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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
+7
-6
+7
-6
arch/arm/include/asm/thread_info.h
+7
-6
arch/arm/include/asm/thread_info.h
···
128
128
#define TIF_NEED_RESCHED 1 /* rescheduling necessary */
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129
#define TIF_NOTIFY_RESUME 2 /* callback before returning to user */
130
130
#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 */
136
132
137
133
#define TIF_USING_IWMMXT 17
138
134
#define TIF_MEMDIE 18 /* is terminating due to OOM killer */
139
-
#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 */
138
+
#define TIF_SYSCALL_TRACEPOINT 22 /* syscall tracepoint instrumentation */
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+
#define TIF_SECCOMP 23 /* seccomp syscall filtering active */
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+
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#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
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#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)