highmem_32.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 #include <linux/highmem.h>
   3 #include <linux/export.h>
   4 #include <linux/swap.h> /* for totalram_pages */
   5 #include <linux/memblock.h>
   6 #include <asm/numa.h>
   7
   8 void __init set_highmem_pages_init(void)
   9 {
  10         struct zone *zone;
  11         int nid;
  12
  13         /*
  14          * Explicitly reset zone->managed_pages because set_highmem_pages_init()
  15          * is invoked before memblock_free_all()
  16          */
  17         reset_all_zones_managed_pages();
  18         for_each_zone(zone) {
  19                 unsigned long zone_start_pfn, zone_end_pfn;
  20
  21                 if (!is_highmem(zone))
  22                         continue;
  23
  24                 zone_start_pfn = zone->zone_start_pfn;
  25                 zone_end_pfn = zone_start_pfn + zone->spanned_pages;
  26
  27                 nid = zone_to_nid(zone);
  28                 printk(KERN_INFO "Initializing %s for node %d (%08lx:%08lx)\n",
  29                                 zone->name, nid, zone_start_pfn, zone_end_pfn);
  30
  31                 add_highpages_with_active_regions(nid, zone_start_pfn,
  32                                  zone_end_pfn);
  33         }
  34 }