* [PATCH AUTOSEL 4.19 1/6] tracing: Use atomic64_inc_return() in trace_clock_counter()
@ 2024-12-04 15:52 Sasha Levin
0 siblings, 0 replies; only message in thread
From: Sasha Levin @ 2024-12-04 15:52 UTC (permalink / raw)
To: linux-kernel, stable
Cc: Uros Bizjak, Steven Rostedt, Masami Hiramatsu, Mathieu Desnoyers,
Sasha Levin, linux-trace-kernel
From: Uros Bizjak <ubizjak@gmail.com>
[ Upstream commit eb887c4567d1b0e7684c026fe7df44afa96589e6 ]
Use atomic64_inc_return(&ref) instead of atomic64_add_return(1, &ref)
to use optimized implementation and ease register pressure around
the primitive for targets that implement optimized variant.
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Link: https://lore.kernel.org/20241007085651.48544-1-ubizjak@gmail.com
Signed-off-by: Uros Bizjak <ubizjak@gmail.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
kernel/trace/trace_clock.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/trace/trace_clock.c b/kernel/trace/trace_clock.c
index 4702efb00ff21..4cb2ebc439be6 100644
--- a/kernel/trace/trace_clock.c
+++ b/kernel/trace/trace_clock.c
@@ -154,5 +154,5 @@ static atomic64_t trace_counter;
*/
u64 notrace trace_clock_counter(void)
{
- return atomic64_add_return(1, &trace_counter);
+ return atomic64_inc_return(&trace_counter);
}
--
2.43.0
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