linux-kernel - [tip: sched/core] cpuidle: tracing, preempt: Squash

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date:   Tue, 31 Jan 2023 14:22:27 -0000
From:   "tip-bot2 for Peter Zijlstra" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Mark Rutland <mark.rutland@....com>,
        "Peter Zijlstra (Intel)" <peterz@...radead.org>,
        Ingo Molnar <mingo@...nel.org>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [tip: sched/core] cpuidle: tracing, preempt: Squash _rcuidle tracing

The following commit has been merged into the sched/core branch of tip:

Commit-ID:     3017ba4b831bc7fd67cc82e744116b6e45e259a4
Gitweb:        https://git.kernel.org/tip/3017ba4b831bc7fd67cc82e744116b6e45e259a4
Author:        Peter Zijlstra <peterz@...radead.org>
AuthorDate:    Tue, 31 Jan 2023 09:50:36 +01:00
Committer:     Ingo Molnar <mingo@...nel.org>
CommitterDate: Tue, 31 Jan 2023 15:01:46 +01:00

cpuidle: tracing, preempt: Squash _rcuidle tracing

Extend/fix 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>
Signed-off-by: Ingo Molnar <mingo@...nel.org>
Tested-by: Mark Rutland <mark.rutland@....com>
Link: https://lkml.kernel.org/r/Y9D5AfnOukWNOZ5q@hirez.programming.kicks-ass.net
Link: https://lore.kernel.org/r/Y9jWXKgkxY5EZVwW@hirez.programming.kicks-ass.net
---
 kernel/trace/trace_preemptirq.c | 14 ++++++--------
 1 file changed, 6 insertions(+), 8 deletions(-)

diff --git a/kernel/trace/trace_preemptirq.c b/kernel/trace/trace_preemptirq.c
index f992444..e37446f 100644
--- 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_cpu);
 #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