Get root safely after kn is ensureed to be not null.
Signed-off-by: Peng Wang <[email protected]>
---
fs/kernfs/dir.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/fs/kernfs/dir.c b/fs/kernfs/dir.c
index a387534c9577..ea3fc972c48b 100644
--- a/fs/kernfs/dir.c
+++ b/fs/kernfs/dir.c
@@ -430,7 +430,7 @@ struct kernfs_node *kernfs_get_active(struct kernfs_node
*kn)
*/
void kernfs_put_active(struct kernfs_node *kn)
{
- struct kernfs_root *root = kernfs_root(kn);
+ struct kernfs_root *root;
int v;
if (unlikely(!kn))
@@ -442,6 +442,7 @@ void kernfs_put_active(struct kernfs_node *kn)
if (likely(v != KN_DEACTIVATED_BIAS))
return;
+ root = kernfs_root(kn);
wake_up_all(&root->deactivate_waitq);
}
--
2.19.1
