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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 = kzalloc(sz, GFP_KERNEL); |
21 | else if (hashdist) |
22 | n = __vmalloc(sz, GFP_KERNEL | __GFP_ZERO, PAGE_KERNEL); |
23 | else |
24 | n = (struct hlist_head *) |
25 | __get_free_pages(GFP_KERNEL | __GFP_NOWARN | __GFP_ZERO, |
26 | get_order(sz)); |
27 | |
28 | return n; |
29 | } |
30 | |
31 | void 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 | } |
40 |
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