taglinefilesource code
breada41fs/block_dev.cbh = breada(dev,block,block+1,block+2,-1);
breada342include/linux/fs.hextern struct buffer_head * breada(dev_t dev,int block,...);
breada100kernel/blk_drv/ramdisk.cbh = breada(ROOT_DEV,block+1,block,block+2,-1);
breada121kernel/blk_drv/ramdisk.cbh = breada(ROOT_DEV, block, block+1, block+2, -1);