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| author | Uros Bizjak <ubizjak@gmail.com> | 2023-07-14 17:43:34 +0200 |
|---|---|---|
| committer | Steven Rostedt (Google) <rostedt@goodmis.org> | 2023-07-30 18:11:45 -0400 |
| commit | 00a8478f8f5c0201004240746dd74d69d86fc0c4 (patch) | |
| tree | 823215d91b6a2243e1fd5c8a8bf721c541a8c117 /tools/perf/scripts/python/syscall-counts.py | |
| parent | e7186af7fb2609584a8bfb3da3c6ae09da5a5224 (diff) | |
ring_buffer: Use try_cmpxchg instead of cmpxchg
Use try_cmpxchg instead of cmpxchg (*ptr, old, new) == old in
ring_buffer.c. 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.
Link: https://lore.kernel.org/linux-trace-kernel/20230714154418.8884-1-ubizjak@gmail.com
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Uros Bizjak <ubizjak@gmail.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Diffstat (limited to 'tools/perf/scripts/python/syscall-counts.py')
0 files changed, 0 insertions, 0 deletions