[PATCH] drm/exynos/gem: Fix printk specifier for gem_object.size and dma_addr

[PATCH] drm/exynos/gem: Fix printk specifier for gem_object.size and dma_addr

[Chen-Yu Tsai]

In the recent change to use the GEM base object's size field instead of
the exynos_gem object's additional field, the printk format was not
adjusted for the change to size_t type. This causes a new warning on
platforms on which size_t is not unsigned long.

Fix this by using the correct "%zx" type.

While at it, fix the specifier for dma_addr so that the cast to unsigned
long is not longer needed.

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202604081331.jSJQSVmg-lkp@intel.com/
Fixes: 11e898373fba ("drm/exynos: Drop exynos_drm_gem.size field")
Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
---
This is only compile tested. Build for ARM 32-bit confirms the warning
is fixed. Sorry for the noise.

The commit hash used in the Fixes tag is the current one seen in
exynos-drm-next.
---
 drivers/gpu/drm/exynos/exynos_drm_gem.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/exynos/exynos_drm_gem.c b/drivers/gpu/drm/exynos/exynos_drm_gem.c
index d9d42809a1a9..f264e170bc26 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_gem.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_gem.c
@@ -66,8 +66,8 @@ static int exynos_drm_alloc_buf(struct exynos_drm_gem *exynos_gem, bool kvmap)
 	if (kvmap)
 		exynos_gem->kvaddr = exynos_gem->cookie;
 
-	DRM_DEV_DEBUG_KMS(drm_dev_dma_dev(dev), "dma_addr(0x%lx), size(0x%lx)\n",
-			(unsigned long)exynos_gem->dma_addr, exynos_gem->base.size);
+	DRM_DEV_DEBUG_KMS(drm_dev_dma_dev(dev), "dma_addr(%pad), size(0x%zx)\n",
+			  &exynos_gem->dma_addr, exynos_gem->base.size);
 	return 0;
 }
 
@@ -80,8 +80,8 @@ static void exynos_drm_free_buf(struct exynos_drm_gem *exynos_gem)
 		return;
 	}
 
-	DRM_DEV_DEBUG_KMS(dev->dev, "dma_addr(0x%lx), size(0x%lx)\n",
-			(unsigned long)exynos_gem->dma_addr, exynos_gem->base.size);
+	DRM_DEV_DEBUG_KMS(dev->dev, "dma_addr(%pad), size(0x%zx)\n",
+			  &exynos_gem->dma_addr, exynos_gem->base.size);
 
 	dma_free_attrs(drm_dev_dma_dev(dev), exynos_gem->base.size, exynos_gem->cookie,
 			(dma_addr_t)exynos_gem->dma_addr,
-- 
2.53.0.1213.gd9a14994de-goog

Re: [PATCH] drm/exynos/gem: Fix printk specifier for gem_object.size and dma_addr

[Marek Szyprowski]

On 08.04.2026 08:49, Chen-Yu Tsai wrote:
> In the recent change to use the GEM base object's size field instead of
> the exynos_gem object's additional field, the printk format was not
> adjusted for the change to size_t type. This causes a new warning on
> platforms on which size_t is not unsigned long.
>
> Fix this by using the correct "%zx" type.
>
> While at it, fix the specifier for dma_addr so that the cast to unsigned
> long is not longer needed.
>
> Reported-by: kernel test robot <lkp@intel.com>
> Closes: https://lore.kernel.org/oe-kbuild-all/202604081331.jSJQSVmg-lkp@intel.com/
> Fixes: 11e898373fba ("drm/exynos: Drop exynos_drm_gem.size field")
> Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>

Acked-by: Marek Szyprowski <m.szyprowski@samsung.com>


> ---
> This is only compile tested. Build for ARM 32-bit confirms the warning
> is fixed. Sorry for the noise.
>
> The commit hash used in the Fixes tag is the current one seen in
> exynos-drm-next.
> ---
>  drivers/gpu/drm/exynos/exynos_drm_gem.c | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/gpu/drm/exynos/exynos_drm_gem.c b/drivers/gpu/drm/exynos/exynos_drm_gem.c
> index d9d42809a1a9..f264e170bc26 100644
> --- a/drivers/gpu/drm/exynos/exynos_drm_gem.c
> +++ b/drivers/gpu/drm/exynos/exynos_drm_gem.c
> @@ -66,8 +66,8 @@ static int exynos_drm_alloc_buf(struct exynos_drm_gem *exynos_gem, bool kvmap)
>  	if (kvmap)
>  		exynos_gem->kvaddr = exynos_gem->cookie;
>  
> -	DRM_DEV_DEBUG_KMS(drm_dev_dma_dev(dev), "dma_addr(0x%lx), size(0x%lx)\n",
> -			(unsigned long)exynos_gem->dma_addr, exynos_gem->base.size);
> +	DRM_DEV_DEBUG_KMS(drm_dev_dma_dev(dev), "dma_addr(%pad), size(0x%zx)\n",
> +			  &exynos_gem->dma_addr, exynos_gem->base.size);
>  	return 0;
>  }
>  
> @@ -80,8 +80,8 @@ static void exynos_drm_free_buf(struct exynos_drm_gem *exynos_gem)
>  		return;
>  	}
>  
> -	DRM_DEV_DEBUG_KMS(dev->dev, "dma_addr(0x%lx), size(0x%lx)\n",
> -			(unsigned long)exynos_gem->dma_addr, exynos_gem->base.size);
> +	DRM_DEV_DEBUG_KMS(dev->dev, "dma_addr(%pad), size(0x%zx)\n",
> +			  &exynos_gem->dma_addr, exynos_gem->base.size);
>  
>  	dma_free_attrs(drm_dev_dma_dev(dev), exynos_gem->base.size, exynos_gem->cookie,
>  			(dma_addr_t)exynos_gem->dma_addr,

Best regards
-- 
Marek Szyprowski, PhD
Samsung R&D Institute Poland