linux-kernel - [PATCH 3/3] lglock: add DEFINE_STATIC

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Date:	Tue, 9 Oct 2012 11:46:40 +0800
From:	Lai Jiangshan <laijs@...fujitsu.com>
To:	linux-kernel@...r.kernel.org
Cc:	Lai Jiangshan <laijs@...fujitsu.com>,
	Alexander Viro <viro@...iv.linux.org.uk>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Andi Kleen <ak@...ux.intel.com>, linux-fsdevel@...r.kernel.org
Subject: [PATCH 3/3] lglock: add DEFINE_STATIC_LGLOCK()

When if the lglock don't to be exported,
we can use DEFINE_STATIC_LGLOCK().

Signed-off-by: Lai Jiangshan <laijs@...fujitsu.com>
---
 fs/file_table.c        |    2 +-
 include/linux/lglock.h |    8 +++++++-
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/fs/file_table.c b/fs/file_table.c
index 701985e..e26fd31 100644
--- a/fs/file_table.c
+++ b/fs/file_table.c
@@ -36,7 +36,7 @@ struct files_stat_struct files_stat = {
 	.max_files = NR_FILE
 };
 
-DEFINE_LGLOCK(files_lglock);
+DEFINE_STATIC_LGLOCK(files_lglock);
 
 /* SLAB cache for file structures */
 static struct kmem_cache *filp_cachep __read_mostly;
diff --git a/include/linux/lglock.h b/include/linux/lglock.h
index 8f97451..0d24e93 100644
--- a/include/linux/lglock.h
+++ b/include/linux/lglock.h
@@ -32,7 +32,8 @@
 #define br_write_lock(name)	lg_global_lock(name)
 #define br_write_unlock(name)	lg_global_unlock(name)
 
-#define DEFINE_BRLOCK(name)	DEFINE_LGLOCK(name)
+#define DEFINE_BRLOCK(name)		DEFINE_LGLOCK(name)
+#define DEFINE_STATIC_BRLOCK(name)	DEFINE_STATIC_LGLOCK(name)
 
 #ifdef CONFIG_DEBUG_LOCK_ALLOC
 #define LOCKDEP_INIT_MAP lockdep_init_map
@@ -53,6 +54,11 @@ struct lglock {
 	= __ARCH_SPIN_LOCK_UNLOCKED;					\
 	struct lglock name = { .lock = &name ## _lock }
 
+#define DEFINE_STATIC_LGLOCK(name)					\
+	static DEFINE_PER_CPU(arch_spinlock_t, name ## _lock)		\
+	= __ARCH_SPIN_LOCK_UNLOCKED;					\
+	static struct lglock name = { .lock = &name ## _lock }
+
 void lg_lock_init(struct lglock *lg, char *name);
 void lg_local_lock(struct lglock *lg);
 void lg_local_unlock(struct lglock *lg);
-- 
1.7.4.4

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