linux-kernel - [GIT PULL] sched/printk fixes

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Message-ID: <20101208075854.GA23179@elte.hu>
Date:	Wed, 8 Dec 2010 08:58:54 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: [GIT PULL] sched/printk fixes

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);
 }
 
 /**
--
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