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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2012-09-18 10:04:02 +0100 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2012-09-20 14:23:11 +0200 |
| commit | 41783eea1a7f7d033ace4fd78218dd5f37b2db5f (patch) | |
| tree | 01814367fdd89ce0258901d13b108913253bb1aa | |
| parent | 3cce574f0190dd149472059fb69267cf83d290f9 (diff) | |
drm/i915: Assert that the exec object lookup table is a power-of-two
As we make the simplification of using a power-of-two size for the
execbuffer handle-to-object TLB, we should validate that this is actually
true and so clarify that premise.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem_execbuffer.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/i915_gem_execbuffer.c index 8186f63474f..6a2f3e50c71 100644 --- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c +++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c @@ -44,6 +44,7 @@ eb_create(int size) { struct eb_objects *eb; int count = PAGE_SIZE / sizeof(struct hlist_head) / 2; + BUILD_BUG_ON(!is_power_of_2(PAGE_SIZE / sizeof(struct hlist_head))); while (count > size) count >>= 1; eb = kzalloc(count*sizeof(struct hlist_head) + |