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

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Date:	Mon, 17 Dec 2007 23:37:24 +0100 (CET)
From:	Jan Engelhardt <jengelh@...putergmbh.de>
To:	Joe Perches <joe@...ches.com>
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 Dec 13 2007 15:38, Joe Perches wrote:
>
>Change IPV4 specific macros LOOPBACK MULTICAST LOCAL_MCAST BADCLASS and ZERONET
>macros to inline functions ipv4_is_<type>(__be32 addr)
>
>Adds type safety and arguably some readability.
>
>Changes since last submission:
>
>Removed ipv4_addr_octets function
>Used hex constants
>Converted recently added rfc3330 macros
>
>Signed-off-by: Joe Perches <joe@...ches.com>
>---
>+static inline bool ipv4_is_loopback(__be32 addr)
>+{
>+	return (addr & htonl(0xff000000)) == htonl(0x7f000000);
>+}
>+

Can we use __constant_htonl()?

>+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.
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