// SPDX-License-Identifier: GPL-2.0
/*
 *  Copyright (C) 1991, 1992, 1993, 1994  Linus Torvalds
 *
 *  Swap reorganised 29.12.95, Stephen Tweedie.
 *  kswapd added: 7.1.96  sct
 *  Removed kswapd_ctl limits, and swap out as many pages as needed
 *  to bring the system back to freepages.high: 2.4.97, Rik van Riel.
 *  Zone aware kswapd started 02/00, Kanoj Sarcar (kanoj@sgi.com).
 *  Multiqueue VM started 5.8.00, Rik van Riel.
 */

/* Extracted unchanged from Linux v6.12, mm/vmscan.c:6214-6227.
 * Full function definition; surrounding kernel context is required.
 * Source: https://github.com/torvalds/linux/blob/v6.12/mm/vmscan.c#L6214
 * License text: GPL-2.0.txt (in this directory).
 */
static void snapshot_refaults(struct mem_cgroup *target_memcg, pg_data_t *pgdat)
{
	struct lruvec *target_lruvec;
	unsigned long refaults;

	if (lru_gen_enabled())
		return;

	target_lruvec = mem_cgroup_lruvec(target_memcg, pgdat);
	refaults = lruvec_page_state(target_lruvec, WORKINGSET_ACTIVATE_ANON);
	target_lruvec->refaults[WORKINGSET_ANON] = refaults;
	refaults = lruvec_page_state(target_lruvec, WORKINGSET_ACTIVATE_FILE);
	target_lruvec->refaults[WORKINGSET_FILE] = refaults;
}