diff options
Diffstat (limited to 'fs/kernfs/dir.c')
| -rw-r--r-- | fs/kernfs/dir.c | 25 |
1 files changed, 4 insertions, 21 deletions
diff --git a/fs/kernfs/dir.c b/fs/kernfs/dir.c index 37dd6408f5f..770d687ee9f 100644 --- a/fs/kernfs/dir.c +++ b/fs/kernfs/dir.c @@ -149,25 +149,12 @@ struct kernfs_node *kernfs_get_active(struct kernfs_node *kn) if (unlikely(!kn)) return NULL; - if (kernfs_lockdep(kn)) - rwsem_acquire_read(&kn->dep_map, 0, 1, _RET_IP_); - - /* - * Try to obtain an active ref. If @kn is deactivated, we block - * till either it's reactivated or killed. - */ - do { - if (atomic_inc_unless_negative(&kn->active)) - return kn; - - wait_event(kernfs_root(kn)->deactivate_waitq, - atomic_read(&kn->active) >= 0 || - RB_EMPTY_NODE(&kn->rb)); - } while (!RB_EMPTY_NODE(&kn->rb)); + if (!atomic_inc_unless_negative(&kn->active)) + return NULL; if (kernfs_lockdep(kn)) - rwsem_release(&kn->dep_map, 1, _RET_IP_); - return NULL; + rwsem_acquire_read(&kn->dep_map, 0, 1, _RET_IP_); + return kn; } /** @@ -799,7 +786,6 @@ static void __kernfs_deactivate(struct kernfs_node *kn) static void __kernfs_remove(struct kernfs_node *kn) { - struct kernfs_root *root = kernfs_root(kn); struct kernfs_node *pos; lockdep_assert_held(&kernfs_mutex); @@ -851,9 +837,6 @@ static void __kernfs_remove(struct kernfs_node *kn) kernfs_put(pos); } while (pos != kn); - - /* some nodes killed, kick get_active waiters */ - wake_up_all(&root->deactivate_waitq); } /** |