// 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:283-296.
 * Complete function definition; surrounding kernel context is required.
 * Source: https://github.com/torvalds/linux/blob/v6.0/mm/swap.c#L283
 * License text: GPL-2.0.txt (in this directory).
 */
void folio_rotate_reclaimable(struct folio *folio)
{
	if (!folio_test_locked(folio) && !folio_test_dirty(folio) &&
	    !folio_test_unevictable(folio) && folio_test_lru(folio)) {
		struct folio_batch *fbatch;
		unsigned long flags;

		folio_get(folio);
		local_lock_irqsave(&lru_rotate.lock, flags);
		fbatch = this_cpu_ptr(&lru_rotate.fbatch);
		folio_batch_add_and_move(fbatch, folio, lru_move_tail_fn);
		local_unlock_irqrestore(&lru_rotate.lock, flags);
	}
}