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authorJan Blunck <jblunck@suse.de>2010-04-14 14:38:39 +0200
committerJan Kara <jack@suse.cz>2010-05-21 19:30:40 +0200
commite0a5cbac029db69032758000c67465c2ed7a5736 (patch)
tree14d81b8fee8d43674acd4c63a2e994bdc3da774c /fs/ext2/inode.c
parentc15271f4e74cd6dbdf461335d6d1450949c4b956 (diff)
BKL: Remove BKL from ext2 filesystem
The BKL is still used in ext2_put_super(), ext2_fill_super(), ext2_sync_fs() ext2_remount() and ext2_write_inode(). From these calls ext2_put_super(), ext2_fill_super() and ext2_remount() are protected against each other by the struct super_block s_umount rw semaphore. The call in ext2_write_inode() could only protect the modification of the ext2_sb_info through ext2_update_dynamic_rev() against concurrent ext2_sync_fs() or ext2_remount(). ext2_fill_super() and ext2_put_super() can be left out because you need a valid filesystem reference in all three cases, which you do not have when you are one of these functions. If the BKL is only protecting the modification of the ext2_sb_info it can safely be removed since this is protected by the struct ext2_sb_info s_lock. Signed-off-by: Jan Blunck <jblunck@suse.de> Cc: Jan Kara <jack@suse.cz> Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/ext2/inode.c')
-rw-r--r--fs/ext2/inode.c3
1 files changed, 0 insertions, 3 deletions
diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c
index 5d15442abbd..b90c3bf6e9b 100644
--- a/fs/ext2/inode.c
+++ b/fs/ext2/inode.c
@@ -22,7 +22,6 @@
* Assorted race fixes, rewrite of ext2_get_block() by Al Viro, 2000
*/
-#include <linux/smp_lock.h>
#include <linux/time.h>
#include <linux/highuid.h>
#include <linux/pagemap.h>
@@ -1406,13 +1405,11 @@ static int __ext2_write_inode(struct inode *inode, int do_sync)
/* If this is the first large file
* created, add a flag to the superblock.
*/
- lock_kernel();
spin_lock(&EXT2_SB(sb)->s_lock);
ext2_update_dynamic_rev(sb);
EXT2_SET_RO_COMPAT_FEATURE(sb,
EXT2_FEATURE_RO_COMPAT_LARGE_FILE);
spin_unlock(&EXT2_SB(sb)->s_lock);
- unlock_kernel();
ext2_write_super(sb);
}
}