aboutsummaryrefslogtreecommitdiffstats
path: root/fs/ext2/inode.c
diff options
context:
space:
mode:
authorJan Blunck <jblunck@suse.de>2010-04-14 14:38:38 +0200
committerJan Kara <jack@suse.cz>2010-05-21 19:30:39 +0200
commitc15271f4e74cd6dbdf461335d6d1450949c4b956 (patch)
tree585738bde9a80e580686072d02cd6c1e5d261c1e /fs/ext2/inode.c
parent4c96a68bfc110d87b28bcee4c395a7b4d26ed67a (diff)
ext2: Add ext2_sb_info s_lock spinlock
Add a spinlock that protects against concurrent modifications of s_mount_state, s_blocks_last, s_overhead_last and the content of the superblock's buffer pointed to by sbi->s_es. The spinlock is now used in ext2_xattr_update_super_block() which was setting the EXT2_FEATURE_COMPAT_EXT_ATTR flag on the superblock without protection before. Likewise the spinlock is used in ext2_show_options() to have a consistent view of the mount options. This is a preparation patch for removing the BKL from ext2 in the next patch. Signed-off-by: Jan Blunck <jblunck@suse.de> Cc: Andi Kleen <andi@firstfloor.org> Cc: Jan Kara <jack@suse.cz> Cc: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/ext2/inode.c')
-rw-r--r--fs/ext2/inode.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c
index fc13cc119aa..5d15442abbd 100644
--- a/fs/ext2/inode.c
+++ b/fs/ext2/inode.c
@@ -1407,9 +1407,11 @@ static int __ext2_write_inode(struct inode *inode, int do_sync)
* 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);
}