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
16 struct 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
32 void 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
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