GPU_BUDDY_HEADER_STATE
block->header &= ~GPU_BUDDY_HEADER_STATE;
block->header &= ~GPU_BUDDY_HEADER_STATE;
block->header &= ~GPU_BUDDY_HEADER_STATE;
return block->header & GPU_BUDDY_HEADER_STATE;
return (block->header & GPU_BUDDY_HEADER_STATE) == GPU_BUDDY_FREE;