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push BKL down into ->put_super

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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 <[email protected]>
Signed-off-by: Al Viro <[email protected]>
This commit is contained in:
Christoph Hellwig 2009-05-05 15:40:36 +02:00 • committed by Al Viro
commit 6cfd014842
33 changed files with 133 additions and 12 deletions
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4
fs/gfs2/super.c
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@ -719,6 +719,8 @@ static void gfs2_put_super(struct super_block *sb)
int error;
struct gfs2_jdesc *jd;
lock_kernel();
/* Unfreeze the filesystem, if we need to */
mutex_lock(&sdp->sd_freeze_lock);
@ -785,6 +787,8 @@ restart:
/* At this point, we're through participating in the lockspace */
gfs2_sys_fs_del(sdp);
unlock_kernel();
}
/**