diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/Makefile | 2 | ||||
| -rw-r--r-- | kernel/exit.c | 2 | ||||
| -rw-r--r-- | kernel/fork.c | 1 | ||||
| -rw-r--r-- | kernel/posix-timers.c | 1318 | ||||
| -rw-r--r-- | kernel/signal.c | 52 | ||||
| -rw-r--r-- | kernel/timer.c | 31 |
6 files changed, 1378 insertions, 28 deletions
diff --git a/kernel/Makefile b/kernel/Makefile index 142a78613066..2929aae0c2fe 100644 --- a/kernel/Makefile +++ b/kernel/Makefile @@ -6,7 +6,7 @@ obj-y = sched.o fork.o exec_domain.o panic.o printk.o profile.o \ exit.o itimer.o time.o softirq.o resource.o \ sysctl.o capability.o ptrace.o timer.o user.o \ signal.o sys.o kmod.o workqueue.o futex.o pid.o \ - rcupdate.o intermodule.o extable.o params.o + rcupdate.o intermodule.o extable.o params.o posix-timers.o obj-$(CONFIG_GENERIC_ISA_DMA) += dma.o obj-$(CONFIG_SMP) += cpu.o diff --git a/kernel/exit.c b/kernel/exit.c index d2d7c72f1e81..6b2f1113b926 100644 --- a/kernel/exit.c +++ b/kernel/exit.c @@ -460,6 +460,7 @@ void end_lazy_tlb(struct mm_struct *mm) mmdrop(active_mm); } + /* * Turn us into a lazy TLB process if we * aren't already.. @@ -741,6 +742,7 @@ NORET_TYPE void do_exit(long code) __exit_files(tsk); __exit_fs(tsk); exit_namespace(tsk); + exit_itimers(tsk); exit_thread(); if (tsk->leader) diff --git a/kernel/fork.c b/kernel/fork.c index 5ecc19a9aab4..6f137beea865 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -813,6 +813,7 @@ static struct task_struct *copy_process(unsigned long clone_flags, INIT_LIST_HEAD(&p->children); INIT_LIST_HEAD(&p->sibling); + INIT_LIST_HEAD(&p->posix_timers); init_waitqueue_head(&p->wait_chldexit); p->vfork_done = NULL; spin_lock_init(&p->alloc_lock); diff --git a/kernel/posix-timers.c b/kernel/posix-timers.c new file mode 100644 index 000000000000..6552ffa2db39 --- /dev/null +++ b/kernel/posix-timers.c @@ -0,0 +1,1318 @@ +/* + * linux/kernel/posix_timers.c + * + * + * 2002-10-15 Posix Clocks & timers by George Anzinger + * Copyright (C) 2002 by MontaVista Software. + */ + +/* These are all the functions necessary to implement + * POSIX clocks & timers + */ + +#include <linux/mm.h> +#include <linux/smp_lock.h> +#include <linux/interrupt.h> +#include <linux/slab.h> +#include <linux/time.h> + +#include <asm/uaccess.h> +#include <asm/semaphore.h> +#include <linux/list.h> +#include <linux/init.h> +#include <linux/compiler.h> +#include <linux/idr.h> +#include <linux/posix-timers.h> + +#ifndef div_long_long_rem +#include <asm/div64.h> + +#define div_long_long_rem(dividend,divisor,remainder) ({ \ + u64 result = dividend; \ + *remainder = do_div(result,divisor); \ + result; }) + +#endif /* ifndef div_long_long_rem */ + +/* + * Management arrays for POSIX timers. Timers are kept in slab memory + * Timer ids are allocated by an external routine that keeps track of the + * id and the timer. The external interface is: + * + *void *idr_find(struct idr *idp, int id); to find timer_id <id> + *int idr_get_new(struct idr *idp, void *ptr); to get a new id and + * related it to <ptr> + *void idr_remove(struct idr *idp, int id); to release <id> + *void idr_init(struct idr *idp); to initialize <idp> + * which we supply. + * The idr_get_new *may* call slab for more memory so it must not be + * called under a spin lock. Likewise idr_remore may release memory + * (but it may be ok to do this under a lock...). + * idr_find is just a memory look up and is quite fast. A zero return + * indicates that the requested id does not exist. + + */ +/* + * Lets keep our timers in a slab cache :-) + */ +static kmem_cache_t *posix_timers_cache; +struct idr posix_timers_id; +spinlock_t idr_lock = SPIN_LOCK_UNLOCKED; + +/* + * Just because the timer is not in the timer list does NOT mean it is + * inactive. It could be in the "fire" routine getting a new expire time. + */ +#define TIMER_INACTIVE 1 +#define TIMER_RETRY 1 +#ifdef CONFIG_SMP +#define timer_active(tmr) (tmr->it_timer.entry.prev != (void *)TIMER_INACTIVE) +#define set_timer_inactive(tmr) tmr->it_timer.entry.prev = (void *)TIMER_INACTIVE +#else +#define timer_active(tmr) BARFY // error to use outside of SMP +#define set_timer_inactive(tmr) +#endif +/* + * The timer ID is turned into a timer address by idr_find(). + * Verifying a valid ID consists of: + * + * a) checking that idr_find() returns other than zero. + * b) checking that the timer id matches the one in the timer itself. + * c) that the timer owner is in the callers thread group. + */ + + +/* + * CLOCKs: The POSIX standard calls for a couple of clocks and allows us + * to implement others. This structure defines the various + * clocks and allows the possibility of adding others. We + * provide an interface to add clocks to the table and expect + * the "arch" code to add at least one clock that is high + * resolution. Here we define the standard CLOCK_REALTIME as a + * 1/HZ resolution clock. + + * CPUTIME & THREAD_CPUTIME: We are not, at this time, definding these + * two clocks (and the other process related clocks (Std + * 1003.1d-1999). The way these should be supported, we think, + * is to use large negative numbers for the two clocks that are + * pinned to the executing process and to use -pid for clocks + * pinned to particular pids. Calls which supported these clock + * ids would split early in the function. + + * RESOLUTION: Clock resolution is used to round up timer and interval + * times, NOT to report clock times, which are reported with as + * much resolution as the system can muster. In some cases this + * resolution may depend on the underlaying clock hardware and + * may not be quantifiable until run time, and only then is the + * necessary code is written. The standard says we should say + * something about this issue in the documentation... + + * FUNCTIONS: The CLOCKs structure defines possible functions to handle + * various clock functions. For clocks that use the standard + * system timer code these entries should be NULL. This will + * allow dispatch without the overhead of indirect function + * calls. CLOCKS that depend on other sources (e.g. WWV or GPS) + * must supply functions here, even if the function just returns + * ENOSYS. The standard POSIX timer management code assumes the + * following: 1.) The k_itimer struct (sched.h) is used for the + * timer. 