user/sven/linux.git/include/linux/kernel.h, branch v5.4.43

kernel.h: Add non_block_start/end()

2019-09-07T07:28:05Z

In some special cases we must not block, but there's not a spinlock, preempt-off, irqs-off or similar critical section already that arms the might_sleep() debug checks. Add a non_block_start/end() pair to annotate these. This will be used in the oom paths of mmu-notifiers, where blocking is not allowed to make sure there's forward progress. Quoting Michal: "The notifier is called from quite a restricted context - oom_reaper - which shouldn't depend on any locks or sleepable conditionals. The code should be swift as well but we mostly do care about it to make a forward progress. Checking for sleepable context is the best thing we could come up with that would describe these demands at least partially." Peter also asked whether we want to catch spinlocks on top, but Michal said those are less of a problem because spinlocks can't have an indirect dependency upon the page allocator and hence close the loop with the oom reaper. Suggested by Michal Hocko. Link: https://lore.kernel.org/r/20190826201425.17547-4-daniel.vetter@ffwll.ch Acked-by: Christian König (v1) Acked-by: Peter Zijlstra (Intel) Signed-off-by: Daniel Vetter Acked-by: Michal Hocko Signed-off-by: Jason Gunthorpe

include/linux/kernel.h: add typeof_member() macro

2019-07-17T02:23:21Z

Add typeof_member() macro so that types can be extracted without introducing dummy variables. Link: http://lkml.kernel.org/r/20190529190720.GA5703@avx2 Signed-off-by: Alexey Dobriyan Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

linux/kernel.h: fix overflow for DIV_ROUND_UP_ULL

2019-06-29T08:43:45Z

DIV_ROUND_UP_ULL adds the two arguments and then invokes DIV_ROUND_DOWN_ULL. But on a 32bit system the addition of two 32 bit values can overflow. DIV_ROUND_DOWN_ULL does it correctly and stashes the addition into a unsigned long long so cast the result to unsigned long long here to avoid the overflow condition. [akpm@linux-foundation.org: DIV_ROUND_UP_ULL must be an rval] Link: http://lkml.kernel.org/r/20190625100518.30753-1-vkoul@kernel.org Signed-off-by: Vinod Koul Reviewed-by: Andrew Morton Cc: Bjorn Andersson Cc: Randy Dunlap Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

lib/math: move int_pow() from pwm_bl.c for wider use

2019-05-15T02:52:49Z

The integer exponentiation is used in few places and might be used in the future by other call sites. Move it to wider use. Link: http://lkml.kernel.org/r/20190323172531.80025-2-andriy.shevchenko@linux.intel.com Signed-off-by: Andy Shevchenko Cc: Daniel Thompson Cc: Lee Jones Cc: Ray Jui Cc: Thierry Reding Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

Merge tag 'v5.1-rc6' into for-5.2/block

2019-04-22T15:47:36Z

Pull in v5.1-rc6 to resolve two conflicts. One is in BFQ, in just a comment, and is trivial. The other one is a conflict due to a later fix in the bio multi-page work, and needs a bit more care. * tag 'v5.1-rc6': (770 commits) Linux 5.1-rc6 block: make sure that bvec length can't be overflow block: kill all_q_node in request_queue x86/cpu/intel: Lower the "ENERGY_PERF_BIAS: Set to normal" message's log priority coredump: fix race condition between mmget_not_zero()/get_task_mm() and core dumping mm/kmemleak.c: fix unused-function warning init: initialize jump labels before command line option parsing kernel/watchdog_hld.c: hard lockup message should end with a newline kcov: improve CONFIG_ARCH_HAS_KCOV help text mm: fix inactive list balancing between NUMA nodes and cgroups mm/hotplug: treat CMA pages as unmovable proc: fixup proc-pid-vm test proc: fix map_files test on F29 mm/vmstat.c: fix /proc/vmstat format for CONFIG_DEBUG_TLBFLUSH=y CONFIG_SMP=n mm/memory_hotplug: do not unlock after failing to take the device_hotplug_lock mm: swapoff: shmem_unuse() stop eviction without igrab() mm: swapoff: take notice of completion sooner mm: swapoff: remove too limiting SWAP_UNUSE_MAX_TRIES mm: swapoff: shmem_find_swap_entries() filter out other types slab: store tagged freelist for off-slab slabmgmt ... Signed-off-by: Jens Axboe

block: remove CONFIG_LBDAF

2019-04-06T16:48:35Z

Currently support for 64-bit sector_t and blkcnt_t is optional on 32-bit architectures. These types are required to support block device and/or file sizes larger than 2 TiB, and have generally defaulted to on for a long time. Enabling the option only increases the i386 tinyconfig size by 145 bytes, and many data structures already always use 64-bit values for their in-core and on-disk data structures anyway, so there should not be a large change in dynamic memory usage either. Dropping this option removes a somewhat weird non-default config that has cause various bugs or compiler warnings when actually used. Signed-off-by: Christoph Hellwig Signed-off-by: Jens Axboe

linux/kernel.h: Use parentheses around argument in u64_to_user_ptr()

