[PATCH v2 0/2] drm: remove redundant __GFP_NOWARN

[PATCH v2 0/2] drm: remove redundant __GFP_NOWARN

[Qianfeng Rong]

Commit 16f5dfbc851b ("gfp: include __GFP_NOWARN in GFP_NOWAIT") made
GFP_NOWAIT implicitly include __GFP_NOWARN.

Therefore, explicit __GFP_NOWARN combined with GFP_NOWAIT (e.g.,
`GFP_NOWAIT | __GFP_NOWARN`) is now redundant.  Let's clean up these
redundant flags across subsystems.

No functional changes.

Qianfeng Rong (2):
  drm/locking: remove redundant __GFP_NOWARN
  drm/i915: remove redundant __GFP_NOWARN

 drivers/gpu/drm/drm_modeset_lock.c               | 4 ++--
 drivers/gpu/drm/i915/gt/intel_engine_heartbeat.c | 4 ++--
 drivers/gpu/drm/i915/i915_active.c               | 2 +-
 3 files changed, 5 insertions(+), 5 deletions(-)

-- 
2.34.1

[PATCH v2 1/2] drm/locking: remove redundant __GFP_NOWARN

[Qianfeng Rong]

GFP_NOWAIT already includes __GFP_NOWARN, so let's remove the redundant
__GFP_NOWARN.

Signed-off-by: Qianfeng Rong <rongqianfeng@vivo.com>
---
 drivers/gpu/drm/drm_modeset_lock.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/drm_modeset_lock.c b/drivers/gpu/drm/drm_modeset_lock.c
index beb91a13a312..58eac20a8138 100644
--- a/drivers/gpu/drm/drm_modeset_lock.c
+++ b/drivers/gpu/drm/drm_modeset_lock.c
@@ -88,7 +88,7 @@ static noinline depot_stack_handle_t __drm_stack_depot_save(void)
 
 	n = stack_trace_save(entries, ARRAY_SIZE(entries), 1);
 
-	return stack_depot_save(entries, n, GFP_NOWAIT | __GFP_NOWARN);
+	return stack_depot_save(entries, n, GFP_NOWAIT);
 }
 
 static void __drm_stack_depot_print(depot_stack_handle_t stack_depot)
@@ -98,7 +98,7 @@ static void __drm_stack_depot_print(depot_stack_handle_t stack_depot)
 	unsigned int nr_entries;
 	char *buf;
 
-	buf = kmalloc(PAGE_SIZE, GFP_NOWAIT | __GFP_NOWARN);
+	buf = kmalloc(PAGE_SIZE, GFP_NOWAIT);
 	if (!buf)
 		return;
 
-- 
2.34.1

[PATCH v2 2/2] drm/i915: remove redundant __GFP_NOWARN

[Qianfeng Rong]

GFP_NOWAIT already includes __GFP_NOWARN, so let's remove the redundant
__GFP_NOWARN.

Signed-off-by: Qianfeng Rong <rongqianfeng@vivo.com>
---
 drivers/gpu/drm/i915/gt/intel_engine_heartbeat.c | 4 ++--
 drivers/gpu/drm/i915/i915_active.c               | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_engine_heartbeat.c b/drivers/gpu/drm/i915/gt/intel_engine_heartbeat.c
index 8d4bb95f8424..22432912db2e 100644
--- a/drivers/gpu/drm/i915/gt/intel_engine_heartbeat.c
+++ b/drivers/gpu/drm/i915/gt/intel_engine_heartbeat.c
@@ -220,7 +220,7 @@ static void heartbeat(struct work_struct *wrk)
 		goto out;
 	}
 
-	rq = heartbeat_create(ce, GFP_NOWAIT | __GFP_NOWARN);
+	rq = heartbeat_create(ce, GFP_NOWAIT);
 	if (IS_ERR(rq))
 		goto unlock;
 
@@ -282,7 +282,7 @@ static int __intel_engine_pulse(struct intel_engine_cs *engine)
 	GEM_BUG_ON(!intel_engine_has_preemption(engine));
 	GEM_BUG_ON(!intel_engine_pm_is_awake(engine));
 
-	rq = heartbeat_create(ce, GFP_NOWAIT | __GFP_NOWARN);
+	rq = heartbeat_create(ce, GFP_NOWAIT);
 	if (IS_ERR(rq))
 		return PTR_ERR(rq);
 
diff --git a/drivers/gpu/drm/i915/i915_active.c b/drivers/gpu/drm/i915/i915_active.c
index 0dbc4e289300..402043cd84d5 100644
--- a/drivers/gpu/drm/i915/i915_active.c
+++ b/drivers/gpu/drm/i915/i915_active.c
@@ -727,7 +727,7 @@ int i915_request_await_active(struct i915_request *rq,
 static int sw_await_fence(void *arg, struct dma_fence *fence)
 {
 	return i915_sw_fence_await_dma_fence(arg, fence, 0,
-					     GFP_NOWAIT | __GFP_NOWARN);
+					     GFP_NOWAIT);
 }
 
 int i915_sw_fence_await_active(struct i915_sw_fence *fence,
-- 
2.34.1

Re: [PATCH v2 2/2] drm/i915: remove redundant __GFP_NOWARN

[Jani Nikula]

