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From: "Vineeth Pillai (Google)" <vineeth@bitbyteword.org>
Cc: "Vineeth Pillai (Google)" <vineeth@bitbyteword.org>,
	Steven Rostedt <rostedt@goodmis.org>,
	Peter Zijlstra <peterz@infradead.org>,
	MyungJoo Ham <myungjoo.ham@samsung.com>,
	Kyungmin Park <kyungmin.park@samsung.com>,
	Chanwoo Choi <cw00.choi@samsung.com>,
	linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-trace-kernel@vger.kernel.org
Subject: [PATCH 07/15] devfreq: Use trace_invoke_##name() at guarded tracepoint call sites
Date: Thu, 12 Mar 2026 11:05:02 -0400	[thread overview]
Message-ID: <20260312150523.2054552-8-vineeth@bitbyteword.org> (raw)
In-Reply-To: <20260312150523.2054552-1-vineeth@bitbyteword.org>

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

Suggested-by: Steven Rostedt <rostedt@goodmis.org>
Suggested-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Vineeth Pillai (Google) <vineeth@bitbyteword.org>
Assisted-by: Claude:claude-sonnet-4-6
---
 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 c0a74091b9041..42278449d4b27 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_invoke_devfreq_frequency(devfreq, new_freq, cur_freq);
 
 	freqs.new = new_freq;
 	devfreq_notify_transition(devfreq, &freqs, DEVFREQ_POSTCHANGE);
-- 
2.53.0


  parent reply	other threads:[~2026-03-12 15:05 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-03-12 15:04 [PATCH 00/15] tracepoint: Avoid double static_branch evaluation at guarded call sites Vineeth Pillai (Google)
2026-03-12 15:04 ` [PATCH 01/15] tracepoint: Add trace_invoke_##name() API Vineeth Pillai (Google)
2026-03-12 15:12   ` Steven Rostedt
2026-03-12 15:39     ` Vineeth Remanan Pillai
2026-03-12 15:53       ` Peter Zijlstra
2026-03-12 16:05         ` Vineeth Remanan Pillai
2026-03-14  0:24           ` Keith Busch
2026-03-12 15:05 ` [PATCH 06/15] cpufreq: Use trace_invoke_##name() at guarded tracepoint call sites Vineeth Pillai (Google)
2026-03-12 18:58   ` Rafael J. Wysocki
2026-03-13  6:07   ` Viresh Kumar
2026-03-12 15:05 ` Vineeth Pillai (Google) [this message]
2026-03-12 15:12 ` [PATCH 00/15] tracepoint: Avoid double static_branch evaluation at guarded " Mathieu Desnoyers
2026-03-12 15:23   ` Steven Rostedt
2026-03-12 15:28     ` Mathieu Desnoyers
2026-03-12 15:40       ` Steven Rostedt
2026-03-12 15:49         ` Mathieu Desnoyers
2026-03-12 15:54           ` Peter Zijlstra
2026-03-12 15:57             ` Mathieu Desnoyers
2026-03-12 16:08           ` Vineeth Remanan Pillai
2026-03-12 16:54             ` Andrii Nakryiko
2026-03-12 17:02               ` Steven Rostedt
2026-03-13 14:02                 ` Vineeth Remanan Pillai
2026-03-17 16:00                   ` Steven Rostedt
2026-03-17 16:02                     ` Mathieu Desnoyers
2026-03-18 10:58                       ` Vineeth Remanan Pillai

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