enable passing fast relative symlinks without dropping out of RCU mode (8c1b4566) · Commits · e / devices / android_kernel_fairphone_FP3

fs/namei.c

+8 −5

Original line number	Diff line number	Diff line
		@@ -975,11 +975,6 @@ const char get_link(struct nameidata nd)
		touch_atime(&last->link);
		}

		if (nd->flags & LOOKUP_RCU) {
		if (unlikely(unlazy_walk(nd, NULL, 0)))
		return ERR_PTR(-ECHILD);
		}

		error = security_inode_follow_link(dentry, inode,
		nd->flags & LOOKUP_RCU);
		if (unlikely(error))
		@@ -988,6 +983,10 @@ const char get_link(struct nameidata nd)
		nd->last_type = LAST_BIND;
		res = inode->i_link;
		if (!res) {
		if (nd->flags & LOOKUP_RCU) {
		if (unlikely(unlazy_walk(nd, NULL, 0)))
		return ERR_PTR(-ECHILD);
		}
		res = inode->i_op->follow_link(dentry, &last->cookie);
		if (IS_ERR_OR_NULL(res)) {
		last->cookie = NULL;
		@@ -995,6 +994,10 @@ const char get_link(struct nameidata nd)
		}
		}
		if (*res == '/') {
		if (nd->flags & LOOKUP_RCU) {
		if (unlikely(unlazy_walk(nd, NULL, 0)))
		return ERR_PTR(-ECHILD);
		}
		if (!nd->root.mnt)
		set_root(nd);
		path_put(&nd->path);