// SPDX-License-Identifier: GPL-2.0-only
/*
 *  linux/mm/swap.c
 *
 *  Copyright (C) 1991, 1992, 1993, 1994  Linus Torvalds
 */

/*
 * This file contains the default values for the operation of the
 * Linux VM subsystem. Fine-tuning documentation can be found in
 * Documentation/admin-guide/sysctl/vm.rst.
 * Started 18.12.91
 * Swap aging added 23.2.95, Stephen Tweedie.
 * Buffermem limits added 12.3.98, Rik van Riel.
 */

/* Extracted unchanged from Linux v6.0, mm/swap.c:479-492.
 * Complete function definition; surrounding kernel context is required.
 * Source: https://github.com/torvalds/linux/blob/v6.0/mm/swap.c#L479
 * License text: GPL-2.0.txt (in this directory).
 */
void folio_add_lru(struct folio *folio)
{
	struct folio_batch *fbatch;

	VM_BUG_ON_FOLIO(folio_test_active(folio) &&
			folio_test_unevictable(folio), folio);
	VM_BUG_ON_FOLIO(folio_test_lru(folio), folio);

	folio_get(folio);
	local_lock(&cpu_fbatches.lock);
	fbatch = this_cpu_ptr(&cpu_fbatches.lru_add);
	folio_batch_add_and_move(fbatch, folio, lru_add_fn);
	local_unlock(&cpu_fbatches.lock);
}