[Intel-gfx] [PATCH v2 02/40] drm/i915: Simplify i915_gtt_color_adjust()

[Chris Wilson]

If we remember that node_list is a circular list containing the fake
head_node, we can use a simple list_next_entry() and skip the NULL check
for the allocated check against the head_node.

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

diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index 4543d7fa7fc2..4d82f38a000b 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -2707,10 +2707,8 @@ static void i915_gtt_color_adjust(struct drm_mm_node *node,
 	if (node->color != color)
 		*start += 4096;
 
-	node = list_first_entry_or_null(&node->node_list,
-					struct drm_mm_node,
-					node_list);
-	if (node && node->allocated && node->color != color)
+	node = list_next_entry(node, node_list);
+	if (node->allocated && node->color != color)
 		*end -= 4096;
 }
 
-- 
2.11.0