From mboxrd@z Thu Jan  1 00:00:00 1970
From: Christoph Hellwig <hch@infradead.org>
Date: Mon, 19 Aug 2013 07:37:52 -0700
Subject: [Cluster-devel] [Patch net-next v3 7/9] fs: use generic union
 inet_addr and helper functions
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	<1376907278-26377-8-git-send-email-amwang@redhat.com>
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> @@ -1900,17 +1901,9 @@ srcip_matches(struct sockaddr *srcaddr, struct sockaddr *rhs)
>  {

I think your new sockaddr_equal should be equivalent to to this
srcip_matches, that is it should warn about and return false for unknown
address families.