2019-04-03T09:43:49Z

Use parentheses around uses of the argument in u64_to_user_ptr() to ensure that the cast doesn't apply to part of the argument. There are existing uses of the macro of the form u64_to_user_ptr(A + B) which expands to (void __user *)(uintptr_t)A + B (the cast applies to the first operand of the addition, the addition is a pointer addition). This happens to still work as intended, the semantic difference doesn't cause a difference in behavior. But I want to use u64_to_user_ptr() with a ternary operator in the argument, like so: u64_to_user_ptr(A ? B : C) This currently doesn't work as intended. Signed-off-by: Jann Horn Signed-off-by: Borislav Petkov Reviewed-by: Mukesh Ojha Cc: Andrei Vagin Cc: Andrew Morton Cc: Dan Carpenter Cc: Greg Kroah-Hartman Cc: "H. Peter Anvin" Cc: Ingo Molnar Cc: Jani Nikula Cc: Kees Cook Cc: Masahiro Yamada Cc: NeilBrown Cc: Peter Zijlstra Cc: Qiaowei Ren Cc: Thomas Gleixner Cc: x86-ml Link: https://lkml.kernel.org/r/20190329214652.258477-1-jannh@google.com

linux/kernel.h: split _MAX and _MIN macros into

2019-03-08T02:31:59Z

tends to be cluttered because we often put various sort of unrelated stuff in it. So, we have split out a sensible chunk of code into a separate header from time to time. This commit splits out the *_MAX and *_MIN defines. The standard header contains various MAX, MIN constants including numerial limits. [1] I think it makes sense to move in-kernel MAX, MIN constants into include/linux/limits.h. We already have include/uapi/linux/limits.h to contain some user-space constants. I changed its include guard to _UAPI_LINUX_LIMITS_H. This change has no impact to the user-space because scripts/headers_install.sh rips off the '_UAPI' prefix from the include guards of exported headers. [1] http://pubs.opengroup.org/onlinepubs/009604499/basedefs/limits.h.html Link: http://lkml.kernel.org/r/1549156242-20806-2-git-send-email-yamada.masahiro@socionext.com Signed-off-by: Masahiro Yamada Cc: Alex Elder Cc: Alexey Dobriyan Cc: Zhang Yanmin Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

linux/kernel.h: use 'short' to define USHRT_MAX, SHRT_MAX, SHRT_MIN

2019-03-08T02:31:59Z

The commit log of 44f564a4bf6a ("ipc: add definitions of USHORT_MAX and others") did not explain why it used (s16) and (u16) instead of (short) and (unsigned short). Let's use (short) and (unsigned short), which is more sensible, and more consistent with the other MAX/MIN defines. As you see in include/uapi/asm-generic/int-ll64.h, s16/u16 are typedef'ed as signed/unsigned short. So, this commit does not have a functional change. Remove the unneeded parentheses around ~0U while we are here. Link: http://lkml.kernel.org/r/1549156242-20806-1-git-send-email-yamada.masahiro@socionext.com Signed-off-by: Masahiro Yamada Cc: Alexey Dobriyan Cc: Zhang Yanmin Cc: Alex Elder Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

: drop the gcc-3.3 'const' hack in roundup()

2019-03-08T02:31:59Z

The single quotation marks around "const" were causing a documentation markup warning with reST. Instead of fixing that warning, just delete that comment line and the gcc-3.3 hack of using "const" in the roundup() macro since gcc-3.3 is no longer supported for kernel builds. I did around 20 different $arch builds with no problems, but we'll just have to see if this causes problems for anyone else out there. Link: http://lkml.kernel.org/r/ec5dcf72-7c3e-3513-af0c-4003ed598854@infradead.org Signed-off-by: Randy Dunlap Suggested-by: Matthew Wilcox Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

user/sven/linux.git/include/linux/kernel.h, branch v5.4.43

kernel.h: Add non_block_start/end()

include/linux/kernel.h: add typeof_member() macro

linux/kernel.h: fix overflow for DIV_ROUND_UP_ULL

lib/math: move int_pow() from pwm_bl.c for wider use

Merge tag 'v5.1-rc6' into for-5.2/block

block: remove CONFIG_LBDAF

linux/kernel.h: Use parentheses around argument in u64_to_user_ptr()

linux/kernel.h: split *_MAX and *_MIN macros into

linux/kernel.h: use 'short' to define USHRT_MAX, SHRT_MAX, SHRT_MIN

: drop the gcc-3.3 'const' hack in roundup()

linux/kernel.h: split _MAX and _MIN macros into