MAP_SZ 63 drivers/block/null_blk_main.c DECLARE_BITMAP(bitmap, MAP_SZ); MAP_SZ 65 drivers/block/null_blk_main.c #define NULLB_PAGE_LOCK (MAP_SZ - 1) MAP_SZ 66 drivers/block/null_blk_main.c #define NULLB_PAGE_FREE (MAP_SZ - 2) MAP_SZ 684 drivers/block/null_blk_main.c int size = MAP_SZ - 2;