push BKL down into ->put_super

Move BKL into ->put_super from the only caller.  A couple of
filesystems had trivial enough ->put_super (only kfree and NULLing of
s_fs_info + stuff in there) to not get any locking: coda, cramfs, efs,
hugetlbfs, omfs, qnx4, shmem, all others got the full treatment.  Most
of them probably don't need it, but I'd rather sort that out individually.
Preferably after all the other BKL pushdowns in that area.

[AV: original used to move lock_super() down as well; these changes are
removed since we don't do lock_super() at all in generic_shutdown_super()
now]
[AV: fuse, btrfs and xfs are known to need no damn BKL, exempt]

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 3 insertions, 1 deletions

diff --git a/fs/minix/inode.c b/fs/minix/inode.c
index daad3c2740db..7eb53970f4bc 100644
--- a/fs/minix/inode.c
+++ b/fs/minix/inode.c
@@ -35,6 +35,8 @@ static void minix_put_super(struct super_block *sb)
         int i;
         struct minix_sb_info *sbi = minix_sb(sb);
 
+        lock_kernel();
+
         if (!(sb->s_flags & MS_RDONLY)) {
                 if (sbi->s_version != MINIX_V3)  /* s_state is now out from V3 sb */
                         sbi->s_ms->s_state = sbi->s_mount_state;
@@ -49,7 +51,7 @@ static void minix_put_super(struct super_block *sb)
         sb->s_fs_info = NULL;
         kfree(sbi);
 
-        return;
+        unlock_kernel();
 }
 
 static struct kmem_cache * minix_inode_cachep;