linux-kernel - [PATCH v2 07/11] lockdep: Add file and line to initialize sequence of rwsem (x86)

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Date:	Sat, 30 Jan 2010 20:43:29 +0900
From:	Hitoshi Mitake <mitake@....info.waseda.ac.jp>
To:	mingo@...e.hu
Cc:	linux-kernel@...r.kernel.org,
	Hitoshi Mitake <mitake@....info.waseda.ac.jp>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: [PATCH v2 07/11] lockdep:  Add file and line to initialize sequence of rwsem (x86)

This patch adds __FILE__ and __LINE__ to lockdep_map of rw_semaphore.
This patch only affects to x86 architecture dependent rwsem.

If this patch is accepted, I'll prepare and send the patch
adds __FILE__ and __LINE__ to rw_semaphore of other architectures
which provides architecture dependent rwsem.h .

Signed-off-by: Hitoshi Mitake <mitake@....info.waseda.ac.jp>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Thomas Gleixner <tglx@...utronix.de>
---
 arch/x86/include/asm/rwsem.h |    9 +++++++--
 1 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/arch/x86/include/asm/rwsem.h b/arch/x86/include/asm/rwsem.h
index ca7517d..24cbe3a 100644
--- a/arch/x86/include/asm/rwsem.h
+++ b/arch/x86/include/asm/rwsem.h
@@ -74,7 +74,12 @@ struct rw_semaphore {
 };
 
 #ifdef CONFIG_DEBUG_LOCK_ALLOC
-# define __RWSEM_DEP_MAP_INIT(lockname) , .dep_map = { .name = #lockname }
+# define __RWSEM_DEP_MAP_INIT(lockname)			\
+	, .dep_map = {					\
+		.file = __FILE__,			\
+		.line = __LINE__,			\
+		.name = #lockname,			\
+	}
 #else
 # define __RWSEM_DEP_MAP_INIT(lockname)
 #endif
@@ -96,7 +101,7 @@ extern void __init_rwsem(struct rw_semaphore *sem, const char *name,
 do {								\
 	static struct lock_class_key __key;			\
 								\
-	__init_rwsem((sem), #sem, &__key);			\
+	__init_rwsem((sem), #sem, &__key, __FILE__, __LINE__);	\
 } while (0)
 
 /*
-- 
1.6.5.2

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