70 #define	altsblock (*asblk.b_un.b_fs)
96 static struct bufarea asblk;	/* alternate superblock */  variable
984 	if (asblk.b_dirty && !bflag) {  in setup()
986 		flush(fswritefd, &asblk);  in setup()
1158 	(void) getblk(&asblk, cgsblock(&sblock, sblock.fs_ncg - 1),  in checksb()
1160 	if (asblk.b_errs != 0) {  in checksb()
1161 		brelse(&asblk);  in checksb()
1260 	initbarea(&asblk);  in sblock_init()
1267 	if (asblk.b_un.b_buf == NULL)  in sblock_init()
1268 		asblk.b_un.b_buf = calloc(1, SBSIZE);  in sblock_init()
1269 	if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL)  in sblock_init()