminfo(struct sys_device * dev, struct sysinfo i; si_meminfo_node(&i, nid); - - n = sprintf(buf, "\n" + n = sprintf(buf, "Node %d MemTotal: %8lu kB\n" "Node %d MemFree: %8lu kB\n" "Node %d MemUsed: %8lu kB\n" @@ -78,13 +77,33 @@ static ssize_t node_read_meminfo(struct sys_device * dev, "Node %d Active(file): %8lu kB\n" "Node %d Inactive(file): %8lu kB\n" "Node %d Unevictable: %8lu kB\n" - "Node %d Mlocked: %8lu kB\n" + "Node %d Mlocked: %8lu kB\n", + nid, K(i.totalram), + nid, K(i.freeram), + nid, K(i.totalram - i.freeram), + nid, K(node_page_state(nid, NR_ACTIVE_ANON) + + node_page_state(nid, NR_ACTIVE_FILE)), + nid, K(node_page_state(nid, NR_INACTIVE_ANON) + + node_page_state(nid, NR_INACTIVE_FILE)), + nid, K(node_page_state(nid, NR_ACTIVE_ANON)), + nid, K(node_page_state(nid, NR_INACTIVE_ANON)), + nid, K(node_page_state(nid, NR_ACTIVE_FILE)), + nid, K(node_page_state(nid, NR_INACTIVE_FILE)), + nid, K(node_page_state(nid, NR_UNEVICTABLE)), + nid, K(node_page_state(nid, NR_MLOCK))); + #ifdef CONFIG_HIGHMEM + n += sprintf(buf + n, "Node %d HighTotal: %8lu kB\n" "Node %d HighFree: %8lu kB\n" "Node %d LowTotal: %8lu kB\n" - "Node %d LowFree: %8lu kB\n" + "Node %d LowFree: %8lu kB\n", + nid, K(i.totalhigh), + nid, K(i.freehigh), + nid, K(i.totalram - i.totalhigh), + nid, K(i.freeram - i.freehigh)); #endif + n += sprintf(buf + n, "Node %d Dirty: %8lu kB\n" "Node %d Writeback: %8lu kB\n" "Node %d FilePages: %8lu kB\n" @@ -99,25 +118,6 @@ static ssize_t node_read_meminfo(struct sys_device * dev, "Node %d Slab: %8lu kB\n" "Node %d SReclaimable: %8lu kB\n" "Node %d SUnreclaim: %8lu kB\n", - nid, K(i.totalram), - nid, K(i.freeram), - nid, K(i.totalram - i.freeram), - nid, K(node_page_state(nid, NR_ACTIVE_ANON) + - node_page_state(nid, NR_ACTIVE_FILE)), - nid, K(node_page_state(nid, NR_INACTIVE_ANON) + - node_page_state(nid, NR_INACTIVE_FILE)), - nid, K(node_page_state(nid, NR_ACTIVE_ANON)), - nid, K(node_page_state(nid, NR_INACTIVE_ANON)), - nid, K(node_page_state(nid, NR_ACTIVE_FILE)), - nid, K(node_page_state(nid, NR_INACTIVE_FILE)), - nid, K(node_page_state(nid, NR_UNEVICTABLE)), - nid, K(node_page_state(nid, NR_MLOCK)), -#ifdef CONFIG_HIGHMEM - nid, K(i.totalhigh), - nid, K(i.freehigh), - nid, K(i.totalram - i.totalhigh), - nid, K(i.freeram - i.freehigh), -#endif nid, K(node_page_state(nid, NR_FILE_DIRTY)), nid, K(node_page_state(nid, NR_WRITEBACK)), nid, K(node_page_state(nid, NR_FILE_PAGES)), -- cgit v1.2.3