This is a note to let you know that I've just added the patch titled
cpuidle / coupled: fix ready counter decrement
to the 3.7-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
cpuidle-coupled-fix-ready-counter-decrement.patch
and it can be found in the queue-3.7 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 92638e2facc5330475c7d558acec77721c3214e4 Mon Sep 17 00:00:00 2001
From: Sivaram Nair <[email protected]>
Date: Tue, 18 Dec 2012 13:52:54 +0100
Subject: cpuidle / coupled: fix ready counter decrement
From: Sivaram Nair <[email protected]>
commit 92638e2facc5330475c7d558acec77721c3214e4 upstream.
The ready_waiting_counts atomic variable is compared against the wrong
online cpu count. The latter is computed incorrectly using logical-OR
instead of bit-OR. This patch fixes that.
Signed-off-by: Sivaram Nair <[email protected]>
Acked-by: Santosh Shilimkar <[email protected]>
Acked-by: Colin Cross <[email protected]>
Signed-off-by: Rafael J. Wysocki <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/cpuidle/coupled.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/cpuidle/coupled.c
+++ b/drivers/cpuidle/coupled.c
@@ -209,7 +209,7 @@ inline int cpuidle_coupled_set_not_ready
int all;
int ret;
- all = coupled->online_count || (coupled->online_count << WAITING_BITS);
+ all = coupled->online_count | (coupled->online_count << WAITING_BITS);
ret = atomic_add_unless(&coupled->ready_waiting_counts,
-MAX_WAITING_CPUS, all);
Patches currently in stable-queue which might be from [email protected] are
queue-3.7/cpuidle-coupled-fix-ready-counter-decrement.patch
--
To unsubscribe from this list: send the line "unsubscribe stable" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
