Quoting Mika Kuoppala (2019-06-11 18:27:23)
> We set them to scratch right after allocation so prevent
> useless zeroing before.
>
> v2: atomic_t
>
> Cc: Chris Wilson <ch...@chris-wilson.co.uk>
> Signed-off-by: Mika Kuoppala <mika.kuopp...@linux.intel.com>
> Reviewed-by: Chris Wilson <ch...@chris-wilson.co.uk>
> ---
> drivers/gpu/drm/i915/i915_gem_gtt.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c
> b/drivers/gpu/drm/i915/i915_gem_gtt.c
> index e70675bfb51d..07f86d474fa2 100644
> --- a/drivers/gpu/drm/i915/i915_gem_gtt.c
> +++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
> @@ -687,7 +687,7 @@ static struct i915_page_directory *alloc_pd(struct
> i915_address_space *vm)
> {
> struct i915_page_directory *pd;
>
> - pd = kzalloc(sizeof(*pd), I915_GFP_ALLOW_FAIL);
> + pd = kmalloc(sizeof(*pd), I915_GFP_ALLOW_FAIL);
> if (unlikely(!pd))
> return ERR_PTR(-ENOMEM);
>
> @@ -747,7 +747,7 @@ alloc_pdp(struct i915_address_space *vm)
>
> GEM_BUG_ON(!i915_vm_is_4lvl(vm));
>
> - pdp = kzalloc(sizeof(*pdp), GFP_KERNEL);
> + pdp = kmalloc(sizeof(*pdp), GFP_KERNEL);
While you are here, this too can be I915_GFP_ALLOW_FAIL
> if (!pdp)
> return ERR_PTR(-ENOMEM);
Because we immediately propagate the error and can gracefully handle
failures.
-Chris
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