diff --git a/[refs] b/[refs]
index 7ba19f66a646..110f7a467660 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: b170204ddb7844ffff62d2d537b20c0eeb97725e
+refs/heads/master: 8780e8e0f6b34862cdf2c62d4d2674d6bc3207db
diff --git a/trunk/Documentation/x86/x86_64/boot-options.txt b/trunk/Documentation/x86/x86_64/boot-options.txt
index 34c13040a718..63fca718256e 100644
--- a/trunk/Documentation/x86/x86_64/boot-options.txt
+++ b/trunk/Documentation/x86/x86_64/boot-options.txt
@@ -5,6 +5,8 @@ only the AMD64 specific ones are listed here.
 
 Machine check
 
+   Please see Documentation/x86/x86_64/machinecheck for sysfs runtime tunables.
+
    mce=off disable machine check
    mce=bootlog Enable logging of machine checks left over from booting.
                Disabled by default on AMD because some BIOS leave bogus ones.
diff --git a/trunk/Documentation/x86/x86_64/machinecheck b/trunk/Documentation/x86/x86_64/machinecheck
index a05e58e7b159..a4fdb25446e0 100644
--- a/trunk/Documentation/x86/x86_64/machinecheck
+++ b/trunk/Documentation/x86/x86_64/machinecheck
@@ -41,7 +41,9 @@ check_interval
 	the polling interval.  When the poller stops finding MCEs, it
 	triggers an exponential backoff (poll less often) on the polling
 	interval. The check_interval variable is both the initial and
-	maximum polling interval.
+	maximum polling interval. 0 means no polling for corrected machine
+	check errors (but some corrected errors might be still reported
+	in other ways)
 
 tolerant
 	Tolerance level. When a machine check exception occurs for a non