[PATCH 02/19] fs: make ->kill_sb optional

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Call generic_shutdown_super if ->kill_sb is not provided by the file
system.  This can't currently happen but will become common soon.

Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
 fs/super.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/fs/super.c b/fs/super.c
index 127a17d958a482..ab234e6af48605 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -483,7 +483,11 @@ void deactivate_locked_super(struct super_block *s)
 	}
 
 	unregister_shrinker(&s->s_shrink);
-	fs->kill_sb(s);
+
+	if (fs->kill_sb)
+		fs->kill_sb(s);
+	else
+		generic_shutdown_super(s);
 
 	kill_super_notify(s);
 
-- 
2.39.2




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