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 
set_highmem_pages_init(void)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 }
35