linux-kernel - [PATCH v2.1 4/9] tracing, preempt: Squash

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Date:   Tue, 31 Jan 2023 09:50:36 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     mingo@...nel.org
Cc:     will@...nel.org, boqun.feng@...il.com, mark.rutland@....com,
        tglx@...utronix.de, mingo@...hat.com, bp@...en8.de,
        dave.hansen@...ux.intel.com, x86@...nel.org, hpa@...or.com,
        seanjc@...gle.com, pbonzini@...hat.com, jgross@...e.com,
        srivatsa@...il.mit.edu, amakhalov@...are.com,
        pv-drivers@...are.com, wanpengli@...cent.com, vkuznets@...hat.com,
        boris.ostrovsky@...cle.com, rafael@...nel.org,
        daniel.lezcano@...aro.org, lpieralisi@...nel.org,
        frederic@...nel.org, paulmck@...nel.org, rostedt@...dmis.org,
        mhiramat@...nel.org, longman@...hat.com, juri.lelli@...hat.com,
        vincent.guittot@...aro.org, dietmar.eggemann@....com,
        bsegall@...gle.com, mgorman@...e.de, bristot@...hat.com,
        vschneid@...hat.com, linux-kernel@...r.kernel.org,
        kvm@...r.kernel.org, virtualization@...ts.linux-foundation.org,
        linux-pm@...r.kernel.org, linux-trace-kernel@...r.kernel.org
Subject: [PATCH v2.1 4/9] tracing, preempt: Squash _rcuidle tracing


Extend commit 9aedeaed6fc6 ("tracing, hardirq: No moar _rcuidle()
tracing") to also cover trace_preempt_{on,off}() which were
mysteriously untouched.

Fixes: 9aedeaed6fc6 ("tracing, hardirq: No moar _rcuidle() tracing")
Reported-by: Mark Rutland <mark.rutland@....com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Tested-by: Mark Rutland <mark.rutland@....com>
Link: https://lkml.kernel.org/r/Y9D5AfnOukWNOZ5q@hirez.programming.kicks-ass.net
---
 kernel/trace/trace_preemptirq.c |   14 ++++++--------
 1 file changed, 6 insertions(+), 8 deletions(-)

--- a/kernel/trace/trace_preemptirq.c
+++ b/kernel/trace/trace_preemptirq.c
@@ -15,10 +15,6 @@
 #define CREATE_TRACE_POINTS
 #include <trace/events/preemptirq.h>
 
-#ifdef CONFIG_TRACE_IRQFLAGS
-/* Per-cpu variable to prevent redundant calls when IRQs already off */
-static DEFINE_PER_CPU(int, tracing_irq_cpu);
-
 /*
  * Use regular trace points on architectures that implement noinstr
  * tooling: these calls will only happen with RCU enabled, which can
@@ -33,6 +29,10 @@ static DEFINE_PER_CPU(int, tracing_irq_c
 #define trace(point)	if (!in_nmi()) trace_##point##_rcuidle
 #endif
 
+#ifdef CONFIG_TRACE_IRQFLAGS
+/* Per-cpu variable to prevent redundant calls when IRQs already off */
+static DEFINE_PER_CPU(int, tracing_irq_cpu);
+
 /*
  * Like trace_hardirqs_on() but without the lockdep invocation. This is
  * used in the low level entry code where the ordering vs. RCU is important
@@ -100,15 +100,13 @@ NOKPROBE_SYMBOL(trace_hardirqs_off);
 
 void trace_preempt_on(unsigned long a0, unsigned long a1)
 {
-	if (!in_nmi())
-		trace_preempt_enable_rcuidle(a0, a1);
+	trace(preempt_enable)(a0, a1);
 	tracer_preempt_on(a0, a1);
 }
 
 void trace_preempt_off(unsigned long a0, unsigned long a1)
 {
-	if (!in_nmi())
-		trace_preempt_disable_rcuidle(a0, a1);
+	trace(preempt_disable)(a0, a1);
 	tracer_preempt_off(a0, a1);
 }
 #endif