follow_automount(): get rid of dead^Wstillborn code
1) no instances of ->d_automount() have ever made use of the "return
ERR_PTR(-EISDIR) if you don't feel like mounting anything" - that's
a rudiment of plans that got superseded before the thing went into
the tree. Despite the comment in follow_automount(), autofs has
never done that.
2) if there's no ->d_automount() in dentry_operations, filesystems
should not set DCACHE_NEED_AUTOMOUNT in the first place. None have
ever done so...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/namespace.c b/fs/namespace.c
index 777c311..7439803 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -2824,9 +2824,16 @@ static int do_new_mount(struct path *path, const char *fstype, int sb_flags,
int finish_automount(struct vfsmount *m, struct path *path)
{
struct dentry *dentry = path->dentry;
- struct mount *mnt = real_mount(m);
struct mountpoint *mp;
+ struct mount *mnt;
int err;
+
+ if (!m)
+ return 0;
+ if (IS_ERR(m))
+ return PTR_ERR(m);
+
+ mnt = real_mount(m);
/* The new mount record should have at least 2 refs to prevent it being
* expired before we get a chance to add it
*/