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| author | Uros Bizjak <ubizjak@gmail.com> | 2023-11-23 21:34:23 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2023-11-30 20:25:09 +0100 |
| commit | 9e9d673b2c84719937db5d6ab1d8cbcd7d45e974 (patch) | |
| tree | a258dea9e23cb10d51a214f04b4d03ef019aa0dc /tools/perf/scripts/python/export-to-sqlite.py | |
| parent | 9d1c8f21533729b6ead531b676fa7d327cf00819 (diff) | |
x86/smp: Use atomic_try_cmpxchg in native_stop_other_cpus()
Use atomic_try_cmpxchg() instead of atomic_cmpxchg(*ptr, old, new) == old.
X86 CMPXCHG instruction returns success in ZF flag, so this change saves a
compare after the CMPXCHG.
Tested by building a native Fedora-38 kernel and rebooting
a 12-way SMP system using "shutdown -r" command some 100 times.
No functional change intended.
Signed-off-by: Uros Bizjak <ubizjak@gmail.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20231123203605.3474745-2-ubizjak@gmail.com
Diffstat (limited to 'tools/perf/scripts/python/export-to-sqlite.py')
0 files changed, 0 insertions, 0 deletions