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 
set_highmem_pages_init(void)7 void __init set_highmem_pages_init(void)
8 {
9 	struct zone *zone;
10 	int nid;
11 
12 	/*
13 	 * Explicitly reset zone->managed_pages because set_highmem_pages_init()
14 	 * is invoked before memblock_free_all()
15 	 */
16 	reset_all_zones_managed_pages();
17 	for_each_zone(zone) {
18 		unsigned long zone_start_pfn, zone_end_pfn;
19 
20 		if (!is_highmem(zone))
21 			continue;
22 
23 		zone_start_pfn = zone->zone_start_pfn;
24 		zone_end_pfn = zone_start_pfn + zone->spanned_pages;
25 
26 		nid = zone_to_nid(zone);
27 		printk(KERN_INFO "Initializing %s for node %d (%08lx:%08lx)\n",
28 				zone->name, nid, zone_start_pfn, zone_end_pfn);
29 
30 		add_highpages_with_active_regions(nid, zone_start_pfn,
31 				 zone_end_pfn);
32 	}
33 }
34