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From 9c51b4d3cc13cb79f1473a1dd176681f2ca4dbc3 Mon Sep 17 00:00:00 2001
From: Paul Gortmaker <paul.gortmaker@windriver.com>
Date: Sun, 23 Jan 2011 15:27:40 -0500
Subject: [PATCH] spinlock: fix compile failures for !PREEMPT_RT
This is one of several extractions from the merge up to 33-rc8.
See it in a git tip repo with:
git diff 5f854cfc024622e4aae14d7cf422f6ff86278688^2 \
5f854cfc024622e4aae14d7cf422f6ff86278688 \
kernel/spinlock.c
You can find the origin of this change in the tip merge commit:
commit 5f854cfc024622e4aae14d7cf422f6ff86278688
Merge: cc24da0 4ec62b2
Author: Thomas Gleixner <tglx@linutronix.de>
Date: Sun Feb 21 20:17:22 2010 +0100
Forward to 2.6.33-rc8
Merge branch 'linus' into rt/head with a pile of conflicts.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Normally there are not significant changes/additions in a merge commit that
are not from any other "normal" commit. But in this case there are, so
break them out into separate explicit commits.
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
---
include/linux/spinlock_api_smp.h | 2 ++
kernel/spinlock.c | 7 +++++++
2 files changed, 9 insertions(+), 0 deletions(-)
diff --git a/include/linux/spinlock_api_smp.h b/include/linux/spinlock_api_smp.h
index e253ccd..efe395f 100644
--- a/include/linux/spinlock_api_smp.h
+++ b/include/linux/spinlock_api_smp.h
@@ -191,6 +191,8 @@ static inline int __raw_spin_trylock_bh(raw_spinlock_t *lock)
return 0;
}
+#ifndef CONFIG_PREEMPT_RT
#include <linux/rwlock_api_smp.h>
+#endif
#endif /* __LINUX_SPINLOCK_API_SMP_H */
diff --git a/kernel/spinlock.c b/kernel/spinlock.c
index be6517f..e1d9b78 100644
--- a/kernel/spinlock.c
+++ b/kernel/spinlock.c
@@ -110,8 +110,11 @@ void __lockfunc __raw_##op##_lock_bh(locktype##_t *lock) \
* __[spin|read|write]_lock_bh()
*/
BUILD_LOCK_OPS(spin, raw_spinlock);
+
+#ifndef CONFIG_PREEMPT_RT
BUILD_LOCK_OPS(read, rwlock);
BUILD_LOCK_OPS(write, rwlock);
+#endif
#endif
@@ -195,6 +198,8 @@ void __lockfunc _raw_spin_unlock_bh(raw_spinlock_t *lock)
EXPORT_SYMBOL(_raw_spin_unlock_bh);
#endif
+#ifndef CONFIG_PREEMPT_RT
+
#ifndef CONFIG_INLINE_READ_TRYLOCK
int __lockfunc _raw_read_trylock(rwlock_t *lock)
{
@@ -339,6 +344,8 @@ void __lockfunc _raw_write_unlock_bh(rwlock_t *lock)
EXPORT_SYMBOL(_raw_write_unlock_bh);
#endif
+#endif /* !PREEMPT_RT */
+
#ifdef CONFIG_DEBUG_LOCK_ALLOC
void __lockfunc _raw_spin_lock_nested(raw_spinlock_t *lock, int subclass)
--
1.7.0.4
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