GUEST_HEAP_USABLE_SIZE   49 drivers/gpu/drm/vboxvideo/vbox_drv.h #define HOST_FLAGS_OFFSET GUEST_HEAP_USABLE_SIZE
GUEST_HEAP_USABLE_SIZE  224 drivers/gpu/drm/vboxvideo/vbox_main.c 				GUEST_HEAP_USABLE_SIZE, -1);