This bug is introduced by me in commit 27f6c573e0. I forget to execute put_cpu_var operation after get_cpu_var. Fix it via this_cpu_write instead of get_cpu_var. v2 -> v1: Separate cleanup from bug fix. Signed-off-by: Chen, Gong Suggested-by: H. Peter Anvin --- arch/x86/kernel/cpu/mcheck/mce.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c index eeee23f..68317c8 100644 --- a/arch/x86/kernel/cpu/mcheck/mce.c +++ b/arch/x86/kernel/cpu/mcheck/mce.c @@ -598,7 +598,6 @@ void machine_check_poll(enum mcp_flags flags, mce_banks_t *b) { struct mce m; int i; - unsigned long *v; this_cpu_inc(mce_poll_count); @@ -618,8 +617,7 @@ void machine_check_poll(enum mcp_flags flags, mce_banks_t *b) if (!(m.status & MCI_STATUS_VAL)) continue; - v = &get_cpu_var(mce_polled_error); - set_bit(0, v); + this_cpu_write(mce_polled_error, 1); /* * Uncorrected or signalled events are handled by the exception * handler when it is enabled, so don't process those here. -- 1.9.0