blob: a2023ec52329ef66b95e14dc94f7086e5683e534 [file] [log] [blame]
David S. Miller44e36b42006-08-24 04:50:50 -07001/* xfrm_hash.c: Common hash table code.
2 *
3 * Copyright (C) 2006 David S. Miller (davem@davemloft.net)
4 */
5
6#include <linux/kernel.h>
7#include <linux/mm.h>
8#include <linux/bootmem.h>
9#include <linux/vmalloc.h>
10#include <linux/slab.h>
11#include <linux/xfrm.h>
12
13#include "xfrm_hash.h"
14
15struct hlist_head *xfrm_hash_alloc(unsigned int sz)
16{
17 struct hlist_head *n;
18
19 if (sz <= PAGE_SIZE)
Joonwoo Parkdcaee952007-11-26 23:23:21 +080020 n = kzalloc(sz, GFP_KERNEL);
David S. Miller44e36b42006-08-24 04:50:50 -070021 else if (hashdist)
Joonwoo Parkdcaee952007-11-26 23:23:21 +080022 n = __vmalloc(sz, GFP_KERNEL | __GFP_ZERO, PAGE_KERNEL);
David S. Miller44e36b42006-08-24 04:50:50 -070023 else
24 n = (struct hlist_head *)
Joonwoo Parkdcaee952007-11-26 23:23:21 +080025 __get_free_pages(GFP_KERNEL | __GFP_NOWARN | __GFP_ZERO,
Herbert Xu6253db02007-05-14 02:19:11 -070026 get_order(sz));
David S. Miller44e36b42006-08-24 04:50:50 -070027
David S. Miller44e36b42006-08-24 04:50:50 -070028 return n;
29}
30
31void xfrm_hash_free(struct hlist_head *n, unsigned int sz)
32{
33 if (sz <= PAGE_SIZE)
34 kfree(n);
35 else if (hashdist)
36 vfree(n);
37 else
38 free_pages((unsigned long)n, get_order(sz));
39}