Merge branch 'for-davem' of git://git.kernel.org/pub/scm/linux/kernel/git/bwh/sfc...
[cascardo/linux.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
16 static struct fast_hash_ops arch_hash_ops __read_mostly = {
17         .hash  = jhash,
18         .hash2 = jhash2,
19 };
20
21 u32 arch_fast_hash(const void *data, u32 len, u32 seed)
22 {
23         return arch_hash_ops.hash(data, len, seed);
24 }
25 EXPORT_SYMBOL_GPL(arch_fast_hash);
26
27 u32 arch_fast_hash2(const u32 *data, u32 len, u32 seed)
28 {
29         return arch_hash_ops.hash2(data, len, seed);
30 }
31 EXPORT_SYMBOL_GPL(arch_fast_hash2);
32
33 static int __init hashlib_init(void)
34 {
35         setup_arch_fast_hash(&arch_hash_ops);
36         return 0;
37 }
38 early_initcall(hashlib_init);