I915_GTT_MAX_PAGE_SIZE
for_each_set_bit(i, &supported, ilog2(I915_GTT_MAX_PAGE_SIZE) + 1) {
for_each_set_bit(bit, &supported, ilog2(I915_GTT_MAX_PAGE_SIZE) + 1) {
ilog2(I915_GTT_MAX_PAGE_SIZE) + 1) {