# \[PATCH 2/4\] drm: remove dead WARN\_ON NULL check after GFP\_NOFAIL allocation

- From: Gou Hao \<hidden\>
- Date: 2026-07-23 08:19:13 
- List: linuxppc-dev
- Page: https://ratatoskr.run/linuxppc-dev/2026/07/17308388
- Thread: https://ratatoskr.run/linuxppc-dev/2026/07/17308385/t.md

```text
kzalloc_obj with the __GFP_NOFAIL flag will never return NULL, so the
subsequent WARN_ON(!ctx) is unreachable dead code. Remove it.

Signed-off-by: Gou Hao <redacted>
---
 drivers/gpu/drm/drm_modeset_lock.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/drivers/gpu/drm/drm_modeset_lock.c b/drivers/gpu/drm/drm_modeset_lock.c
index 2c806b0146d6..e14814c30d8c 100644
--- a/drivers/gpu/drm/drm_modeset_lock.c
+++ b/drivers/gpu/drm/drm_modeset_lock.c
@@ -149,11 +149,7 @@ void drm_modeset_lock_all(struct drm_device *dev)
 	int ret;
 
 	ctx = kzalloc_obj(*ctx, GFP_KERNEL | __GFP_NOFAIL);
-	if (WARN_ON(!ctx))
-		return;
-
 	mutex_lock(&config->mutex);
-
 	drm_modeset_acquire_init(ctx, 0);
 
 retry:
-- 
2.20.1


```