si_bsize_phys
cdp->cdev->si_bsize_phys = cdp->block_size;
dev->si_bsize_phys = vn->sc_secsize;
dev->si_bsize_phys = 512;
disk->d_cdev->si_bsize_phys = disk->d_rawdev->si_bsize_phys;
dev->si_bsize_phys = info->d_media_blksize;
if (sb->st_blksize < dev->si_bsize_phys)
sb->st_blksize = dev->si_bsize_phys;
if (!dev->si_bsize_phys)
dev->si_bsize_phys = DEV_BSIZE;
chunksize = vp->v_rdev->si_bsize_phys;
blksiz = vp->v_rdev->si_bsize_phys;
dev->si_bsize_phys = DEV_BSIZE;
int secmask = vp->v_rdev->si_bsize_phys - 1;