BLK_BOUNCE_HIGH   152 block/blk-settings.c 	blk_queue_bounce_limit(q, BLK_BOUNCE_HIGH);
BLK_BOUNCE_HIGH   177 block/blk-settings.c 	if (b_pfn < (min_t(u64, 0x100000000UL, BLK_BOUNCE_HIGH) >> PAGE_SHIFT))