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| author | Uros Bizjak <[email protected]> | 2023-11-23 20:34:23 +0000 |
|---|---|---|
| committer | Ingo Molnar <[email protected]> | 2023-11-30 19:25:09 +0000 |
| commit | 9e9d673b2c84719937db5d6ab1d8cbcd7d45e974 (patch) | |
| tree | a258dea9e23cb10d51a214f04b4d03ef019aa0dc /scripts/generate_rust_target.rs | |
| parent | x86/smp: Move the call to smp_processor_id() after the early exit in native_s... (diff) | |
| download | kernel-9e9d673b2c84719937db5d6ab1d8cbcd7d45e974.tar.gz kernel-9e9d673b2c84719937db5d6ab1d8cbcd7d45e974.zip | |
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 <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Diffstat (limited to 'scripts/generate_rust_target.rs')
0 files changed, 0 insertions, 0 deletions