// SPDX-License-Identifier: GPL-2.0-only
/*
 *  linux/mm/page_alloc.c
 *
 *  Manages the free list, the system allocates free pages here.
 *  Note that kmalloc() lives in slab.c
 *
 *  Copyright (C) 1991, 1992, 1993, 1994  Linus Torvalds
 *  Swap reorganised 29.12.95, Stephen Tweedie
 *  Support of BIGMEM added by Gerhard Wichert, Siemens AG, July 1999
 *  Reshaped it to be a zoned allocator, Ingo Molnar, Red Hat, 1999
 *  Discontiguous memory support, Kanoj Sarcar, SGI, Nov 1999
 *  Zone balancing, Kanoj Sarcar, SGI, Jan 2000
 *  Per cpu hot/cold page lists, bulk allocation, Martin J. Bligh, Sept 2002
 *          (lots of bits borrowed from Ingo Molnar & Andrew Morton)
 */

/* Extracted unchanged from Linux v6.12, mm/page_alloc.c:3973-3990.
 * Complete named function; surrounding kernel context is required.
 * Source: https://github.com/torvalds/linux/blob/v6.12/mm/page_alloc.c#L3973-L3990
 * License text: GPL-2.0.txt (in this directory).
 */
static void wake_all_kswapds(unsigned int order, gfp_t gfp_mask,
			     const struct alloc_context *ac)
{
	struct zoneref *z;
	struct zone *zone;
	pg_data_t *last_pgdat = NULL;
	enum zone_type highest_zoneidx = ac->highest_zoneidx;

	for_each_zone_zonelist_nodemask(zone, z, ac->zonelist, highest_zoneidx,
					ac->nodemask) {
		if (!managed_zone(zone))
			continue;
		if (last_pgdat != zone->zone_pgdat) {
			wakeup_kswapd(zone, gfp_mask, order, highest_zoneidx);
			last_pgdat = zone->zone_pgdat;
		}
	}
}