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| author |   Uros Bizjak <ubizjak@gmail.com> | 2024-05-23 09:35:14 +0200 |
|---|---|---|
| committer |   Andrew Morton <akpm@linux-foundation.org> | 2024-06-24 22:24:56 -0700 |
| commit | 47e39c79336760031f98215c014c9800f5ed6481 (patch) | |
| tree | 20851bdb3feb8b90a03e4f9eaac4a4ad1f462e9a /include/linux | |
| parent | ocfs2: strict bound check before memcmp in ocfs2_xattr_find_entry() (diff) | |
| download | wireguard-linux-47e39c79336760031f98215c014c9800f5ed6481.tar.xz wireguard-linux-47e39c79336760031f98215c014c9800f5ed6481.zip | |
fork: use this_cpu_try_cmpxchg() in try_release_thread_stack_to_cache()
Use this_cpu_try_cmpxchg() instead of this_cpu_cmpxchg (*ptr, old, new) ==
old in try_release_thread_stack_to_cache. x86 CMPXCHG instruction returns
success in ZF flag, so this change saves a compare after cmpxchg (and
related move instruction in front of cmpxchg).
No functional change intended.
[ubizjak@gmail.com: simplify the for loop a bit]
Link: https://lkml.kernel.org/r/20240523214442.21102-1-ubizjak@gmail.com
Link: https://lkml.kernel.org/r/20240523073530.8128-1-ubizjak@gmail.com
Signed-off-by: Uros Bizjak <ubizjak@gmail.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Kees Cook <keescook@chromium.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'include/linux')
0 files changed, 0 insertions, 0 deletions