frag_adjust
frag_adjust(d%sblock.fs_fpg, -1);
frag_adjust(d%sblock.fs_fpg, 1);
frag_adjust(d%sblock.fs_fpg, +1);
frag_adjust(odupper, -1);
frag_adjust(odupper, 1);
static void frag_adjust(daddr_t, int);
frag_adjust(dupper-1, -1);
frag_adjust(dupper-1, 1);
frag_adjust(bp[i].new*sblock.fs_frag,1);
frag_adjust(bp[i].new*sblock.fs_frag, 1);
frag_adjust(bp[i].old*sblock.fs_frag, -1);
frag_adjust(bp[i].old*sblock.fs_frag, 1);