WRITEBACK_SHARE_SHIFT   48 drivers/md/bcache/writeback.c 		div64_u64(bdev_sectors(dc->bdev) << WRITEBACK_SHARE_SHIFT,
WRITEBACK_SHARE_SHIFT   58 drivers/md/bcache/writeback.c 	return (cache_dirty_target * bdev_share) >> WRITEBACK_SHARE_SHIFT;