[Intel-gfx] [PATCH] drm/i915: change node clearing from memset to initialization

[Tom Rix]

In insert_mappable_node(), the parameter node is
cleared late in node's use with memset.
insert_mappable_node() is a singleton, called only
from i915_gem_gtt_prepare() which itself is only
called by i915_gem_gtt_pread() and
i915_gem_gtt_pwrite_fast() where the definition of
node originates.

Instead of using memset, initialize node to 0 at it's
definitions.  And remove unneeded clearing of the flags
element.

Signed-off-by: Tom Rix <t...@redhat.com>
---
 drivers/gpu/drm/i915/i915_gem.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 2e10187cd0a0..7dbd0b325c43 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -69,7 +69,6 @@ insert_mappable_node(struct i915_ggtt *ggtt, struct 
drm_mm_node *node, u32 size)
        if (err)
                return err;
 
-       memset(node, 0, sizeof(*node));
        err = drm_mm_insert_node_in_range(&ggtt->vm.mm, node,
                                          size, 0, I915_COLOR_UNEVICTABLE,
                                          0, ggtt->mappable_end,
@@ -328,7 +327,6 @@ static struct i915_vma *i915_gem_gtt_prepare(struct 
drm_i915_gem_object *obj,
                goto err_ww;
        } else if (!IS_ERR(vma)) {
                node->start = i915_ggtt_offset(vma);
-               node->flags = 0;
        } else {
                ret = insert_mappable_node(ggtt, node, PAGE_SIZE);
                if (ret)
@@ -381,7 +379,7 @@ i915_gem_gtt_pread(struct drm_i915_gem_object *obj,
        struct drm_i915_private *i915 = to_i915(obj->base.dev);
        struct i915_ggtt *ggtt = to_gt(i915)->ggtt;
        intel_wakeref_t wakeref;
-       struct drm_mm_node node;
+       struct drm_mm_node node = {};
        void __user *user_data;
        struct i915_vma *vma;
        u64 remain, offset;
@@ -538,7 +536,7 @@ i915_gem_gtt_pwrite_fast(struct drm_i915_gem_object *obj,
        struct i915_ggtt *ggtt = to_gt(i915)->ggtt;
        struct intel_runtime_pm *rpm = &i915->runtime_pm;
        intel_wakeref_t wakeref;
-       struct drm_mm_node node;
+       struct drm_mm_node node = {};
        struct i915_vma *vma;
        u64 remain, offset;
        void __user *user_data;
-- 
2.27.0