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Subject[PATCH] [1/10] x86: MCE: Reinitialize per cpu features on resume v3

Impact: Bug fix

This fixes a long standing bug in the machine check code. On resume the
boot CPU wouldn't get its vendor specific state like thermal handling
reinitialized. This means the boot cpu wouldn't ever get any thermal
events reported again.

Call the respective initialization functions on resume

v2: Remove ancient init because they don't have a resume device anyways.
Pointed out by Thomas Gleixner.
v3: Now fix the Subject too to reflect v2 change

Signed-off-by: Andi Kleen <>

arch/x86/kernel/cpu/mcheck/mce_64.c | 1 +
1 file changed, 1 insertion(+)

Index: linux/arch/x86/kernel/cpu/mcheck/mce_64.c
--- linux.orig/arch/x86/kernel/cpu/mcheck/mce_64.c 2009-02-12 11:30:51.000000000 +0100
+++ linux/arch/x86/kernel/cpu/mcheck/mce_64.c 2009-02-12 12:10:22.000000000 +0100
@@ -734,6 +734,7 @@
static int mce_resume(struct sys_device *dev)
+ mce_cpu_features(&current_cpu_data);
return 0;

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