vfs: spread struct mount - __lookup_mnt() result

switch __lookup_mnt() to returning struct mount *; callers adjusted.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/internal.h b/fs/internal.h
index 7b1cb15..6aab61a 100644
--- a/fs/internal.h
+++ b/fs/internal.h
@@ -15,6 +15,7 @@
 struct file_system_type;
 struct linux_binprm;
 struct path;
+struct mount;
 
 /*
  * block_dev.c
@@ -46,7 +47,6 @@
 extern int copy_mount_options(const void __user *, unsigned long *);
 extern int copy_mount_string(const void __user *, char **);
 
-extern struct vfsmount *__lookup_mnt(struct vfsmount *, struct dentry *, int);
 extern struct vfsmount *lookup_mnt(struct path *);
 extern int finish_automount(struct vfsmount *, struct path *);