Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1/* General purpose hashing library
2 *
3 * That's a start of a kernel hashing library, which can be extended
4 * with further algorithms in future. arch_fast_hash{2,}() will
5 * eventually resolve to an architecture optimized implementation.
6 *
7 * Copyright 2013 Francesco Fusco <ffusco@redhat.com>
8 * Copyright 2013 Daniel Borkmann <dborkman@redhat.com>
9 * Copyright 2013 Thomas Graf <tgraf@redhat.com>
10 * Licensed under the GNU General Public License, version 2.0 (GPLv2)
11 */
12
13#include <linux/jhash.h>
14#include <linux/hash.h>
15#include <linux/cache.h>
16
17static struct fast_hash_ops arch_hash_ops __read_mostly = {
18 .hash = jhash,
19 .hash2 = jhash2,
20};
21
22u32 arch_fast_hash(const void *data, u32 len, u32 seed)
23{
24 return arch_hash_ops.hash(data, len, seed);
25}
26EXPORT_SYMBOL_GPL(arch_fast_hash);
27
28u32 arch_fast_hash2(const u32 *data, u32 len, u32 seed)
29{
30 return arch_hash_ops.hash2(data, len, seed);
31}
32EXPORT_SYMBOL_GPL(arch_fast_hash2);
33
34static int __init hashlib_init(void)
35{
36 setup_arch_fast_hash(&arch_hash_ops);
37 return 0;
38}
39early_initcall(hashlib_init);