Thread (10 messages) 10 messages, 1 author, 3d ago

[PATCH 3/9] devfreq: Use trace_call__##name() at guarded tracepoint call sites

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WARM3d

From: Steven Rostedt <rostedt@kernel.org>
Date: 2026-10-27 15:44:14
Also in: amd-gfx, bpf, dri-devel, linux-media, linux-pm, linux-scsi, linux-sctp, linux-trace-kernel, lkml
Subsystem: device frequency (devfreq), the rest · Maintainers: MyungJoo Ham, Kyungmin Park, Chanwoo Choi, Linus Torvalds

From: Vineeth Pillai <redacted>

Replace trace_foo() with the new trace_call__foo() at sites already
guarded by trace_foo_enabled(), avoiding a redundant
static_branch_unlikely() re-evaluation inside the tracepoint.
trace_call__foo() calls the tracepoint callbacks directly without
utilizing the static branch again.

Original v2 series:
https://lore.kernel.org/linux-trace-kernel/20260323160052.17528-1-vineeth@bitbyteword.org/ (local)

Parts of the original v2 series have already been merged in mainline.
This patch is being reposted as a follow-up cleanup for the remaining
unmerged pieces.

Link: https://patch.msgid.link/20260515135920.2238808-1-vineeth@bitbyteword.org (local)
Suggested-by: Steven Rostedt <rostedt@goodmis.org>
Suggested-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Vineeth Pillai (Google) <redacted>
Assisted-by: Claude:claude-sonnet-4-6
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
---
 drivers/devfreq/devfreq.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c
index 82dd9a43dc62..9f71d9dc4a70 100644
--- a/drivers/devfreq/devfreq.c
+++ b/drivers/devfreq/devfreq.c
@@ -370,7 +370,7 @@ static int devfreq_set_target(struct devfreq *devfreq, unsigned long new_freq,
 	 * change order of between devfreq device and passive devfreq device.
 	 */
 	if (trace_devfreq_frequency_enabled() && new_freq != cur_freq)
-		trace_devfreq_frequency(devfreq, new_freq, cur_freq);
+		trace_call__devfreq_frequency(devfreq, new_freq, cur_freq);
 
 	freqs.new = new_freq;
 	devfreq_notify_transition(devfreq, &freqs, DEVFREQ_POSTCHANGE);
-- 
2.53.0
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