blk_max_pfn 23 block/blk-settings.c unsigned long blk_max_pfn; blk_max_pfn 880 block/blk-settings.c blk_max_pfn = max_pfn - 1; blk_max_pfn 376 block/bounce.c if (q->limits.bounce_pfn >= blk_max_pfn) blk_max_pfn 780 include/linux/blkdev.h extern unsigned long blk_max_low_pfn, blk_max_pfn;