2.) The list, it_lock, it_clock, it_id and it_process + * fields are not modified by timer code. + * + * At this time all functions EXCEPT clock_nanosleep can be + * redirected by the CLOCKS structure. Clock_nanosleep is in + * there, but the code ignors it. + * + * Permissions: It is assumed that the clock_settime() function defined + * for each clock will take care of permission checks. Some + * clocks may be set able by any user (i.e. local process + * clocks) others not. Currently the only set able clock we + * have is CLOCK_REALTIME and its high res counter part, both of + * which we beg off on and pass to do_sys_settimeofday(). + */ + +struct k_clock posix_clocks[MAX_CLOCKS]; + +#define if_clock_do(clock_fun, alt_fun,parms) (! clock_fun)? alt_fun parms :\ + clock_fun parms + +#define p_timer_get( clock,a,b) if_clock_do((clock)->timer_get, \ + do_timer_gettime, \ + (a,b)) + +#define p_nsleep( clock,a,b,c) if_clock_do((clock)->nsleep, \ + do_nsleep, \ + (a,b,c)) + +#define p_timer_del( clock,a) if_clock_do((clock)->timer_del, \ + do_timer_delete, \ + (a)) + +void register_posix_clock(int clock_id, struct k_clock *new_clock); + +static int do_posix_gettime(struct k_clock *clock, struct timespec *tp); + +int do_posix_clock_monotonic_gettime(struct timespec *tp); + +int do_posix_clock_monotonic_settime(struct timespec *tp); +static struct k_itimer *lock_timer(timer_t timer_id, long *flags); +static inline void unlock_timer(struct k_itimer *timr, long flags); + +/* + * Initialize everything, well, just everything in Posix clocks/timers ;) + */ + +static __init int +init_posix_timers(void) +{ + struct k_clock clock_realtime = {.res = NSEC_PER_SEC / HZ }; + struct k_clock clock_monotonic = {.res = NSEC_PER_SEC / HZ, + .clock_get = do_posix_clock_monotonic_gettime, + .clock_set = do_posix_clock_monotonic_settime + }; + + register_posix_clock(CLOCK_REALTIME, &clock_realtime); + register_posix_clock(CLOCK_MONOTONIC, &clock_monotonic); + + posix_timers_cache = kmem_cache_create("posix_timers_cache", + sizeof (struct k_itimer), 0, 0, + 0, 0); + idr_init(&posix_timers_id); + return 0; +} + +__initcall(init_posix_timers); + +static inline int +tstojiffie(struct timespec *tp, int res, unsigned long *jiff) +{ + unsigned long sec = tp->tv_sec; + long nsec = tp->tv_nsec + res - 1; + + if (nsec > NSEC_PER_SEC) { + sec++; + nsec -= NSEC_PER_SEC; + } + + /* + * A note on jiffy overflow: It is possible for the system to + * have been up long enough for the jiffies quanity to overflow. + * In order for correct timer evaluations we require that the + * specified time be somewhere between now and now + (max + * unsigned int/2). Times beyond this will be truncated back to + * this value. This is done in the absolute adjustment code, + * below. Here it is enough to just discard the high order + * bits. + */ + *jiff = HZ * sec; + /* + * Do the res thing. (Don't forget the add in the declaration of nsec) + */ + nsec -= nsec % res; + /* + * Split to jiffie and sub jiffie + */ + *jiff += nsec / (NSEC_PER_SEC / HZ); + /* + * We trust that the optimizer will use the remainder from the + * above div in the following operation as long as they are close. + */ + return 0; +} +static void +tstotimer(struct itimerspec *time, struct k_itimer *timer) +{ + int res = posix_clocks[timer->it_clock].res; + tstojiffie(&time->it_value, res, &timer->it_timer.expires); + tstojiffie(&time->it_interval, res, &timer->it_incr); +} + +static void +schedule_next_timer(struct k_itimer *timr) +{ + struct now_struct now; + + /* Set up the timer for the next interval (if there is one) */ + if (timr->it_incr == 0) { + { + set_timer_inactive(timr); + return; + } + } + posix_get_now(&now); + while (posix_time_before(&timr->it_timer, &now)) { + posix_bump_timer(timr); + }; + timr->it_overrun_last = timr->it_overrun; + timr->it_overrun = -1; + timr->it_requeue_pending = 0; + add_timer(&timr->it_timer); +} + +/* + + * This function is exported for use by the signal deliver code. It is + * called just prior to the info block being released and passes that + * block to us. It's function is to update the overrun entry AND to + * restart the timer. It should only be called if the timer is to be + * restarted (i.e. we have flagged this in the sys_private entry of the + * info block). + * + * To protect aginst the timer going away while the interrupt is queued, + * we require that the it_requeue_pending flag be set. + + */ +void +do_schedule_next_timer(struct siginfo *info) +{ + + struct k_itimer *timr; + long flags; + + timr = lock_timer(info->si_tid, &flags); + + if (!timr || !timr->it_requeue_pending) + goto exit; + + schedule_next_timer(timr); + info->si_overrun = timr->it_overrun_last; + exit: + if (timr) + unlock_timer(timr, flags); +} + +/* + + * Notify the task and set up the timer for the next expiration (if + * applicable). This function requires that the k_itimer structure + * it_lock is taken. This code will requeue the timer only if we get + * either an error return or a flag (ret > 0) from send_seg_info + * indicating that the signal was either not queued or was queued + * without an info block. In this case, we will not get a call back to + * do_schedule_next_timer() so we do it here. This should be rare... + + */ + +static void +timer_notify_task(struct k_itimer *timr) +{ + struct siginfo info; + int ret; + + memset(&info, 0, sizeof (info)); + + /* Send signal to the process that owns this timer. */ + info.si_signo = timr->it_sigev_signo; + info.si_errno = 0; + info.si_code = SI_TIMER; + info.si_tid = timr->it_id; + info.si_value = timr->it_sigev_value; + if (timr->it_incr == 0) { + set_timer_inactive(timr); + } else { + timr->it_requeue_pending = info.si_sys_private = 1; + } + ret = send_sig_info(info.si_signo, &info, timr->it_process); + switch (ret) { + + default: + /* + * Signal was not sent. May or may not need to + * restart the timer. + */ + printk(KERN_WARNING "sending signal failed: %d\n", ret); + case 1: + /* + * signal was not sent because of sig_ignor or, + * possibly no queue memory OR will be sent but, + * we will not get a call back to restart it AND + * it should be restarted. + */ + schedule_next_timer(timr); + case 0: + /* + * all's well new signal queued + */ + break; + } +} + +/* + + * This function gets called when a POSIX.1b interval timer expires. It + * is used as a callback from the kernel internal timer. The + * run_timer_list code ALWAYS calls with interrutps on. + + */ +static void +posix_timer_fn(unsigned long __data) +{ + struct k_itimer *timr = (struct k_itimer *) __data; + long flags; + + spin_lock_irqsave(&timr->it_lock, flags); + timer_notify_task(timr); + unlock_timer(timr, flags); +} + +/* + * For some reason mips/mips64 define the SIGEV constants plus 128. + * Here we define a mask to get rid of the common bits. The + * optimizer should make this costless to all but mips. + */ +#if (ARCH == mips) || (ARCH == mips64) +#define MIPS_SIGEV ~(SIGEV_NONE & \ + SIGEV_SIGNAL & \ + SIGEV_THREAD & \ + SIGEV_THREAD_ID) +#else +#define MIPS_SIGEV (int)-1 +#endif + +static inline struct task_struct * +good_sigevent(sigevent_t * event) +{ + struct task_struct *rtn = current; + + if (event->sigev_notify & SIGEV_THREAD_ID & MIPS_SIGEV) { + if (!(rtn = + find_task_by_pid(event->sigev_notify_thread_id)) || + rtn->tgid != current->tgid) { + return NULL; + } + } + if (event->sigev_notify & SIGEV_SIGNAL & MIPS_SIGEV) { + if ((unsigned) (event->sigev_signo > SIGRTMAX)) + return NULL; + } + if (event->sigev_notify & ~(SIGEV_SIGNAL | SIGEV_THREAD_ID)) { + return NULL; + } + return rtn; +} + +void +register_posix_clock(int clock_id, struct k_clock *new_clock) +{ + if ((unsigned) clock_id >= MAX_CLOCKS) { + printk("POSIX clock register failed for clock_id %d\n", + clock_id); + return; + } + posix_clocks[clock_id] = *new_clock; +} + +static struct k_itimer * +alloc_posix_timer(void) +{ + struct k_itimer *tmr; + tmr = kmem_cache_alloc(posix_timers_cache, GFP_KERNEL); + memset(tmr, 0, sizeof (struct k_itimer)); + return (tmr); +} + +static void +release_posix_timer(struct k_itimer *tmr) +{ + if (tmr->it_id != -1){ + spin_lock_irq(&idr_lock); + idr_remove(&posix_timers_id, tmr->it_id); + spin_unlock_irq(&idr_lock); + } + kmem_cache_free(posix_timers_cache, tmr); +} + +/* Create a POSIX.1b interval timer. */ + +asmlinkage int +sys_timer_create(clockid_t which_clock, + struct sigevent *timer_event_spec, timer_t * created_timer_id) +{ + int error = 0; + struct k_itimer *new_timer = NULL; + timer_t new_timer_id; + struct task_struct *process = 0; + sigevent_t event; + + if ((unsigned) which_clock >= MAX_CLOCKS || + !posix_clocks[which_clock].res) return -EINVAL; + + new_timer = alloc_posix_timer(); + if (unlikely (new_timer == NULL)) + return -EAGAIN; + + spin_lock_init(&new_timer->it_lock); + do { + if ( unlikely ( !idr_pre_get(&posix_timers_id))){ + error = -EAGAIN; + new_timer_id = (timer_t)-1; + goto out; + } + spin_lock_irq(&idr_lock); + new_timer_id = (timer_t) idr_get_new( + &posix_timers_id, (void *) new_timer); + spin_unlock_irq(&idr_lock); + }while( unlikely (new_timer_id == -1)); + + new_timer->it_id = new_timer_id; + /* + * return the timer_id now. The next step is hard to + * back out if there is an error. + */ + if (copy_to_user(created_timer_id, + &new_timer_id, sizeof (new_timer_id))) { + error = -EFAULT; + goto out; + } + if (timer_event_spec) { + if (copy_from_user(&event, timer_event_spec, sizeof (event))) { + error = -EFAULT; + goto out; + } + read_lock(&tasklist_lock); + if ((process = good_sigevent(&event))) { + /* + + * We may be setting up this process for another + * thread. It may be exitiing. To catch this + * case the we check the PF_EXITING flag. If + * the flag is not set, the task_lock will catch + * him before it is too late (in exit_itimers). + + * The exec case is a bit more invloved but easy + * to code. If the process is in our thread + * group (and it must be or we would not allow + * it here) and is doing an exec, it will cause + * us to be killed. In this case it will wait + * for us to die which means we can finish this + * linkage with our last gasp. I.e. no code :) + + */ + task_lock(process); + if (!