netdev - Re: [Patch net-next v8 02/11] ipv6: make ip6_dst

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Date:	Fri, 24 May 2013 13:10:18 +0800
From:	Cong Wang <amwang@...hat.com>
To:	Mike Rapoport <mike.rapoport@...ellosystems.com>
Cc:	David Miller <davem@...emloft.net>, netdev@...r.kernel.org
Subject: Re: [Patch net-next v8 02/11] ipv6: make ip6_dst_hoplimit() static
 inline

On Wed, 2013-05-22 at 19:10 +0300, Mike Rapoport wrote:
> I've lost you here... Why not just:
> 
> static inline
> bool vxlan_addr_equal(const union vxlan_addr *a, const union vxlan_addr *b)
> {
>        if (a->sa.sa_family != b->sa.sa_family)
>                return false;
>        if (a->sa.sa_family == AF_INET6)
>                return ipv6_addr_equal(&a->sin6.sin6_addr, &b->sin6.sin6_addr);
>        else
>                return a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr;
> }

I see your point now, but for !CONFIG_IPV6, the first two 'if' is
obviously useless. Is GCC smart enough to know ->sa.sa_family ==
AF_INET4 is always true in such case? I doubt...


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