-
Uros Bizjak authored
Use try_cmpxchg instead of cmpxchg (*ptr, old, new) == old. x86 CMPXCHG instruction returns success in ZF flag, so this change saves a compare after cmpxchg (and related move instruction in front of cmpxchg). Also, try_cmpxchg implicitly assigns old *ptr value to "old" when cmpxchg fails. There is no need to re-read the value in the loop. No functional change intended. Link: https://lkml.kernel.org/r/20230305155532.5549-4-ubizjak@gmail.com Cc: Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by:
Uros Bizjak <ubizjak@gmail.com> Acked-by:
Mukesh Ojha <quic_mojha@quicinc.com> Signed-off-by:
Steven Rostedt (Google) <rostedt@goodmis.org>
8328e36d