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Date: Sun, 11 Nov 2018 19:49:05 +0000
From: Ben Hutchings <ben@...adent.org.uk>
To: linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC: akpm@...ux-foundation.org,
"Dewet Thibaut" <thibaut.dewet@...ia.com>,
"Tony Luck" <tony.luck@...el.com>,
"Thomas Gleixner" <tglx@...utronix.de>,
"linux-edac" <linux-edac@...r.kernel.org>,
"Alexander Sverdlin" <alexander.sverdlin@...ia.com>,
"Borislav Petkov" <bp@...e.de>
Subject: [PATCH 3.16 265/366] x86/MCE: Remove min interval polling limitation
3.16.61-rc1 review patch. If anyone has any objections, please let me know.
------------------
From: Dewet Thibaut <thibaut.dewet@...ia.com>
commit fbdb328c6bae0a7c78d75734a738b66b86dffc96 upstream.
commit b3b7c4795c ("x86/MCE: Serialize sysfs changes") introduced a min
interval limitation when setting the check interval for polled MCEs.
However, the logic is that 0 disables polling for corrected MCEs, see
Documentation/x86/x86_64/machinecheck. The limitation prevents disabling.
Remove this limitation and allow the value 0 to disable polling again.
Fixes: b3b7c4795c ("x86/MCE: Serialize sysfs changes")
Signed-off-by: Dewet Thibaut <thibaut.dewet@...ia.com>
Signed-off-by: Alexander Sverdlin <alexander.sverdlin@...ia.com>
[ Massage commit message. ]
Signed-off-by: Borislav Petkov <bp@...e.de>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Cc: Tony Luck <tony.luck@...el.com>
Cc: linux-edac <linux-edac@...r.kernel.org>
Link: http://lkml.kernel.org/r/20180716084927.24869-1-alexander.sverdlin@nokia.com
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
arch/x86/kernel/cpu/mcheck/mce.c | 3 ---
1 file changed, 3 deletions(-)
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -2260,9 +2260,6 @@ static ssize_t store_int_with_restart(st
if (check_interval == old_check_interval)
return ret;
- if (check_interval < 1)
- check_interval = 1;
-
mutex_lock(&mce_sysfs_mutex);
mce_restart();
mutex_unlock(&mce_sysfs_mutex);
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