static void __init setup_zero_pages(void)
{
- struct cpuid cpu_id;
unsigned int order;
struct page *page;
int i;
- get_cpu_id(&cpu_id);
- switch (cpu_id.machine) {
- case 0x9672: /* g5 */
- case 0x2064: /* z900 */
- case 0x2066: /* z900 */
- case 0x2084: /* z990 */
- case 0x2086: /* z990 */
- case 0x2094: /* z9-109 */
- case 0x2096: /* z9-109 */
- order = 0;
- break;
- case 0x2097: /* z10 */
- case 0x2098: /* z10 */
- case 0x2817: /* z196 */
- case 0x2818: /* z196 */
- order = 2;
- break;
- case 0x2827: /* zEC12 */
- case 0x2828: /* zEC12 */
- order = 5;
- break;
- case 0x2964: /* z13 */
- default:
- order = 7;
- break;
- }
+ /* Latest machines require a mapping granularity of 512KB */
+ order = 7;
+
/* Limit number of empty zero pages for small memory sizes */
while (order > 2 && (totalram_pages >> 10) < (1UL << order))
order--;