From d498b25a4f877be535246c4e5b6ee5890781a477 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Fri, 5 Feb 2010 02:21:06 -0500 Subject: [PATCH] get rid of useless vfsmount_lock use in put_mnt_ns() It hadn't been needed since we'd sanitized the logics in mark_mounts_for_expiry() (which, in turn, used to be a rudiment of bad old times when namespace_sem was per-ns). Signed-off-by: Al Viro --- fs/namespace.c | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-) diff --git a/fs/namespace.c b/fs/namespace.c index 970fe79d7867..b0b15cc2117c 100644 --- a/fs/namespace.c +++ b/fs/namespace.c @@ -2344,17 +2344,13 @@ void __init mnt_init(void) void put_mnt_ns(struct mnt_namespace *ns) { - struct vfsmount *root; LIST_HEAD(umount_list); - if (!atomic_dec_and_lock(&ns->count, &vfsmount_lock)) + if (!atomic_dec_and_test(&ns->count)) return; - root = ns->root; - ns->root = NULL; - spin_unlock(&vfsmount_lock); down_write(&namespace_sem); spin_lock(&vfsmount_lock); - umount_tree(root, 0, &umount_list); + umount_tree(ns->root, 0, &umount_list); spin_unlock(&vfsmount_lock); up_write(&namespace_sem); release_mounts(&umount_list);