int alpha_using_srm;
 #endif
 
-#define N(a) (sizeof(a)/sizeof(a[0]))
-
 static struct alpha_machine_vector *get_sysvec(unsigned long, unsigned long,
                                               unsigned long);
 static struct alpha_machine_vector *get_sysvec_byname(const char *);
        standard_io_resources[0].start = RTC_PORT(0);
        standard_io_resources[0].end = RTC_PORT(0) + 0x10;
 
-       for (i = 0; i < N(standard_io_resources); ++i)
+       for (i = 0; i < ARRAY_SIZE(standard_io_resources); ++i)
                request_resource(io, standard_io_resources+i);
 }
 
 
        /* Search the system tables first... */
        vec = NULL;
-       if (type < N(systype_vecs)) {
+       if (type < ARRAY_SIZE(systype_vecs)) {
                vec = systype_vecs[type];
        } else if ((type > ST_API_BIAS) &&
-                  (type - ST_API_BIAS) < N(api_vecs)) {
+                  (type - ST_API_BIAS) < ARRAY_SIZE(api_vecs)) {
                vec = api_vecs[type - ST_API_BIAS];
        } else if ((type > ST_UNOFFICIAL_BIAS) &&
-                  (type - ST_UNOFFICIAL_BIAS) < N(unofficial_vecs)) {
+                  (type - ST_UNOFFICIAL_BIAS) < ARRAY_SIZE(unofficial_vecs)) {
                vec = unofficial_vecs[type - ST_UNOFFICIAL_BIAS];
        }
 
 
                switch (type) {
                case ST_DEC_ALCOR:
-                       if (member < N(alcor_indices))
+                       if (member < ARRAY_SIZE(alcor_indices))
                                vec = alcor_vecs[alcor_indices[member]];
                        break;
                case ST_DEC_EB164:
-                       if (member < N(eb164_indices))
+                       if (member < ARRAY_SIZE(eb164_indices))
                                vec = eb164_vecs[eb164_indices[member]];
                        /* PC164 may show as EB164 variation with EV56 CPU,
                           but, since no true EB164 had anything but EV5... */
                                vec = &pc164_mv;
                        break;
                case ST_DEC_EB64P:
-                       if (member < N(eb64p_indices))
+                       if (member < ARRAY_SIZE(eb64p_indices))
                                vec = eb64p_vecs[eb64p_indices[member]];
                        break;
                case ST_DEC_EB66:
-                       if (member < N(eb66_indices))
+                       if (member < ARRAY_SIZE(eb66_indices))
                                vec = eb66_vecs[eb66_indices[member]];
                        break;
                case ST_DEC_MARVEL:
-                       if (member < N(marvel_indices))
+                       if (member < ARRAY_SIZE(marvel_indices))
                                vec = marvel_vecs[marvel_indices[member]];
                        break;
                case ST_DEC_TITAN:
                        vec = titan_vecs[0];    /* default */
-                       if (member < N(titan_indices))
+                       if (member < ARRAY_SIZE(titan_indices))
                                vec = titan_vecs[titan_indices[member]];
                        break;
                case ST_DEC_TSUNAMI:
-                       if (member < N(tsunami_indices))
+                       if (member < ARRAY_SIZE(tsunami_indices))
                                vec = tsunami_vecs[tsunami_indices[member]];
                        break;
                case ST_DEC_1000:
 
        size_t i;
 
-       for (i = 0; i < N(all_vecs); ++i) {
+       for (i = 0; i < ARRAY_SIZE(all_vecs); ++i) {
                struct alpha_machine_vector *mv = all_vecs[i];
                if (strcasecmp(mv->vector_name, name) == 0)
                        return mv;
 
        /* If not in the tables, make it UNKNOWN,
           else set type name to family */
-       if (type < N(systype_names)) {
+       if (type < ARRAY_SIZE(systype_names)) {
                *type_name = systype_names[type];
        } else if ((type > ST_API_BIAS) &&
-                  (type - ST_API_BIAS) < N(api_names)) {
+                  (type - ST_API_BIAS) < ARRAY_SIZE(api_names)) {
                *type_name = api_names[type - ST_API_BIAS];
        } else if ((type > ST_UNOFFICIAL_BIAS) &&
-                  (type - ST_UNOFFICIAL_BIAS) < N(unofficial_names)) {
+                  (type - ST_UNOFFICIAL_BIAS) < ARRAY_SIZE(unofficial_names)) {
                *type_name = unofficial_names[type - ST_UNOFFICIAL_BIAS];
        } else {
                *type_name = sys_unknown;
        default: /* default to variation "0" for now */
                break;
        case ST_DEC_EB164:
-               if (member < N(eb164_indices))
+               if (member < ARRAY_SIZE(eb164_indices))
                        *variation_name = eb164_names[eb164_indices[member]];
                /* PC164 may show as EB164 variation, but with EV56 CPU,
                   so, since no true EB164 had anything but EV5... */
                        *variation_name = eb164_names[1]; /* make it PC164 */
                break;
        case ST_DEC_ALCOR:
-               if (member < N(alcor_indices))
+               if (member < ARRAY_SIZE(alcor_indices))
                        *variation_name = alcor_names[alcor_indices[member]];
                break;
        case ST_DEC_EB64P:
-               if (member < N(eb64p_indices))
+               if (member < ARRAY_SIZE(eb64p_indices))
                        *variation_name = eb64p_names[eb64p_indices[member]];
                break;
        case ST_DEC_EB66:
-               if (member < N(eb66_indices))
+               if (member < ARRAY_SIZE(eb66_indices))
                        *variation_name = eb66_names[eb66_indices[member]];
                break;
        case ST_DEC_MARVEL:
-               if (member < N(marvel_indices))
+               if (member < ARRAY_SIZE(marvel_indices))
                        *variation_name = marvel_names[marvel_indices[member]];
                break;
        case ST_DEC_RAWHIDE:
-               if (member < N(rawhide_indices))
+               if (member < ARRAY_SIZE(rawhide_indices))
                        *variation_name = rawhide_names[rawhide_indices[member]];
                break;
        case ST_DEC_TITAN:
                *variation_name = titan_names[0];       /* default */
-               if (member < N(titan_indices))
+               if (member < ARRAY_SIZE(titan_indices))
                        *variation_name = titan_names[titan_indices[member]];
                break;
        case ST_DEC_TSUNAMI:
-               if (member < N(tsunami_indices))
+               if (member < ARRAY_SIZE(tsunami_indices))
                        *variation_name = tsunami_names[tsunami_indices[member]];
                break;
        }
 
        cpu_index = (unsigned) (cpu->type - 1);
        cpu_name = "Unknown";
-       if (cpu_index < N(cpu_names))
+       if (cpu_index < ARRAY_SIZE(cpu_names))
                cpu_name = cpu_names[cpu_index];
 
        get_sysnames(hwrpb->sys_type, hwrpb->sys_variation,