(process->flags & PF_EXITING)) { + list_add(&new_timer->list, + &process->posix_timers); + task_unlock(process); + } else { + task_unlock(process); + process = 0; + } + } + read_unlock(&tasklist_lock); + if (!process) { + error = -EINVAL; + goto out; + } + new_timer->it_sigev_notify = event.sigev_notify; + new_timer->it_sigev_signo = event.sigev_signo; + new_timer->it_sigev_value = event.sigev_value; + } else { + new_timer->it_sigev_notify = SIGEV_SIGNAL; + new_timer->it_sigev_signo = SIGALRM; + new_timer->it_sigev_value.sival_int = new_timer->it_id; + process = current; + task_lock(process); + list_add(&new_timer->list, &process->posix_timers); + task_unlock(process); + } + + new_timer->it_clock = which_clock; + new_timer->it_incr = 0; + new_timer->it_overrun = -1; + init_timer(&new_timer->it_timer); + new_timer->it_timer.expires = 0; + new_timer->it_timer.data = (unsigned long) new_timer; + new_timer->it_timer.function = posix_timer_fn; + set_timer_inactive(new_timer); + + /* + * Once we set the process, it can be found so do it last... + */ + new_timer->it_process = process; + + out: + if (error) { + release_posix_timer(new_timer); + } + return error; +} + +/* + * good_timespec + * + * This function checks the elements of a timespec structure. + * + * Arguments: + * ts : Pointer to the timespec structure to check + * + * Return value: + * If a NULL pointer was passed in, or the tv_nsec field was less than 0 + * or greater than NSEC_PER_SEC, or the tv_sec field was less than 0, + * this function returns 0. Otherwise it returns 1. + + */ + +static int +good_timespec(const struct timespec *ts) +{ + if ((ts == NULL) || + (ts->tv_sec < 0) || + ((unsigned) ts->tv_nsec >= NSEC_PER_SEC)) return 0; + return 1; +} + +static inline void +unlock_timer(struct k_itimer *timr, long flags) +{ + spin_unlock_irqrestore(&timr->it_lock, flags); +} + +/* + + * Locking issues: We need to protect the result of the id look up until + * we get the timer locked down so it is not deleted under us. The + * removal is done under the idr spinlock so we use that here to bridge + * the find to the timer lock. To avoid a dead lock, the timer id MUST + * be release with out holding the timer lock. + + */ +static struct k_itimer * +lock_timer(timer_t timer_id, long *flags) +{ + struct k_itimer *timr; + /* + * Watch out here. We do a irqsave on the idr_lock and pass the + * flags part over to the timer lock. Must not let interrupts in + * while we are moving the lock. + */ + + spin_lock_irqsave(&idr_lock, *flags); + timr = (struct k_itimer *) idr_find(&posix_timers_id, (int) timer_id); + if (timr) { + spin_lock(&timr->it_lock); + spin_unlock(&idr_lock); + + if ( (timr->it_id != timer_id) || !(timr->it_process) || + timr->it_process->tgid != current->tgid) { + unlock_timer(timr, *flags); + timr = NULL; + } + } else { + spin_unlock_irqrestore(&idr_lock, *flags); + } + + return timr; +} + +/* + + * Get the time remaining on a POSIX.1b interval timer. This function + * is ALWAYS called with spin_lock_irq on the timer, thus it must not + * mess with irq. + + * We have a couple of messes to clean up here. First there is the case + * of a timer that has a requeue pending. These timers should appear to + * be in the timer list with an expiry as if we were to requeue them + * now. + + * The second issue is the SIGEV_NONE timer which may be active but is + * not really ever put in the timer list (to save system resources). + * This timer may be expired, and if so, we will do it here. Otherwise + * it is the same as a requeue pending timer WRT to what we should + * report. + + */ +void inline +do_timer_gettime(struct k_itimer *timr, struct itimerspec *cur_setting) +{ + long sub_expires; + unsigned long expires; + struct now_struct now; + + do { + expires = timr->it_timer.expires; + } while ((volatile long) (timr->it_timer.expires) != expires); + + posix_get_now(&now); + + if (expires && (timr->it_sigev_notify & SIGEV_NONE) && !timr->it_incr) { + if (posix_time_before(&timr->it_timer, &now)) { + timr->it_timer.expires = expires = 0; + } + } + if (expires) { + if (timr->it_requeue_pending || + (timr->it_sigev_notify & SIGEV_NONE)) { + while (posix_time_before(&timr->it_timer, &now)) { + posix_bump_timer(timr); + }; + } else { + if (!timer_pending(&timr->it_timer)) { + sub_expires = expires = 0; + } + } + if (expires) { + expires -= now.jiffies; + } + } + jiffies_to_timespec(expires, &cur_setting->it_value); + jiffies_to_timespec(timr->it_incr, &cur_setting->it_interval); + + if (cur_setting->it_value.tv_sec < 0) { + cur_setting->it_value.tv_nsec = 1; + cur_setting->it_value.tv_sec = 0; + } +} +/* Get the time remaining on a POSIX.1b interval timer. */ +asmlinkage int +sys_timer_gettime(timer_t timer_id, struct itimerspec *setting) +{ + struct k_itimer *timr; + struct itimerspec cur_setting; + long flags; + + timr = lock_timer(timer_id, &flags); + if (!timr) + return -EINVAL; + + p_timer_get(&posix_clocks[timr->it_clock], timr, &cur_setting); + + unlock_timer(timr, flags); + + if (copy_to_user(setting, &cur_setting, sizeof (cur_setting))) + return -EFAULT; + + return 0; +} +/* + + * Get the number of overruns of a POSIX.1b interval timer. This is to + * be the overrun of the timer last delivered. At the same time we are + * accumulating overruns on the next timer. The overrun is frozen when + * the signal is delivered, either at the notify time (if the info block + * is not queued) or at the actual delivery time (as we are informed by + * the call back to do_schedule_next_timer(). So all we need to do is + * to pick up the frozen overrun. + + */ + +asmlinkage int +sys_timer_getoverrun(timer_t timer_id) +{ + struct k_itimer *timr; + int overrun; + long flags; + + timr = lock_timer(timer_id, &flags); + if (!timr) + return -EINVAL; + + overrun = timr->it_overrun_last; + unlock_timer(timr, flags); + + return overrun; +} +/* Adjust for absolute time */ +/* + * If absolute time is given and it is not CLOCK_MONOTONIC, we need to + * adjust for the offset between the timer clock (CLOCK_MONOTONIC) and + * what ever clock he is using. + * + * If it is relative time, we need to add the current (CLOCK_MONOTONIC) + * time to it to get the proper time for the timer. + */ +static int +adjust_abs_time(struct k_clock *clock, struct timespec *tp, int abs) +{ + struct timespec