x86/mm/highmem_32.c

0001 // SPDX-License-Identifier: GPL-2.0-only
0002 #include <linux/highmem.h>
0003 #include <linux/export.h>
0004 #include <linux/swap.h> /* for totalram_pages */
0005 #include <linux/memblock.h>
0006
0007 void __init set_highmem_pages_init(void)
0008 {
0009     struct zone *zone;
0010     int nid;
0011
0012     /*
0013      * Explicitly reset zone->managed_pages because set_highmem_pages_init()
0014      * is invoked before memblock_free_all()
0015      */
0016     reset_all_zones_managed_pages();
0017     for_each_zone(zone) {
0018         unsigned long zone_start_pfn, zone_end_pfn;
0019
0020         if (!is_highmem(zone))
0021             continue;
0022
0023         zone_start_pfn = zone->zone_start_pfn;
0024         zone_end_pfn = zone_start_pfn + zone->spanned_pages;
0025
0026         nid = zone_to_nid(zone);
0027         printk(KERN_INFO "Initializing %s for node %d (%08lx:%08lx)\n",
0028                 zone->name, nid, zone_start_pfn, zone_end_pfn);
0029
0030         add_highpages_with_active_regions(nid, zone_start_pfn,
0031                  zone_end_pfn);
0032     }
0033 }