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| author | Jan Blunck <jblunck@suse.de> | 2010-04-14 14:38:39 +0200 |
|---|---|---|
| committer | Jan Kara <jack@suse.cz> | 2010-05-21 19:30:40 +0200 |
| commit | e0a5cbac029db69032758000c67465c2ed7a5736 (patch) | |
| tree | 14d81b8fee8d43674acd4c63a2e994bdc3da774c /fs/ext2/inode.c | |
| parent | c15271f4e74cd6dbdf461335d6d1450949c4b956 (diff) | |
| download | blackbird-op-linux-e0a5cbac029db69032758000c67465c2ed7a5736.tar.gz blackbird-op-linux-e0a5cbac029db69032758000c67465c2ed7a5736.zip | |
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.c | 3 |
1 files changed, 0 insertions, 3 deletions
diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c index 5d15442abbd0..b90c3bf6e9ba 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); } } |
