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| author |   Peter Zijlstra <peterz@infradead.org> | 2019-02-27 11:09:56 +0100 |
|---|---|---|
| committer |   Ingo Molnar <mingo@kernel.org> | 2019-06-17 12:43:44 +0200 |
| commit | 2234a6d3a28a971182cc91d5679e444516421de0 (patch) | |
| tree | bea8d20799cc102fe565c3c1c5ccc69802c7bbf6 /kernel | |
| parent | x86/percpu, sched/fair: Avoid local_clock() (diff) | |
| download | linux-dev-2234a6d3a28a971182cc91d5679e444516421de0.tar.xz linux-dev-2234a6d3a28a971182cc91d5679e444516421de0.zip | |
x86/percpu: Optimize raw_cpu_xchg()
Since raw_cpu_xchg() doesn't need to be IRQ-safe, like
this_cpu_xchg(), we can use a simple load-store instead of the cmpxchg
loop.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel')
0 files changed, 0 insertions, 0 deletions