linux-kernel - Re: [PATCH net-2.6.25 1/8] Create ipv4_is_<type>(_

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Date:	Mon, 17 Dec 2007 14:42:41 -0800
From:	Joe Perches <joe@...ches.com>
To:	Jan Engelhardt <jengelh@...putergmbh.de>
Cc:	netdev@...r.kernel.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	David Miller <davem@...emloft.net>
Subject: Re: [PATCH net-2.6.25 1/8] Create ipv4_is_<type>(__be32 addr)
	functions

On Mon, 2007-12-17 at 23:37 +0100, Jan Engelhardt wrote:
> >+static inline bool ipv4_is_loopback(__be32 addr)
> >+{
> >+	return (addr & htonl(0xff000000)) == htonl(0x7f000000);
> >+}
> >+
> Can we use __constant_htonl()?

I believe the generated code is the same.

> >+static inline bool ipv4_is_private_10(__be32 addr)
> >+{
> >+	return (addr & htonl(0xff000000)) == htonl(0x0a000000);
> >+}
> 
> What are these functions needed for, even? There does not seem to be
> any code (at least in davem's net-2.6.25:net/ipv4/, where I dared to grep)
> that uses them.

include/net/addrconf.h
net/sctp/protocol.c

cheers, Joe

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