drm/i915: Rename intel_context[engine].ringbuf

[deliverable/linux.git] / fs / namei.c

diff --git a/fs/namei.c b/fs/namei.c
index 4c4f95ac8aa5d535c1e919b4bbc9c394010bd88d..6a82fb7e21273ca457f583da77af8b2cae9f0a81 100644 (file)
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -1416,21 +1416,28 @@ static void follow_mount(struct path *path)
        }
 }
 
+static int path_parent_directory(struct path *path)
+{
+       struct dentry *old = path->dentry;
+       /* rare case of legitimate dget_parent()... */
+       path->dentry = dget_parent(path->dentry);
+       dput(old);
+       if (unlikely(!path_connected(path)))
+               return -ENOENT;
+       return 0;
+}
+
 static int follow_dotdot(struct nameidata *nd)
 {
        while(1) {
-               struct dentry *old = nd->path.dentry;
-
                if (nd->path.dentry == nd->root.dentry &&
                    nd->path.mnt == nd->root.mnt) {
                        break;
                }
                if (nd->path.dentry != nd->path.mnt->mnt_root) {
-                       /* rare case of legitimate dget_parent()... */
-                       nd->path.dentry = dget_parent(nd->path.dentry);
-                       dput(old);
-                       if (unlikely(!path_connected(&nd->path)))
-                               return -ENOENT;
+                       int ret = path_parent_directory(&nd->path);
+                       if (ret)
+                               return ret;
                        break;
                }
                if (!follow_up(&nd->path))
@@ -2514,6 +2521,34 @@ struct dentry *lookup_one_len_unlocked(const char *name,
 }
 EXPORT_SYMBOL(lookup_one_len_unlocked);
 
+#ifdef CONFIG_UNIX98_PTYS
+int path_pts(struct path *path)
+{
+       /* Find something mounted on "pts" in the same directory as
+        * the input path.
+        */
+       struct dentry *child, *parent;
+       struct qstr this;
+       int ret;
+
+       ret = path_parent_directory(path);
+       if (ret)
+               return ret;
+
+       parent = path->dentry;
+       this.name = "pts";
+       this.len = 3;
+       child = d_hash_and_lookup(parent, &this);
+       if (!child)
+               return -ENOENT;
+
+       path->dentry = child;
+       dput(parent);
+       follow_mount(path);
+       return 0;
+}
+#endif
+
 int user_path_at_empty(int dfd, const char __user *name, unsigned flags,
                 struct path *path, int *empty)
 {