linux-kernel - [PATCH 1/3] lglock: remove unused DEFINE_LGLOCK

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Date:	Tue, 9 Oct 2012 11:46:38 +0800
From:	Lai Jiangshan <laijs@...fujitsu.com>
To:	linux-kernel@...r.kernel.org
Cc:	Lai Jiangshan <laijs@...fujitsu.com>,
	Al Viro <viro@...iv.linux.org.uk>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Andi Kleen <ak@...ux.intel.com>
Subject: [PATCH 1/3] lglock: remove unused DEFINE_LGLOCK_LOCKDEP()

struct lglocks use their own lock_key/lock_dep_map which are defined
in struct lglock. DEFINE_LGLOCK_LOCKDEP() is unused now, so we remove it
and save a small piece of memory.

Signed-off-by: Lai Jiangshan <laijs@...fujitsu.com>
---
 include/linux/lglock.h |    9 ---------
 1 files changed, 0 insertions(+), 9 deletions(-)

diff --git a/include/linux/lglock.h b/include/linux/lglock.h
index f01e5f6..45eff71 100644
--- a/include/linux/lglock.h
+++ b/include/linux/lglock.h
@@ -36,16 +36,8 @@
 
 #ifdef CONFIG_DEBUG_LOCK_ALLOC
 #define LOCKDEP_INIT_MAP lockdep_init_map
-
-#define DEFINE_LGLOCK_LOCKDEP(name)					\
- struct lock_class_key name##_lock_key;					\
- struct lockdep_map name##_lock_dep_map;				\
- EXPORT_SYMBOL(name##_lock_dep_map)
-
 #else
 #define LOCKDEP_INIT_MAP(a, b, c, d)
-
-#define DEFINE_LGLOCK_LOCKDEP(name)
 #endif
 
 struct lglock {
@@ -57,7 +49,6 @@ struct lglock {
 };
 
 #define DEFINE_LGLOCK(name)						\
-	DEFINE_LGLOCK_LOCKDEP(name);					\
 	DEFINE_PER_CPU(arch_spinlock_t, name ## _lock)			\
 	= __ARCH_SPIN_LOCK_UNLOCKED;					\
 	struct lglock name = { .lock = &name ## _lock }
-- 
1.7.4.4

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