for_each_set_bit
for_each_set_bit(i, &supported, ilog2(I915_GTT_MAX_PAGE_SIZE) + 1) {
for_each_set_bit(i, ppat->used, ppat->max_entries) {
for_each_set_bit(i, ppat->dirty, ppat->max_entries) {
for_each_set_bit(bit, &intr_dw, 32) {
for_each_set_bit(bit, bitmap, nbits)