On Thu, 07 Aug 2025, Qianfeng Rong <rongqianfeng@vivo.com> wrote:
> GFP_NOWAIT already includes __GFP_NOWARN, so let's remove the redundant
> __GFP_NOWARN.
>
> Signed-off-by: Qianfeng Rong <rongqianfeng@vivo.com>

Reviewed-by: Jani Nikula <jani.nikula@intel.com>

> ---
>  drivers/gpu/drm/i915/gt/intel_engine_heartbeat.c | 4 ++--
>  drivers/gpu/drm/i915/i915_active.c               | 2 +-
>  2 files changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/gt/intel_engine_heartbeat.c b/drivers/gpu/drm/i915/gt/intel_engine_heartbeat.c
> index 8d4bb95f8424..22432912db2e 100644
> --- a/drivers/gpu/drm/i915/gt/intel_engine_heartbeat.c
> +++ b/drivers/gpu/drm/i915/gt/intel_engine_heartbeat.c
> @@ -220,7 +220,7 @@ static void heartbeat(struct work_struct *wrk)
>  		goto out;
>  	}
>  
> -	rq = heartbeat_create(ce, GFP_NOWAIT | __GFP_NOWARN);
> +	rq = heartbeat_create(ce, GFP_NOWAIT);
>  	if (IS_ERR(rq))
>  		goto unlock;
>  
> @@ -282,7 +282,7 @@ static int __intel_engine_pulse(struct intel_engine_cs *engine)
>  	GEM_BUG_ON(!intel_engine_has_preemption(engine));
>  	GEM_BUG_ON(!intel_engine_pm_is_awake(engine));
>  
> -	rq = heartbeat_create(ce, GFP_NOWAIT | __GFP_NOWARN);
> +	rq = heartbeat_create(ce, GFP_NOWAIT);
>  	if (IS_ERR(rq))
>  		return PTR_ERR(rq);
>  
> diff --git a/drivers/gpu/drm/i915/i915_active.c b/drivers/gpu/drm/i915/i915_active.c
> index 0dbc4e289300..402043cd84d5 100644
> --- a/drivers/gpu/drm/i915/i915_active.c
> +++ b/drivers/gpu/drm/i915/i915_active.c
> @@ -727,7 +727,7 @@ int i915_request_await_active(struct i915_request *rq,
>  static int sw_await_fence(void *arg, struct dma_fence *fence)
>  {
>  	return i915_sw_fence_await_dma_fence(arg, fence, 0,
> -					     GFP_NOWAIT | __GFP_NOWARN);
> +					     GFP_NOWAIT);
>  }
>  
>  int i915_sw_fence_await_active(struct i915_sw_fence *fence,

-- 
Jani Nikula, Intel

Re: [PATCH v2 1/2] drm/locking: remove redundant __GFP_NOWARN

[Jani Nikula]

On Thu, 07 Aug 2025, Qianfeng Rong <rongqianfeng@vivo.com> wrote:
> GFP_NOWAIT already includes __GFP_NOWARN, so let's remove the redundant
> __GFP_NOWARN.
>
> Signed-off-by: Qianfeng Rong <rongqianfeng@vivo.com>

Reviewed-by: Jani Nikula <jani.nikula@intel.com>

> ---
>  drivers/gpu/drm/drm_modeset_lock.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_modeset_lock.c b/drivers/gpu/drm/drm_modeset_lock.c
> index beb91a13a312..58eac20a8138 100644
> --- a/drivers/gpu/drm/drm_modeset_lock.c
> +++ b/drivers/gpu/drm/drm_modeset_lock.c
> @@ -88,7 +88,7 @@ static noinline depot_stack_handle_t __drm_stack_depot_save(void)
>  
>  	n = stack_trace_save(entries, ARRAY_SIZE(entries), 1);
>  
> -	return stack_depot_save(entries, n, GFP_NOWAIT | __GFP_NOWARN);
> +	return stack_depot_save(entries, n, GFP_NOWAIT);
>  }
>  
>  static void __drm_stack_depot_print(depot_stack_handle_t stack_depot)
> @@ -98,7 +98,7 @@ static void __drm_stack_depot_print(depot_stack_handle_t stack_depot)
>  	unsigned int nr_entries;
>  	char *buf;
>  
> -	buf = kmalloc(PAGE_SIZE, GFP_NOWAIT | __GFP_NOWARN);
> +	buf = kmalloc(PAGE_SIZE, GFP_NOWAIT);
>  	if (!buf)
>  		return;

-- 
Jani Nikula, Intel