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path: root/fs/kernfs/dir.c
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Diffstat (limited to 'fs/kernfs/dir.c')
-rw-r--r--fs/kernfs/dir.c27
1 files changed, 17 insertions, 10 deletions
diff --git a/fs/kernfs/dir.c b/fs/kernfs/dir.c
index f8cbd05e9b68..c9323956c63c 100644
--- a/fs/kernfs/dir.c
+++ b/fs/kernfs/dir.c
@@ -1305,6 +1305,21 @@ static struct kernfs_node *kernfs_next_descendant_post(struct kernfs_node *pos,
return pos->parent;
}
+static void kernfs_activate_one(struct kernfs_node *kn)
+{
+ lockdep_assert_held_write(&kernfs_root(kn)->kernfs_rwsem);
+
+ kn->flags |= KERNFS_ACTIVATED;
+
+ if (kernfs_active(kn) || (kn->flags & KERNFS_REMOVING))
+ return;
+
+ WARN_ON_ONCE(kn->parent && RB_EMPTY_NODE(&kn->rb));
+ WARN_ON_ONCE(atomic_read(&kn->active) != KN_DEACTIVATED_BIAS);
+
+ atomic_sub(KN_DEACTIVATED_BIAS, &kn->active);
+}
+
/**
* kernfs_activate - activate a node which started deactivated
* @kn: kernfs_node whose subtree is to be activated
@@ -1326,16 +1341,8 @@ void kernfs_activate(struct kernfs_node *kn)
down_write(&root->kernfs_rwsem);
pos = NULL;
- while ((pos = kernfs_next_descendant_post(pos, kn))) {
- if (kernfs_active(pos) || (pos->flags & KERNFS_REMOVING))
- continue;
-
- WARN_ON_ONCE(pos->parent && RB_EMPTY_NODE(&pos->rb));
- WARN_ON_ONCE(atomic_read(&pos->active) != KN_DEACTIVATED_BIAS);
-
- atomic_sub(KN_DEACTIVATED_BIAS, &pos->active);
- pos->flags |= KERNFS_ACTIVATED;
- }
+ while ((pos = kernfs_next_descendant_post(pos, kn)))
+ kernfs_activate_one(pos);
up_write(&root->kernfs_rwsem);
}