* [PATCH 3/4] migrate_disable pushd down in atomic_dec_and_spin_lock
@ 2013-11-30 3:07 Nicholas Mc Guire
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From: Nicholas Mc Guire @ 2013-11-30 3:07 UTC (permalink / raw)
To: linux-rt-users
>From 44d3537f3d7053562aeef2739c460f472c78da71 Mon Sep 17 00:00:00 2001
From: Nicholas Mc Guire <der.herr@hofr.at>
Date: Fri, 29 Nov 2013 00:19:41 -0500
Subject: [PATCH 3/4] migrate_disable pushd down in atomic_dec_and_spin_lock
Signed-off-by: Nicholas Mc Guire <der.herr@hofr.at>
---
kernel/rtmutex.c | 6 +++---
1 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/kernel/rtmutex.c b/kernel/rtmutex.c
index 891ac58..f99e85a 100644
--- a/kernel/rtmutex.c
+++ b/kernel/rtmutex.c
@@ -952,12 +952,12 @@ int atomic_dec_and_spin_lock(atomic_t *atomic, spinlock_t *lock)
/* Subtract 1 from counter unless that drops it to 0 (ie. it was 1) */
if (atomic_add_unless(atomic, -1, 1))
return 0;
- migrate_disable();
rt_spin_lock(lock);
- if (atomic_dec_and_test(atomic))
+ if (atomic_dec_and_test(atomic)){
+ migrate_disable();
return 1;
+ }
rt_spin_unlock(lock);
- migrate_enable();
return 0;
}
EXPORT_SYMBOL(atomic_dec_and_spin_lock);
--
1.7.2.5
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2013-11-30 3:07 [PATCH 3/4] migrate_disable pushd down in atomic_dec_and_spin_lock Nicholas Mc Guire
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