Commit | Line | Data |
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44e36b42 DM |
1 | /* 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 | ||
15 | struct hlist_head *xfrm_hash_alloc(unsigned int sz) | |
16 | { | |
17 | struct hlist_head *n; | |
18 | ||
19 | if (sz <= PAGE_SIZE) | |
20 | n = kmalloc(sz, GFP_KERNEL); | |
21 | else if (hashdist) | |
22 | n = __vmalloc(sz, GFP_KERNEL, PAGE_KERNEL); | |
23 | else | |
24 | n = (struct hlist_head *) | |
25 | __get_free_pages(GFP_KERNEL, get_order(sz)); | |
26 | ||
27 | if (n) | |
28 | memset(n, 0, sz); | |
29 | ||
30 | return n; | |
31 | } | |
32 | ||
33 | void xfrm_hash_free(struct hlist_head *n, unsigned int sz) | |
34 | { | |
35 | if (sz <= PAGE_SIZE) | |
36 | kfree(n); | |
37 | else if (hashdist) | |
38 | vfree(n); | |
39 | else | |
40 | free_pages((unsigned long)n, get_order(sz)); | |
41 | } |