RADEON_MAX_DOORBELLS  725 drivers/gpu/drm/radeon/radeon.h 	DECLARE_BITMAP(used, RADEON_MAX_DOORBELLS);
RADEON_MAX_DOORBELLS  343 drivers/gpu/drm/radeon/radeon_device.c 	rdev->doorbell.num_doorbells = min_t(u32, rdev->doorbell.size / sizeof(u32), RADEON_MAX_DOORBELLS);