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authorPekka Enberg <penberg@cs.helsinki.fi>2009-01-04 23:00:48 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2009-01-05 00:33:20 +0300
commitc644f0e4b56f9a2fc066cd0d75a18074d130e4a3 (patch)
tree96f5954d7e72a2bf56f4165f4e7569364562f04f /include/linux/blockgroup_lock.h
parent0a30c5cefa53cbac429dcb2de906c0637b646253 (diff)
downloadlinux-c644f0e4b56f9a2fc066cd0d75a18074d130e4a3.tar.xz
fs: introduce bgl_lock_ptr()
As suggested by Andreas Dilger, introduce a bgl_lock_ptr() helper in <linux/blockgroup_lock.h> and add separate sb_bgl_lock() helpers to filesystem specific header files to break the hidden dependency to struct ext[234]_sb_info. Also, while at it, convert the macros to static inlines to try make up for all the times I broke Andrew Morton's tree. Acked-by: Andreas Dilger <adilger@sun.com> Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> Cc: <linux-ext4@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/blockgroup_lock.h')
-rw-r--r--include/linux/blockgroup_lock.h7
1 files changed, 5 insertions, 2 deletions
diff --git a/include/linux/blockgroup_lock.h b/include/linux/blockgroup_lock.h
index 8607312983bd..e44b88ba552b 100644
--- a/include/linux/blockgroup_lock.h
+++ b/include/linux/blockgroup_lock.h
@@ -53,7 +53,10 @@ static inline void bgl_lock_init(struct blockgroup_lock *bgl)
* The accessor is a macro so we can embed a blockgroup_lock into different
* superblock types
*/
-#define sb_bgl_lock(sb, block_group) \
- (&(sb)->s_blockgroup_lock.locks[(block_group) & (NR_BG_LOCKS-1)].lock)
+static inline spinlock_t *
+bgl_lock_ptr(struct blockgroup_lock *bgl, unsigned int block_group)
+{
+ return &bgl->locks[(block_group) & (NR_BG_LOCKS-1)].lock;
+}
#endif