From: Ingo Molnar <mingo@elte.hu>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: linux-kernel@vger.kernel.org,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
Heiko Carstens <heiko.carstens@de.ibm.com>,
Thomas Gleixner <tglx@linutronix.de>,
Andrew Morton <akpm@linux-foundation.org>
Subject: [GIT PULL] sched/printk fixes
Date: Wed, 8 Dec 2010 08:58:54 +0100 [thread overview]
Message-ID: <20101208075854.GA23179@elte.hu> (raw)
Linus,
Please pull the latest sched-fixes-for-linus git tree from:
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip.git sched-fixes-for-linus
Thanks,
Ingo
------------------>
Heiko Carstens (2):
printk: Fix wake_up_klogd() vs cpu hotplug
nohz: Fix printk_needs_cpu() return value on offline cpus
kernel/printk.c | 4 +++-
1 files changed, 3 insertions(+), 1 deletions(-)
diff --git a/kernel/printk.c b/kernel/printk.c
index 9a2264f..a23315d 100644
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -1082,13 +1082,15 @@ void printk_tick(void)
int printk_needs_cpu(int cpu)
{
+ if (unlikely(cpu_is_offline(cpu)))
+ printk_tick();
return per_cpu(printk_pending, cpu);
}
void wake_up_klogd(void)
{
if (waitqueue_active(&log_wait))
- __raw_get_cpu_var(printk_pending) = 1;
+ this_cpu_write(printk_pending, 1);
}
/**
reply other threads:[~2010-12-08 7:59 UTC|newest]
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