now; + struct timespec oc; + do_posix_clock_monotonic_gettime(&now); + + if (abs && + (posix_clocks[CLOCK_MONOTONIC].clock_get == clock->clock_get)) { + } else { + + if (abs) { + do_posix_gettime(clock, &oc); + } else { + oc.tv_nsec = oc.tv_sec = 0; + } + tp->tv_sec += now.tv_sec - oc.tv_sec; + tp->tv_nsec += now.tv_nsec - oc.tv_nsec; + + /* + * Normalize... + */ + if ((tp->tv_nsec - NSEC_PER_SEC) >= 0) { + tp->tv_nsec -= NSEC_PER_SEC; + tp->tv_sec++; + } + if ((tp->tv_nsec) < 0) { + tp->tv_nsec += NSEC_PER_SEC; + tp->tv_sec--; + } + } + /* + * Check if the requested time is prior to now (if so set now) or + * is more than the timer code can handle (if so we error out). + * The (unsigned) catches the case of prior to "now" with the same + * test. Only on failure do we sort out what happened, and then + * we use the (unsigned) to error out negative seconds. + */ + if ((unsigned) (tp->tv_sec - now.tv_sec) > (MAX_JIFFY_OFFSET / HZ)) { + if ((unsigned) tp->tv_sec < now.tv_sec) { + tp->tv_sec = now.tv_sec; + tp->tv_nsec = now.tv_nsec; + } else { + // tp->tv_sec = now.tv_sec + (MAX_JIFFY_OFFSET / HZ); + /* + * This is a considered response, not exactly in + * line with the standard (in fact it is silent on + * possible overflows). We assume such a large + * value is ALMOST always a programming error and + * try not to compound it by setting a really dumb + * value. + */ + return -EINVAL; + } + } + return 0; +} + +/* Set a POSIX.1b interval timer. */ +/* timr->it_lock is taken. */ +static inline int +do_timer_settime(struct k_itimer *timr, int flags, + struct itimerspec *new_setting, struct itimerspec *old_setting) +{ + struct k_clock *clock = &posix_clocks[timr->it_clock]; + + if (old_setting) { + do_timer_gettime(timr, old_setting); + } + + /* disable the timer */ + timr->it_incr = 0; + /* + * careful here. If smp we could be in the "fire" routine which will + * be spinning as we hold the lock. But this is ONLY an SMP issue. + */ +#ifdef CONFIG_SMP + if (timer_active(timr) && !del_timer(&timr->it_timer)) { + /* + * It can only be active if on an other cpu. Since + * we have cleared the interval stuff above, it should + * clear once we release the spin lock. Of course once + * we do that anything could happen, including the + * complete melt down of the timer. So return with + * a "retry" exit status. + */ + return TIMER_RETRY; + } + set_timer_inactive(timr); +#else + del_timer(&timr->it_timer); +#endif + timr->it_requeue_pending = 0; + timr->it_overrun_last = 0; + timr->it_overrun = -1; + /* + *switch off the timer when it_value is zero + */ + if ((new_setting->it_value.tv_sec == 0) && + (new_setting->it_value.tv_nsec == 0)) { + timr->it_timer.expires = 0; + return 0; + } + + if ((flags & TIMER_ABSTIME) && + (clock->clock_get != do_posix_clock_monotonic_gettime)) { + } + if (adjust_abs_time(clock, + &new_setting->it_value, flags & TIMER_ABSTIME)) { + return -EINVAL; + } + tstotimer(new_setting, timr); + + /* + * For some reason the timer does not fire immediately if expires is + * equal to jiffies, so the timer notify function is called directly. + * We do not even queue SIGEV_NONE timers! + */ + if (!(timr->it_sigev_notify & SIGEV_NONE)) { + if (timr->it_timer.expires == jiffies) { + timer_notify_task(timr); + } else + add_timer(&timr->it_timer); + } + return 0; +} + +/* Set a POSIX.1b interval timer */ +asmlinkage int +sys_timer_settime(timer_t timer_id, int flags, + const struct itimerspec *new_setting, + struct itimerspec *old_setting) +{ + struct k_itimer *timr; + struct itimerspec new_spec, old_spec; + int error = 0; + long flag; + struct itimerspec *rtn = old_setting ? &old_spec : NULL; + + if (new_setting == NULL) { + return -EINVAL; + } + + if (copy_from_user(&new_spec, new_setting, sizeof (new_spec))) { + return -EFAULT; + } + + if ((!good_timespec(&new_spec.it_interval)) || + (!good_timespec(&new_spec.it_value))) { + return -EINVAL; + } + retry: + timr = lock_timer(timer_id, &flag); + if (!timr) + return -EINVAL; + + if (!posix_clocks[timr->it_clock].timer_set) { + error = do_timer_settime(timr, flags, &new_spec, rtn); + } else { + error = posix_clocks[timr->it_clock].timer_set(timr, + flags, + &new_spec, rtn); + } + unlock_timer(timr, flag); + if (error == TIMER_RETRY) { + rtn = NULL; // We already got the old time... + goto retry; + } + + if (old_setting && !error) { + if (copy_to_user(old_setting, &old_spec, sizeof (old_spec))) { + error = -EFAULT; + } + } + + return error; +} + +static inline int +do_timer_delete(struct k_itimer *timer) +{ + timer->it_incr = 0; +#ifdef CONFIG_SMP + if (timer_active(timer) && + !del_timer(&timer->it_timer) && !timer->it_requeue_pending) { + /* + * It can only be active if on an other cpu. Since + * we have cleared the interval stuff above, it should + * clear once we release the spin lock. Of course once + * we do that anything could happen, including the + * complete melt down of the timer. So return with + * a "retry" exit status. + */ + return TIMER_RETRY; + } +#else + del_timer(&timer->it_timer); +#endif + return 0; +} + +/* Delete a POSIX.1b interval timer. */ +asmlinkage int +sys_timer_delete(timer_t timer_id) +{ + struct k_itimer *timer; + long flags; + +#ifdef CONFIG_SMP + int error; + retry_delete: +#endif + + timer = lock_timer(timer_id, &flags); + if (!timer) + return -EINVAL; + +#ifdef CONFIG_SMP + error = p_timer_del(&posix_clocks[timer->it_clock], timer); + + if (error == TIMER_RETRY) { + unlock_timer(timer, flags); + goto retry_delete; + } +#else + p_timer_del(&posix_clocks[timer->it_clock], timer); +#endif + + task_lock(timer->it_process); + + list_del(&timer->list); + + task_unlock(timer->it_process); + + /* + * This keeps any tasks waiting on the spin lock from thinking + * they got something (see the lock code above). + */ + timer->it_process = NULL; + unlock_timer(timer, flags); + release_posix_timer(timer); + return 0; +} +/* + * return timer owned by the process, used by exit_itimers + */ +static inline void +itimer_delete(struct k_itimer *timer) +{ + if (sys_timer_delete(timer->it_id)) { + BUG(); + } +} +/* + * This is exported to exit and exec + */ +void +exit_itimers(struct task_struct *tsk) +{ + struct k_itimer *tmr; + + task_lock(tsk); + while (!list_empty(&tsk->posix_timers)) { + tmr = list_entry(tsk->posix_timers.next, struct k_itimer, list); + task_unlock(tsk); + itimer_delete(tmr); + task_lock(tsk); + } + task_unlock(tsk); +} + +/* + * And now for the "clock" calls + + * These functions are called both from timer functions (with the timer + * spin_lock_irq() held and from clock calls with no locking. They must + * use the save flags versions of locks. + */ +static int +do_posix_gettime(struct k_clock *clock, struct timespec *tp) +{ + + if (clock->clock_get) { + return clock->clock_get(tp); + } + + do_gettimeofday((struct timeval *) tp); + tp->tv_nsec *= NSEC_PER_USEC; + return 0; +} + +/* + * We do ticks here to avoid the irq lock ( they take sooo long). + * The seqlock is great here. Since we a reader, we don't really care + * if we are interrupted since we don't take lock that will stall us or + * any other cpu. Voila, no irq lock is needed. + + * Note also that the while loop assures that the sub_jiff_offset + * will be less than a jiffie, thus no need to normalize the result. + * Well, not really, if called with ints off :( + */ + +int +do_posix_clock_monotonic_gettime(struct timespec *tp) +{ + long sub_sec; + u64 jiffies_64_f; + +#if (BITS_PER_LONG > 32) + + jiffies_64_f = jiffies_64; + +#else + unsigned int seq; + + do { + seq = read_seqbegin(&xtime_lock); + jiffies_64_f = jiffies_64; + + }while( read_seqretry(&xtime_lock, seq)); + +#endif + tp->tv_sec = div_long_long_rem(jiffies_64_f, HZ, &sub_sec); + + tp->tv_nsec = sub_sec * (NSEC_PER_SEC / HZ); + return 0; +} + +int +do_posix_clock_monotonic_settime(struct timespec *tp) +{ + return -EINVAL; +} + +asmlinkage int +sys_clock_settime(clockid_t which_clock, const struct timespec *tp) +{ + struct timespec new_tp; + + if ((unsigned) which_clock >= MAX_CLOCKS || + !posix_clocks[which_clock].res) return -EINVAL; + if (copy_from_user(&new_tp, tp, sizeof (*tp))) + return -EFAULT; + if (posix_clocks[which_clock].clock_set) { + return posix_clocks[which_clock].clock_set(&new_tp); + } + new_tp.tv_nsec /= NSEC_PER_USEC; + return do_sys_settimeofday((struct timeval *) &new_tp, NULL); +} +asmlinkage int +sys_clock_gettime(clockid_t which_clock, struct timespec *tp) +{ + struct timespec rtn_tp; + int error = 0; + + if ((unsigned) which_clock >= MAX_CLOCKS || + !posix_clocks[which_clock].res) return -EINVAL; + + error = do_posix_gettime(&posix_clocks[which_clock], &rtn_tp); + + if (!error) { + if (copy_to_user(tp, &rtn_tp, sizeof (rtn_tp))) { + error = -EFAULT; + } + } + return error; + +} +asmlinkage int +sys_clock_getres(clockid_t which_clock, struct timespec *tp) +{ + struct timespec rtn_tp; + + if ((unsigned) which_clock >= MAX_CLOCKS || + !posix_clocks[which_clock].res) return -EINVAL; + + rtn_tp.tv_sec = 0; + rtn_tp.tv_nsec = posix_clocks[which_clock].res; + if (tp) { + if (copy_to_user(tp, &rtn_tp, sizeof (rtn_tp))) { + return -EFAULT; + } + } + return 0; + +} +static void +nanosleep_wake_up(unsigned long __data) +{ + struct task_struct *p = (struct task_struct *) __data; + + wake_up_process(p); +} + +/* + * The standard says that an absolute nanosleep call MUST wake up at + * the requested time in spite of clock settings. Here is what we do: + * For each nanosleep call that needs it (only absolute and not on + * CLOCK_MONOTONIC* (as it can not be set)) we thread a little structure + * into the "nanosleep_abs_list". All we need is the task_struct pointer. + * When ever the clock is set we just wake up all those tasks. The rest + * is done by the while loop in clock_nanosleep(). + + * On locking, clock_was_set() is called from update_wall_clock which + * holds (or has held for it) a write_lock_irq( xtime_lock) and is + * called from the timer bh code. Thus we need the irq save locks. + */ +spinlock_t nanosleep_abs_list_lock = SPIN_LOCK_UNLOCKED; + +struct list_head nanosleep_abs_list = LIST_HEAD_INIT(nanosleep_abs_list); + +struct abs_struct { + struct list_head list; + struct task_struct *t; +}; + +void +clock_was_set(void) +{ + struct list_head *pos; + unsigned long flags; + + spin_lock_irqsave(&nanosleep_abs_list_lock, flags); + list_for_each(pos, &nanosleep_abs_list) { + wake_up_process(list_entry(pos, struct abs_struct, list)->t); + } + spin_unlock_irqrestore(&nanosleep_abs_list_lock, flags); +} + +long clock_nanosleep_restart(struct restart_block *restart_block); + +extern long do_clock_nanosleep(clockid_t which_clock, int flags, + struct timespec *t); + +#ifdef FOLD_NANO_SLEEP_INTO_CLOCK_NANO_SLEEP + +asmlinkage long +sys_nanosleep(struct timespec *rqtp, struct timespec *rmtp) +{ + struct timespec t; + long ret; + + if (copy_from_user(&t, rqtp, sizeof (t))) + return -EFAULT; + + if ((unsigned) t.tv_nsec >= NSEC_PER_SEC || t.tv_sec < 0) + return -EINVAL; + + ret = do_clock_nanosleep(CLOCK_REALTIME, 0, &t); + + if (ret == -ERESTART_RESTARTBLOCK && rmtp && + copy_to_user(rmtp, &t, sizeof (t))) + return -EFAULT; + return ret; +} +#endif // ! FOLD_NANO_SLEEP_INTO_CLOCK_NANO_SLEEP + +asmlinkage long +sys_clock_nanosleep(clockid_t which_clock, int flags, + const struct timespec *rqtp, struct timespec *rmtp) +{ + struct timespec t; + int ret; + + if ((unsigned) which_clock >= MAX_CLOCKS || + !posix_clocks[which_clock].res) return -EINVAL; + + if (copy_from_user(&t, rqtp, sizeof (struct timespec))) + return -EFAULT; + + if ((unsigned) t.tv_nsec >= NSEC_PER_SEC || t.tv_sec < 0) + return -EINVAL; + + ret = do_clock_nanosleep(which_clock, flags, &t); + + if ((ret == -ERESTART_RESTARTBLOCK) && rmtp && + copy_to_user(rmtp, &t, sizeof (t))) + return -EFAULT; + return ret; + +} + +long +do_clock_nanosleep(clockid_t which_clock, int flags, struct timespec *tsave) +{ + struct timespec t; + struct timer_list new_timer; + struct abs_struct abs_struct = { list:{next:0} }; + int abs; + int rtn = 0; + int active; + struct restart_block *restart_block = + ¤t_thread_info()->restart_block; + + init_timer(&new_timer); + new_timer.expires = 0; + new_timer.data = (unsigned long) current; + new_timer.function = nanosleep_wake_up; + abs = flags & TIMER_ABSTIME; + + if (restart_block->fn == clock_nanosleep_restart) { + /* + * Interrupted by a non-delivered signal, pick up remaining + * time and continue. + */ + restart_block->fn = do_no_restart_syscall; + if (!restart_block->arg2) + return -EINTR; + + new_timer.expires = restart_block->arg2; + if (time_before(new_timer.expires, jiffies)) + return 0; + } + + if (abs && (posix_clocks[which_clock].clock_get != + posix_clocks[CLOCK_MONOTONIC].clock_get)) { + spin_lock_irq(&nanosleep_abs_list_lock); + list_add(&abs_struct.list, &nanosleep_abs_list); + abs_struct.t = current; + spin_unlock_irq(&nanosleep_abs_list_lock); + } + do { + t = *tsave; + if ((abs || !new_timer.expires) && + !(rtn = adjust_abs_time(&posix_clocks[which_clock], + &t, abs))) { + /* + * On error, we don't set up the timer so + * we don't arm the timer so + * del_timer_sync() will return 0, thus + * active is zero... and so it goes. + */ + + tstojiffie(&t, + posix_clocks[which_clock].res, + &new_timer.expires); + } + if (new_timer.expires) { + current->state = TASK_INTERRUPTIBLE; + add_timer(&new_timer); + + schedule(); + } + } + while ((active = del_timer_sync(&new_timer)) && + !test_thread_flag(TIF_SIGPENDING)); + + if (abs_struct.list.next) { + spin_lock_irq(&nanosleep_abs_list_lock); + list_del(&abs_struct.list); + spin_unlock_irq(&nanosleep_abs_list_lock); + } + if (active) { + unsigned long jiffies_f = jiffies; + + /* + * Always restart abs calls from scratch to pick up any + * clock shifting that happened while we are away. + */ + if (abs) + return -ERESTARTNOHAND; + + jiffies_to_timespec(new_timer.expires - jiffies_f, tsave); + + while (tsave->tv_nsec < 0) { + tsave->tv_nsec += NSEC_PER_SEC; + tsave->tv_sec--; + } + if (tsave->tv_sec < 0) { + tsave->tv_sec = 0; + tsave->tv_nsec = 1; + } + restart_block->fn = clock_nanosleep_restart; + restart_block->arg0 = which_clock; + restart_block->arg1 = (int)tsave; + restart_block->arg2 = new_timer.expires; + return -ERESTART_RESTARTBLOCK; + } + + return rtn; +} +/* + * This will restart either clock_nanosleep or clock_nanosleep + */ +long +clock_nanosleep_restart(struct restart_block *restart_block) +{ + struct timespec t; + int ret = do_clock_nanosleep(restart_block->arg0, 0, &t); + + if ((ret == -ERESTART_RESTARTBLOCK) && restart_block->arg1 && + copy_to_user((struct timespec *)(restart_block->arg1), &t, + sizeof (t))) + return -EFAULT; + return ret; +} diff --git a/kernel/signal.c b/kernel/signal.c index b7ac6a557ddb..f232baae6fd8 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -472,8 +472,6 @@ static int __dequeue_signal(struct sigpending *pending, sigset_t *mask, if (!collect_signal(sig, pending, info)) sig = 0; - /* XXX: Once POSIX.1b timers are in, if si_code == SI_TIMER, - we need to xchg out the timer overrun values. */ } recalc_sigpending(); @@ -492,6 +490,11 @@ int dequeue_signal(struct task_struct *tsk, sigset_t *mask, siginfo_t *info) if (!signr) signr = __dequeue_signal(&tsk->signal->shared_pending, mask, info); + if ( signr && + ((info->si_code & __SI_MASK) == __SI_TIMER) && + info->si_sys_private){ + do_schedule_next_timer(info); + } return signr; } @@ -677,6 +680,7 @@ static void handle_stop_signal(int sig, struct task_struct *p) static int send_signal(int sig, struct siginfo *info, struct sigpending *signals) { struct sigqueue * q = NULL; + int ret = 0; /* * fast-pathed signals for kernel-internal things like SIGSTOP @@ -720,17 +724,25 @@ static int send_signal(int sig, struct siginfo *info, struct sigpending *signals copy_siginfo(&q->info, info); break; } - } else if (sig >= SIGRTMIN && info && (unsigned long)info != 1 + } else { + if (sig >= SIGRTMIN && info && (unsigned long)info != 1 && info->si_code != SI_USER) /* * Queue overflow, abort. We may abort if the signal was rt * and sent by user using something other than kill(). */ - return -EAGAIN; + return -EAGAIN; + if (((unsigned long)info > 1) && (info->si_code == SI_TIMER)) + /* + * Set up a return to indicate that we dropped + * the signal. + */ + ret = info->si_sys_private; + } out_set: sigaddset(&signals->signal, sig); - return 0; + return ret; } #define LEGACY_QUEUE(sigptr, sig) \ @@ -749,20 +761,26 @@ specific_send_sig_info(int sig, struct siginfo *info, struct task_struct *t) BUG(); #endif + if (((unsigned long)info > 2) && (info->si_code == SI_TIMER)) + /* + * Set up a return to indicate that we dropped the signal. + */ + ret = info->si_sys_private; + /* Short-circuit ignored signals. */ if (sig_ignored(t, sig)) - return 0; + goto out; /* Support queueing exactly one non-rt signal, so that we can get more detailed information about the cause of the signal. */ if (LEGACY_QUEUE(&t->pending, sig)) - return 0; + goto out; ret = send_signal(sig, info, &t->pending); if (!ret && !sigismember(&t->blocked, sig)) signal_wake_up(t, sig == SIGKILL); - +out: