Merge tag 'nfs-for-3.14-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs
[sfrench/cifs-2.6.git] / lib / hash.c
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
17 static struct fast_hash_ops arch_hash_ops __read_mostly = {
18         .hash  = jhash,
19         .hash2 = jhash2,
20 };
21
22 u32 arch_fast_hash(const void *data, u32 len, u32 seed)
23 {
24         return arch_hash_ops.hash(data, len, seed);
25 }
26 EXPORT_SYMBOL_GPL(arch_fast_hash);
27
28 u32 arch_fast_hash2(const u32 *data, u32 len, u32 seed)
29 {
30         return arch_hash_ops.hash2(data, len, seed);
31 }
32 EXPORT_SYMBOL_GPL(arch_fast_hash2);
33
34 static int __init hashlib_init(void)
35 {
36         setup_arch_fast_hash(&arch_hash_ops);
37         return 0;
38 }
39 early_initcall(hashlib_init);