[PATCH] NFS: switch back to using kill_anon_super

[Christoph Hellwig <hch@lst.de>]

NFS switch to open coding kill_anon_super in 7b14a213890a
("nfs: don't call bdi_unregister") to avoid the extra bdi_unregister
call.  At that point bdi_destroy was called in nfs_free_server and
thus it required a later freeing of the anon dev_t.  But since
0db10944a76b ("nfs: Convert to separately allocated bdi") the bdi has
been free implicitly by the sb destruction, so this isn't needed
anymore.

By not open coding kill_anon_super, nfs now inherits the fix in
dc3216b14160 ("super: ensure valid info"), and we remove the only
open coded version of kill_anon_super.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 fs/nfs/super.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index 2284f749d89246..0d6473cb00cb3e 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -1339,15 +1339,13 @@ int nfs_get_tree_common(struct fs_context *fc)
 void nfs_kill_super(struct super_block *s)
 {
 	struct nfs_server *server = NFS_SB(s);
-	dev_t dev = s->s_dev;
 
 	nfs_sysfs_move_sb_to_server(server);
-	generic_shutdown_super(s);
+	kill_anon_super(s);
 
 	nfs_fscache_release_super_cookie(s);
 
 	nfs_free_server(server);
-	free_anon_bdev(dev);
 }
 EXPORT_SYMBOL_GPL(nfs_kill_super);
 
-- 
2.39.2