[PATCH 1/8] drm/i915/gtt: No need to zero the table for page dirs

[Mika Kuoppala]

We set them to scratch right after allocation so prevent
useless zeroing before.

v2: zero in __pdp_init

Cc: Chris Wilson <chris at chris-wilson.co.uk>
Signed-off-by: Mika Kuoppala <mika.kuoppala at linux.intel.com>
Reviewed-by: Chris Wilson <chris at chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/i915_gem_gtt.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index 2e15850bd987..6d0bc741e68f 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -685,7 +685,7 @@ 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);
 
@@ -724,6 +724,8 @@ static int __pdp_init(struct i915_address_space *vm,
 	if (unlikely(!pdp->page_directory))
 		return -ENOMEM;
 
+	pdp->used_pdpes = 0;
+
 	memset_p((void **)pdp->page_directory, vm->scratch_pd, pdpes);
 
 	atomic_set(&pdp->used_pdpes, 0);
@@ -745,7 +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);
 	if (!pdp)
 		return ERR_PTR(-ENOMEM);
 
-- 
2.17.1