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Message-ID: <20241007085651.48544-1-ubizjak@gmail.com>
Date: Mon, 7 Oct 2024 10:56:28 +0200
From: Uros Bizjak <ubizjak@...il.com>
To: linux-trace-kernel@...r.kernel.org,
linux-kernel@...r.kernel.org
Cc: Uros Bizjak <ubizjak@...il.com>,
Steven Rostedt <rostedt@...dmis.org>,
Masami Hiramatsu <mhiramat@...nel.org>,
Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
Subject: [PATCH] tracing: Use atomic64_inc_return() in trace_clock_counter()
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.
Signed-off-by: Uros Bizjak <ubizjak@...il.com>
Cc: Steven Rostedt <rostedt@...dmis.org>
Cc: Masami Hiramatsu <mhiramat@...nel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
---
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 4702efb00ff2..4cb2ebc439be 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);
}
--
2.46.2
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