netdev - Re: netlink: avoid memset of 0 bytes sparse warning

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Message-Id: <20081120.040923.228828982.davem@davemloft.net>
Date:	Thu, 20 Nov 2008 04:09:23 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	kaber@...sh.net
Cc:	netdev@...r.kernel.org
Subject: Re: netlink: avoid memset of 0 bytes sparse warning

From: Patrick McHardy <kaber@...sh.net>
Date: Wed, 19 Nov 2008 14:56:12 +0100

>     netlink: avoid memset of 0 bytes sparse warning
>     
>     A netlink attribute padding of zero triggers this sparse warning:
>     
>     include/linux/netlink.h:245:8: warning: memset with byte count of 0
>     
>     Avoid the memset when the size parameter is constant and requires no padding.
>     
>     Signed-off-by: Patrick McHardy <kaber@...sh.net>

Applied to net-next-2.6, but I totally disagree with this sparse warning.

GCC even elides the memset entirely if it can determine the length
is constant and 0.

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