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>

1 files changed, 14 insertions, 9 deletions

diff --git a/fs/namespace.c b/fs/namespace.c
index dda47fee6fdf..398eb2421494 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -464,20 +464,20 @@ static void free_vfsmnt(struct vfsmount *mnt)
  * @dir. If @dir is set return the first mount else return the last mount.
  * vfsmount_lock must be held for read or write.
  */
-struct vfsmount *__lookup_mnt(struct vfsmount *mnt, struct dentry *dentry,
+struct mount *__lookup_mnt(struct vfsmount *mnt, struct dentry *dentry,
                               int dir)
 {
         struct list_head *head = mount_hashtable + hash(mnt, dentry);
         struct list_head *tmp = head;
-        struct vfsmount *p, *found = NULL;
+        struct mount *p, *found = NULL;
 
         for (;;) {
                 tmp = dir ? tmp->next : tmp->prev;
                 p = NULL;
                 if (tmp == head)
                         break;
-                p = list_entry(tmp, struct vfsmount, mnt_hash);
-                if (p->mnt_parent == mnt && p->mnt_mountpoint == dentry) {
+                p = list_entry(tmp, struct mount, mnt.mnt_hash);
+                if (p->mnt.mnt_parent == mnt && p->mnt.mnt_mountpoint == dentry) {
                         found = p;
                         break;
                 }
@@ -491,13 +491,18 @@ struct vfsmount *__lookup_mnt(struct vfsmount *mnt, struct dentry *dentry,
  */
 struct vfsmount *lookup_mnt(struct path *path)
 {
-        struct vfsmount *child_mnt;
+        struct mount *child_mnt;
 
         br_read_lock(vfsmount_lock);
-        if ((child_mnt = __lookup_mnt(path->mnt, path->dentry, 1)))
-                mntget(child_mnt);
-        br_read_unlock(vfsmount_lock);
-        return child_mnt;
+        child_mnt = __lookup_mnt(path->mnt, path->dentry, 1);
+        if (child_mnt) {
+                mnt_add_count(child_mnt, 1);
+                br_read_unlock(vfsmount_lock);
+                return &child_mnt->mnt;
+        } else {
+                br_read_unlock(vfsmount_lock);
+                return NULL;
+        }
 }
 
 static inline int check_mnt(struct vfsmount *mnt)