return ret; } @@ -821,7 +839,7 @@ __group_send_sig_info(int sig, struct siginfo *info, struct task_struct *p) { struct task_struct *t; unsigned int mask; - int ret; + int ret = 0; #if CONFIG_SMP if (!spin_is_locked(&p->sighand->siglock)) @@ -829,13 +847,19 @@ __group_send_sig_info(int sig, struct siginfo *info, struct task_struct *p) #endif handle_stop_signal(sig, p); + if (((unsigned long)info > 2) && (info->si_code == SI_TIMER)) + /* + * Set up a return to indicate that we dropped the signal. + */ + ret = info->si_sys_private; + /* Short-circuit ignored signals. */ if (sig_ignored(p, sig)) - return 0; + return ret; if (LEGACY_QUEUE(&p->signal->shared_pending, sig)) /* This is a non-RT signal and we already have one queued. */ - return 0; + return ret; /* * Don't bother zombies and stopped tasks (but @@ -1322,6 +1346,7 @@ do_notify_parent_cldstop(struct task_struct *tsk, struct task_struct *parent) static void finish_stop(int stop_count) { + int ret; /* * If there are no other threads in the group, or if there is * a group stop in progress and we are the last to stop, @@ -1753,8 +1778,9 @@ int copy_siginfo_to_user(siginfo_t *to, siginfo_t *from) err |= __put_user(from->si_uid, &to->si_uid); break; case __SI_TIMER: - err |= __put_user(from->si_timer1, &to->si_timer1); - err |= __put_user(from->si_timer2, &to->si_timer2); + err |= __put_user(from->si_tid, &to->si_tid); + err |= __put_user(from->si_overrun, &to->si_overrun); + err |= __put_user(from->si_ptr, &to->si_ptr); break; case __SI_POLL: err |= __put_user(from->si_band, &to->si_band); diff --git a/kernel/timer.c b/kernel/timer.c index 2c297124b6d9..b94c6fd8485c 100644 --- a/kernel/timer.c +++ b/kernel/timer.c @@ -52,12 +52,11 @@ typedef struct tvec_root_s { struct list_head vec[TVR_SIZE]; } tvec_root_t; -typedef struct timer_list timer_t; struct tvec_t_base_s { spinlock_t lock; unsigned long timer_jiffies; - timer_t *running_timer; + struct timer_list *running_timer; tvec_root_t tv1; tvec_t tv2; tvec_t tv3; @@ -70,7 +69,7 @@ typedef struct tvec_t_base_s tvec_base_t; /* Fake initialization */ static DEFINE_PER_CPU(tvec_base_t, tvec_bases) = { SPIN_LOCK_UNLOCKED }; -static void check_timer_failed(timer_t *timer) +static void check_timer_failed(struct timer_list *timer) { static int whine_count; if (whine_count < 16) { @@ -88,13 +87,13 @@ static void check_timer_failed(timer_t *timer) timer->magic = TIMER_MAGIC; } -static inline void check_timer(timer_t *timer) +static inline void check_timer(struct timer_list *timer) { if (timer->magic != TIMER_MAGIC) check_timer_failed(timer); } -static inline void internal_add_timer(tvec_base_t *base, timer_t *timer) +static inline void internal_add_timer(tvec_base_t *base, struct timer_list *timer) { unsigned long expires = timer->expires; unsigned long idx = expires - base->timer_jiffies; @@ -146,7 +145,7 @@ static inline void internal_add_timer(tvec_base_t *base, timer_t *timer) * Timers with an ->expired field in the past will be executed in the next * timer tick. It's illegal to add an already pending timer. */ -void add_timer(timer_t *timer) +void add_timer(struct timer_list *timer) { int cpu = get_cpu(); tvec_base_t *base = &per_cpu(tvec_bases, cpu); @@ -204,7 +203,7 @@ void add_timer_on(struct timer_list *timer, int cpu) * (ie. mod_timer() of an inactive timer returns 0, mod_timer() of an * active timer returns 1.) */ -int mod_timer(timer_t *timer, unsigned long expires) +int mod_timer(struct timer_list *timer, unsigned long expires) { tvec_base_t *old_base, *new_base; unsigned long flags; @@ -281,7 +280,7 @@ repeat: * (ie. del_timer() of an inactive timer returns 0, del_timer() of an * active timer returns 1.) */ -int del_timer(timer_t *timer) +int del_timer(struct timer_list *timer) { unsigned long flags; tvec_base_t *base; @@ -320,7 +319,7 @@ repeat: * * The function returns whether it has deactivated a pending timer or not. */ -int del_timer_sync(timer_t *timer) +int del_timer_sync(struct timer_list *timer) { tvec_base_t *base; int i, ret = 0; @@ -363,9 +362,9 @@ static int cascade(tvec_base_t *base, tvec_t *tv) * detach them individually, just clear the list afterwards. */ while (curr != head) { - timer_t *tmp; + struct timer_list *tmp; - tmp = list_entry(curr, timer_t, entry); + tmp = list_entry(curr, struct timer_list, entry); if (tmp->base != base) BUG(); next = curr->next; @@ -404,9 +403,9 @@ repeat: if (curr != head) { void (*fn)(unsigned long); unsigned long data; - timer_t *timer; + struct timer_list *timer; - timer = list_entry(curr, timer_t, entry); + timer = list_entry(curr, struct timer_list, entry); fn = timer->function; data = timer->data; @@ -508,6 +507,7 @@ static void second_overflow(void) if (xtime.tv_sec % 86400 == 0) { xtime.tv_sec--; time_state = TIME_OOP; + clock_was_set(); printk(KERN_NOTICE "Clock: inserting leap second 23:59:60 UTC\n"); } break; @@ -516,6 +516,7 @@ static void second_overflow(void) if ((xtime.tv_sec + 1) % 86400 == 0) { xtime.tv_sec++; time_state = TIME_WAIT; + clock_was_set(); printk(KERN_NOTICE "Clock: deleting leap second 23:59:59 UTC\n"); } break; @@ -968,7 +969,7 @@ static void process_timeout(unsigned long __data) */ signed long schedule_timeout(signed long timeout) { - timer_t timer; + struct timer_list timer; unsigned long expire; switch (timeout) @@ -1023,6 +1024,7 @@ asmlinkage long sys_gettid(void) { return current->pid; } +#ifndef FOLD_NANO_SLEEP_INTO_CLOCK_NANO_SLEEP static long nanosleep_restart(struct restart_block *restart) { @@ -1081,6 +1083,7 @@ asmlinkage long sys_nanosleep(struct timespec *rqtp, struct timespec *rmtp) } return ret; } +#endif // ! FOLD_NANO_SLEEP_INTO_CLOCK_NANO_SLEEP /* * sys_sysinfo - fill in sysinfo struct |