>From 46393dc3185026c8500c2b734747d7c8785f3dc9 Mon Sep 17 00:00:00 2001
From: Nicholas Mc Guire <der.herr@xxxxxxx>
Date: Tue, 19 Nov 2013 23:31:05 -0500
Subject: [PATCH 1/2] remove recursive call to migrate_disable in read_lock_bh
read_lock_bh/read_unlock_bh unconditionally calls local_bh_disable/enable
which already does a migrate_disable/enable - no need for this recursive call.
patch is on top of 3.12-rt2
No change of functionality
Signed-off-by: Nicholas Mc Guire <der.herr@xxxxxxx>
---
include/linux/rwlock_rt.h | 2 --
1 files changed, 0 insertions(+), 2 deletions(-)
diff --git a/include/linux/rwlock_rt.h b/include/linux/rwlock_rt.h
index 853ee36..87f5a1d 100644
--- a/include/linux/rwlock_rt.h
+++ b/include/linux/rwlock_rt.h
@@ -53,7 +53,6 @@ extern void __rt_rwlock_init(rwlock_t *rwlock, char *name, struct lock_class_key
#define read_lock_bh(lock) \
do { \
local_bh_disable(); \
- migrate_disable(); \
rt_read_lock(lock); \
} while (0)
@@ -83,7 +82,6 @@ extern void __rt_rwlock_init(rwlock_t *rwlock, char *name, struct lock_class_key
#define read_unlock_bh(lock) \
do { \
rt_read_unlock(lock); \
- migrate_enable(); \
local_bh_enable(); \
} while (0)
--
1.7.2.5
--
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