// SPDX-License-Identifier: GPL-2.0
/*
 *	linux/mm/madvise.c
 *
 * Copyright (C) 1999  Linus Torvalds
 * Copyright (C) 2002  Christoph Hellwig
 */

/* Upstream Linux v6.0: mm/madvise.c:50-67
 * Exact source lines; kernel context, not a standalone program or book restoration.
 */
static int madvise_need_mmap_write(int behavior)
{
	switch (behavior) {
	case MADV_REMOVE:
	case MADV_WILLNEED:
	case MADV_DONTNEED:
	case MADV_DONTNEED_LOCKED:
	case MADV_COLD:
	case MADV_PAGEOUT:
	case MADV_FREE:
	case MADV_POPULATE_READ:
	case MADV_POPULATE_WRITE:
		return 0;
	default:
		/* be safe, default to 1. list exceptions explicitly */
		return 1;
	}
}