From: Peter Zijlstra <peterz@infradead.org>
To: Ingo Molnar <mingo@elte.hu>
Cc: tglx <tglx@linutronix.de>, LKML <linux-kernel@vger.kernel.org>
Subject: [PATCH] perf_event: Fix preempt warning in perf_clock()
Date: Fri, 26 Feb 2010 16:36:23 +0100 [thread overview]
Message-ID: <1267198583.22519.684.camel@laptop> (raw)
A recent commit introduced a preemption warning for perf_clock(), use
raw_smp_processor_id() to avoid this, it really doesn't matter which cpu
we use here.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
CC: stable@kernel.org
LKML-Reference: <new-submission>
---
Index: linux-2.6/kernel/perf_event.c
===================================================================
--- linux-2.6.orig/kernel/perf_event.c
+++ linux-2.6/kernel/perf_event.c
@@ -249,7 +249,7 @@ static void perf_unpin_context(struct pe
static inline u64 perf_clock(void)
{
- return cpu_clock(smp_processor_id());
+ return cpu_clock(raw_smp_processor_id());
}
/*
next reply other threads:[~2010-02-26 15:36 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-02-26 15:36 Peter Zijlstra [this message]
2010-02-26 16:27 ` [tip:perf/core] perf_event: Fix preempt warning in perf_clock() tip-bot for Peter Zijlstra
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1267198583.22519.684.camel@laptop \
--to=peterz@infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@elte.hu \
--cc=tglx@linutronix.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox