Commit 93387d49 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge tag 'tif-notify-signal-2023-01-06' of git://git.kernel.dk/linux 

Pull arm TIF_NOTIFY_SIGNAL fixup from Jens Axboe:
 "Hui Tang reported a performance regressions with _TIF_WORK_MASK in
  newer kernels, which he tracked to a change that went into 5.11. After
  this change, we'll call do_work_pending() more often than we need to,
  because we're now testing bits 0..15 rather than just 0..7.

  Shuffle the bits around to avoid this"

* tag 'tif-notify-signal-2023-01-06' of git://git.kernel.dk/linux:
  ARM: renumber bits related to _TIF_WORK_MASK
parents 5c1a712f 191f8453

arch/arm/include/asm/thread_info.h

+7 −6
Original line number Diff line number Diff line
@@ -128,15 +128,16 @@ extern int vfp_restore_user_hwstate(struct user_vfp *, 
#define TIF_NEED_RESCHED	1	/* rescheduling necessary */

#define TIF_NOTIFY_RESUME	2	/* callback before returning to user */

#define TIF_UPROBE		3	/* breakpointed or singlestepping */

#define TIF_SYSCALL_TRACE	4	/* syscall trace active */

#define TIF_SYSCALL_AUDIT	5	/* syscall auditing active */

#define TIF_SYSCALL_TRACEPOINT	6	/* syscall tracepoint instrumentation */

#define TIF_SECCOMP		7	/* seccomp syscall filtering active */

#define TIF_NOTIFY_SIGNAL	8	/* signal notifications exist */

#define TIF_NOTIFY_SIGNAL	4	/* signal notifications exist */



#define TIF_USING_IWMMXT	17

#define TIF_MEMDIE		18	/* is terminating due to OOM killer */

#define TIF_RESTORE_SIGMASK	20

#define TIF_RESTORE_SIGMASK	19

#define TIF_SYSCALL_TRACE	20	/* syscall trace active */

#define TIF_SYSCALL_AUDIT	21	/* syscall auditing active */

#define TIF_SYSCALL_TRACEPOINT	22	/* syscall tracepoint instrumentation */

#define TIF_SECCOMP		23	/* seccomp syscall filtering active */





#define _TIF_SIGPENDING		(1 << TIF_SIGPENDING)

#define _TIF_NEED_RESCHED	(1 << TIF_NEED_RESCHED)