789 ar_fow(off_t sksz, off_t *skipped)  in ar_fow()  argument
795 	if (sksz <= 0)  in ar_fow()
823 		if ((mpos = cpos + sksz) > arsb.st_size) {  in ar_fow()
827 			*skipped = sksz;  in ar_fow()
848 ar_rev(off_t sksz)  in ar_rev()  argument
862 		if (sksz <= 0)  in ar_rev()
874 		if (sksz <= 0)  in ar_rev()
898 		if ((cpos -= sksz) < (off_t)0L) {  in ar_rev()
938 		if (sksz <= 0)  in ar_rev()
944 		if (sksz % phyblk) {  in ar_rev()
955 		mb.mt_count = sksz/phyblk;  in ar_rev()