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| author | Mikulas Patocka <mikulas@artax.karlin.mff.cuni.cz> | 2011-05-08 20:42:54 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-05-09 09:04:23 -0700 |
| commit | 7dd29d8d865efdb00c0542a5d2c87af8c52ea6c7 (patch) | |
| tree | 71f404ed317e2d1b689af088ece1c32c3b1535c8 /fs/hpfs/super.c | |
| parent | 637b424bf8747e50bab6648ab919632d6efd6c28 (diff) | |
| download | linux-stable-7dd29d8d865efdb00c0542a5d2c87af8c52ea6c7.tar.gz linux-stable-7dd29d8d865efdb00c0542a5d2c87af8c52ea6c7.tar.bz2 linux-stable-7dd29d8d865efdb00c0542a5d2c87af8c52ea6c7.zip | |
HPFS: Introduce a global mutex and lock it on every callback from VFS.
Introduce a global mutex and lock it on every callback from VFS.
Performance doesn't matter, reviewing the whole code for locking correctness
would be too complicated, so simply lock it all.
Signed-off-by: Mikulas Patocka <mikulas@artax.karlin.mff.cuni.cz>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/hpfs/super.c')
| -rw-r--r-- | fs/hpfs/super.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/fs/hpfs/super.c b/fs/hpfs/super.c index 501ea86e40a4..41232c2d60dc 100644 --- a/fs/hpfs/super.c +++ b/fs/hpfs/super.c @@ -102,9 +102,12 @@ static void hpfs_put_super(struct super_block *s) { struct hpfs_sb_info *sbi = hpfs_sb(s); + hpfs_lock(s); + unmark_dirty(s); + hpfs_unlock(s); + kfree(sbi->sb_cp_table); kfree(sbi->sb_bmp_dir); - unmark_dirty(s); s->s_fs_info = NULL; kfree(sbi); } @@ -490,6 +493,9 @@ static int hpfs_fill_super(struct super_block *s, void *options, int silent) sbi->sb_bmp_dir = NULL; sbi->sb_cp_table = NULL; + mutex_init(&sbi->hpfs_mutex); + hpfs_lock(s); + mutex_init(&sbi->hpfs_creation_de); uid = current_uid(); @@ -669,6 +675,7 @@ static int hpfs_fill_super(struct super_block *s, void *options, int silent) root->i_blocks = 5; hpfs_brelse4(&qbh); } + hpfs_unlock(s); return 0; bail4: brelse(bh2); @@ -676,6 +683,7 @@ bail3: brelse(bh1); bail2: brelse(bh0); bail1: bail0: + hpfs_unlock(s); kfree(sbi->sb_bmp_dir); kfree(sbi->sb_cp_table); s->s_fs_info = NULL; |