1// SPDX-License-Identifier: GPL-2.0
2/* xfrm_hash.c: Common hash table code.
3 *
4 * Copyright (C) 2006 David S. Miller (davem@davemloft.net)
5 */
6
7#include <linux/kernel.h>
8#include <linux/mm.h>
9#include <linux/memblock.h>
10#include <linux/vmalloc.h>
11#include <linux/slab.h>
12#include <linux/xfrm.h>
13
14#include "xfrm_hash.h"
15
16struct hlist_head *xfrm_hash_alloc(unsigned int sz)
17{
18	struct hlist_head *n;
19
20	if (sz <= PAGE_SIZE)
21		n = kzalloc(sz, GFP_KERNEL);
22	else if (hashdist)
23		n = vzalloc(sz);
24	else
25		n = (struct hlist_head *)
26			__get_free_pages(GFP_KERNEL | __GFP_NOWARN | __GFP_ZERO,
27					 get_order(sz));
28
29	return n;
30}
31
32void xfrm_hash_free(struct hlist_head *n, unsigned int sz)
33{
34	if (sz <= PAGE_SIZE)
35		kfree(n);
36	else if (hashdist)
37		vfree(n);
38	else
39		free_pages((unsigned long)n, get_order(sz));
40}
41