[PATCH 2/4] devpts: free sb->s_fs_info after shutting down the super block

[Christoph Hellwig <hch@lst.de>]

sb->s_fs_info can only be safely freed after generic_shutdown_super was
called and all access to the super_block has stopped.

Thus only free the private data after calling kill_litter_super, which
calls generic_shutdown_super internally.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 fs/devpts/inode.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/devpts/inode.c b/fs/devpts/inode.c
index 299c295a27a03e..d46cea36c026ad 100644
--- a/fs/devpts/inode.c
+++ b/fs/devpts/inode.c
@@ -491,10 +491,10 @@ static void devpts_kill_sb(struct super_block *sb)
 {
 	struct pts_fs_info *fsi = DEVPTS_SB(sb);
 
+	kill_litter_super(sb);
 	if (fsi)
 		ida_destroy(&fsi->allocated_ptys);
 	kfree(fsi);
-	kill_litter_super(sb);
 }
 
 static struct file_system_type devpts_fs_type = {
-- 
2.39.2