[PATCH] x86/mce: Fix incorrect comment in do_machine_check()

[Chen Yucong]

In do_machine_check function, we can find the following code segment:

*       ...
*        /* mce_clear_state will clear *final, save locally for use later */
*        m = *final;
*
*        if (!no_way_out)
*                mce_clear_state(toclear);
*       ...

But the reality is that mce_clear_state function will not clear *final. It is just
used to clear bank MSRs or the relative field of injectm used by MCE-Injection.
Meanwhile, mce_reign executed by monarch CPU will clear *final, therefore we need
to save it locally for use later.

Signed-off-by: Chen Yucong <slaoub@xxxxxxxxx>
---
 arch/x86/kernel/cpu/mcheck/mce.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
index 68317c8..83159c1 100644
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -1137,7 +1137,9 @@ void do_machine_check(struct pt_regs *regs, long error_code)
 		}
 	}
 
-	/* mce_clear_state will clear *final, save locally for use later */
+	/* mce_reign executed by monarch CPU will clear *final(mces_seen),
+	 * save locally for use later
+	 */
 	m = *final;
 
 	if (!no_way_out)
-- 
1.7.10.4

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