1 /* General purpose hashing library
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.
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)
13 #include <linux/version.h>
14 #if LINUX_VERSION_CODE < KERNEL_VERSION(3,14,0)
16 #include <linux/cache.h>
17 #include <linux/compiler.h>
18 #include <linux/jhash.h>
19 #include <linux/hash.h>
20 #include <linux/kernel.h>
22 static struct fast_hash_ops arch_hash_ops __read_mostly = {
27 static bool arch_inited __read_mostly;
28 static void init_arch(void)
30 if (likely(arch_inited))
33 setup_arch_fast_hash(&arch_hash_ops);
37 u32 arch_fast_hash(const void *data, u32 len, u32 seed)
41 return arch_hash_ops.hash(data, len, seed);
44 u32 arch_fast_hash2(const u32 *data, u32 len, u32 seed)
48 return arch_hash_ops.hash2(data, len, seed);