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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
2 parents 5c1a712 + 191f845 commit 93387d4

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arch/arm/include/asm/thread_info.h

Lines changed: 7 additions & 6 deletions
Original file line numberDiff line numberDiff line change
@@ -128,15 +128,16 @@ extern int vfp_restore_user_hwstate(struct user_vfp *,
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#define TIF_NEED_RESCHED 1 /* rescheduling necessary */
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#define TIF_NOTIFY_RESUME 2 /* callback before returning to user */
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#define TIF_UPROBE 3 /* breakpointed or singlestepping */
131-
#define TIF_SYSCALL_TRACE 4 /* syscall trace active */
132-
#define TIF_SYSCALL_AUDIT 5 /* syscall auditing active */
133-
#define TIF_SYSCALL_TRACEPOINT 6 /* syscall tracepoint instrumentation */
134-
#define TIF_SECCOMP 7 /* seccomp syscall filtering active */
135-
#define TIF_NOTIFY_SIGNAL 8 /* signal notifications exist */
131+
#define TIF_NOTIFY_SIGNAL 4 /* signal notifications exist */
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#define TIF_USING_IWMMXT 17
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#define TIF_MEMDIE 18 /* is terminating due to OOM killer */
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#define TIF_RESTORE_SIGMASK 20
135+
#define TIF_RESTORE_SIGMASK 19
136+
#define TIF_SYSCALL_TRACE 20 /* syscall trace active */
137+
#define TIF_SYSCALL_AUDIT 21 /* syscall auditing active */
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#define TIF_SYSCALL_TRACEPOINT 22 /* syscall tracepoint instrumentation */
139+
#define TIF_SECCOMP 23 /* seccomp syscall filtering active */
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#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
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#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)

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