linux-kernel - [PATCH 04/12] lockdep: Add file and line to initialize sequence of spinlock

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Date:	Fri, 22 Jan 2010 22:39:05 +0900
From:	Hitoshi Mitake <mitake@....info.waseda.ac.jp>
To:	Ingo Molnar <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>
Subject: [PATCH 04/12] lockdep: Add file and line to initialize sequence of spinlock

spinlock has two way to be initialized.
1: the macros DEFINE_{SPIN,RW}LOCK for statically defined locks
2: the functions {spin_,rw}lock_init() for locks on dynamically allocated memory

This patch modifies these two initialize sequences
for adding __FILE__ and __LINE__ to lockdep_map.

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>
---
 include/linux/spinlock.h       |    6 ++++--
 include/linux/spinlock_types.h |    6 +++++-
 lib/spinlock_debug.c           |    6 ++++--
 3 files changed, 13 insertions(+), 5 deletions(-)

diff --git a/include/linux/spinlock.h b/include/linux/spinlock.h
index 8608821..f8b8363 100644
--- a/include/linux/spinlock.h
+++ b/include/linux/spinlock.h
@@ -90,12 +90,14 @@
 
 #ifdef CONFIG_DEBUG_SPINLOCK
   extern void __raw_spin_lock_init(raw_spinlock_t *lock, const char *name,
-				   struct lock_class_key *key);
+				   struct lock_class_key *key,
+				   const char *file, unsigned int line);
 # define raw_spin_lock_init(lock)				\
 do {								\
 	static struct lock_class_key __key;			\
 								\
-	__raw_spin_lock_init((lock), #lock, &__key);		\
+	__raw_spin_lock_init((lock), #lock, &__key,		\
+			     __FILE__, __LINE__);		\
 } while (0)
 
 #else
diff --git a/include/linux/spinlock_types.h b/include/linux/spinlock_types.h
index 851b778..6f2d558 100644
--- a/include/linux/spinlock_types.h
+++ b/include/linux/spinlock_types.h
@@ -36,7 +36,11 @@ typedef struct raw_spinlock {
 #define SPINLOCK_OWNER_INIT	((void *)-1L)
 
 #ifdef CONFIG_DEBUG_LOCK_ALLOC
-# define SPIN_DEP_MAP_INIT(lockname)	.dep_map = { .name = #lockname }
+# define SPIN_DEP_MAP_INIT(lockname)	.dep_map = {	\
+		.name = #lockname,			\
+		.file = __FILE__,			\
+		.line = __LINE__,			\
+	}
 #else
 # define SPIN_DEP_MAP_INIT(lockname)
 #endif
diff --git a/lib/spinlock_debug.c b/lib/spinlock_debug.c
index 4755b98..81fa789 100644
--- a/lib/spinlock_debug.c
+++ b/lib/spinlock_debug.c
@@ -14,14 +14,16 @@
 #include <linux/module.h>
 
 void __raw_spin_lock_init(raw_spinlock_t *lock, const char *name,
-			  struct lock_class_key *key)
+			  struct lock_class_key *key,
+			  const char *file, unsigned int line)
 {
 #ifdef CONFIG_DEBUG_LOCK_ALLOC
 	/*
 	 * Make sure we are not reinitializing a held lock:
 	 */
 	debug_check_no_locks_freed((void *)lock, sizeof(*lock));
-	lockdep_init_map(&lock->dep_map, name, key, 0);
+	__lockdep_init_map(&lock->dep_map, name, key, 0,
+			   file, line);
 #endif
 	lock->raw_lock = (arch_spinlock_t)__ARCH_SPIN_LOCK_UNLOCKED;
 	lock->magic = SPINLOCK_MAGIC;
-- 
1.6.5.2

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