Merge branch 'work.lookup' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

Pull proc_fill_cache regression fix from Al Viro:
 "Regression fix for proc_fill_cache() braino introduced when switching
  instantiate() callback to d_splice_alias()"

* 'work.lookup' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  fix proc_fill_cache() in case of d_alloc_parallel() failure

Author: torvalds

fs/proc/base.c

@@ -1866,19 +1866,19 @@ bool proc_fill_cache(struct file *file, struct dir_context *ctx,
 			struct dentry *res;
 			res = instantiate(child, task, ptr);
 			d_lookup_done(child);
-			if (IS_ERR(res))
-				goto end_instantiate;
 			if (unlikely(res)) {
 				dput(child);
 				child = res;
+				if (IS_ERR(child))
+					goto end_instantiate;
 			}
 		}
 	}
 	inode = d_inode(child);
 	ino = inode->i_ino;
 	type = inode->i_mode >> 12;
-end_instantiate:
 	dput(child);
+end_instantiate:
 	return dir_emit(ctx, name, len, ino, type);
 }