__detach_mounts(): lookup_mountpoint() can't return ERR_PTR() anymore

... not since 1e9c75fb9c47 ("mnt: fix __detach_mounts infinite loop")

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --git a/fs/namespace.c b/fs/namespace.c
index 6fbc912..746e3fd 100644 (file)
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -1625,7 +1625,7 @@ void __detach_mounts(struct dentry *dentry)
        namespace_lock();
        lock_mount_hash();
        mp = lookup_mountpoint(dentry);
-       if (IS_ERR_OR_NULL(mp))
+       if (!mp)
                goto out_unlock;
 
        event++;