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Commit c44f5faa authored by Pablo Neira Ayuso's avatar Pablo Neira Ayuso
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netfilter: xt_HMARK: modulus is expensive for hash calculation 



Use:

((u64)(HASH_VAL * HASH_SIZE)) >> 32

as suggested by David S. Miller.

Signed-off-by: default avatarPablo Neira Ayuso <pablo@netfilter.org>
parent 58618115

net/netfilter/xt_HMARK.c

+1 −1
Original line number Diff line number Diff line
@@ -109,7 +109,7 @@ hmark_hash(struct hmark_tuple *t, const struct xt_hmark_info *info) 
	hash = jhash_3words(t->src, t->dst, t->uports.v32, info->hashrnd);

	hash = hash ^ (t->proto & info->proto_mask);



	return (hash % info->hmodulus) + info->hoffset;

	return (((u64)hash * info->hmodulus) >> 32) + info->hoffset;

}



static void