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Date:	Wed, 16 Dec 2009 17:15:20 -0800
From:	Greg KH <>
	Jan Beulich <>,
	Hidetoshi Seto <>,
	Ingo Molnar <>
Subject: [69/90] x86/mce: Set up timer unconditionally

2.6.31-stable review patch.  If anyone has any objections, please let us know.


From: Jan Beulich <>

commit bc09effabf0c5c6c7021e5ef9af15a23579b32a8 upstream.

mce_timer must be passed to setup_timer() in all cases, no
matter whether it is going to be actually used. Otherwise, when
the CPU gets brought down, its call to del_timer_sync() will
never return, as the timer won't have a base associated, and
hence lock_timer_base() will loop infinitely.

Signed-off-by: Jan Beulich <>
Signed-off-by: Hidetoshi Seto <>
LKML-Reference: <>
Signed-off-by: Ingo Molnar <>
Signed-off-by: Greg Kroah-Hartman <>

 arch/x86/kernel/cpu/mcheck/mce.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -1327,13 +1327,14 @@ static void mce_init_timer(void)
 	struct timer_list *t = &__get_cpu_var(mce_timer);
 	int *n = &__get_cpu_var(next_interval);
+	setup_timer(t, mcheck_timer, smp_processor_id());
 	if (mce_ignore_ce)
 	*n = check_interval * HZ;
 	if (!*n)
-	setup_timer(t, mcheck_timer, smp_processor_id());
 	t->expires = round_jiffies(jiffies + *n);
 	add_timer_on(t, smp_processor_id());

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