linux-kernel - [PATCH] Fix sparse annotation of spin unlock macros in one case

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Message-Id: <1170139680.8587.7.camel@dv>
Date:	Tue, 30 Jan 2007 01:48:00 -0500
From:	Pavel Roskin <proski@....org>
To:	linux-kernel@...r.kernel.org
Subject: [PATCH] Fix sparse annotation of spin unlock macros in one case

From: Pavel Roskin <proski@....org>

SMP systems without preemption and spinlock debugging enabled use unlock
macros that don't tell sparse that the lock is being released.  Add
sparse annotations in this case.

Signed-off-by: Pavel Roskin <proski@....org>
---

 include/linux/spinlock.h |   33 ++++++++++++++++++++++++---------
 1 files changed, 24 insertions(+), 9 deletions(-)

diff --git a/include/linux/spinlock.h b/include/linux/spinlock.h
index 94b767d..d3b6397 100644
--- a/include/linux/spinlock.h
+++ b/include/linux/spinlock.h
@@ -228,15 +228,30 @@ do {								\
 # define read_unlock_irq(lock)		_read_unlock_irq(lock)
 # define write_unlock_irq(lock)		_write_unlock_irq(lock)
 #else
-# define spin_unlock(lock)		__raw_spin_unlock(&(lock)->raw_lock)
-# define read_unlock(lock)		__raw_read_unlock(&(lock)->raw_lock)
-# define write_unlock(lock)		__raw_write_unlock(&(lock)->raw_lock)
-# define spin_unlock_irq(lock) \
-    do { __raw_spin_unlock(&(lock)->raw_lock); local_irq_enable(); } while (0)
-# define read_unlock_irq(lock) \
-    do { __raw_read_unlock(&(lock)->raw_lock); local_irq_enable(); } while (0)
-# define write_unlock_irq(lock) \
-    do { __raw_write_unlock(&(lock)->raw_lock); local_irq_enable(); } while (0)
+# define spin_unlock(lock) \
+    do {__raw_spin_unlock(&(lock)->raw_lock); __release(lock); } while (0)
+# define read_unlock(lock) \
+    do {__raw_read_unlock(&(lock)->raw_lock); __release(lock); } while (0)
+# define write_unlock(lock) \
+    do {__raw_write_unlock(&(lock)->raw_lock); __release(lock); } while (0)
+# define spin_unlock_irq(lock)			\
+do {						\
+	__raw_spin_unlock(&(lock)->raw_lock);	\
+	local_irq_enable();			\
+	__release(lock);			\
+} while (0)
+# define read_unlock_irq(lock)			\
+do {						\
+	__raw_read_unlock(&(lock)->raw_lock);	\
+	local_irq_enable();			\
+	__release(lock);			\
+} while (0)
+# define write_unlock_irq(lock)			\
+do {						\
+	__raw_write_unlock(&(lock)->raw_lock);	\
+	local_irq_enable();			\
+	__release(lock);			\
+} while (0)
 #endif
 
 #define spin_unlock_irqrestore(lock, flags) \


-- 
Regards,
Pavel Roskin


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