[PATCH 2/2] x86: mce: comment about MCE synchronization timeout on definition of tolerant

[Naoya Horiguchi]

commit 716079f66eac ("mce: Panic when a core has reached a timeout") changed
the behavior of mca_cfg->tolerant. So let's add comment about it.

Signed-off-by: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx>
---
 arch/x86/kernel/cpu/mcheck/mce.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git v3.19.orig/arch/x86/kernel/cpu/mcheck/mce.c v3.19/arch/x86/kernel/cpu/mcheck/mce.c
index 3a155b9e276e..2dc93bd62bbc 100644
--- v3.19.orig/arch/x86/kernel/cpu/mcheck/mce.c
+++ v3.19/arch/x86/kernel/cpu/mcheck/mce.c
@@ -69,8 +69,10 @@ struct mca_config mca_cfg __read_mostly = {
 	/*
 	 * Tolerant levels:
 	 * 0: always panic on uncorrected errors, log corrected errors
-	 * 1: panic or SIGBUS on uncorrected errors, log corrected errors
-	 * 2: SIGBUS or log uncorrected errors (if possible), log corr. errors
+	 * 1: panic or SIGBUS on uncorrected errors, log corrected errors,
+	 *    panic on MCE synchronization timeout.
+	 * 2: SIGBUS or log uncorrected errors (if possible), log corr. errors,
+	 *    no panic on MCE synchronization timeout.
 	 * 3: never panic or SIGBUS, log all errors (for testing only)
 	 */
 	.tolerant = 1,
-- 
1.9.3
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