linux-kernel - Re: [PATCH] include/linux/skbuff.h: using '0xffff' instead of '~0U'

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Date:	Sat, 1 Jun 2013 00:05:07 +0300
From:	Andy Shevchenko <andy.shevchenko@...il.com>
To:	Chen Gang <gang.chen@...anux.com>
Cc:	edumazet@...gle.com, Pravin Shelar <pshelar@...ira.com>,
	mgorman@...e.de, David Miller <davem@...emloft.net>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH] include/linux/skbuff.h: using '0xffff' instead of '~0U'

On Thu, May 30, 2013 at 9:03 AM, Chen Gang <gang.chen@...anux.com> wrote:
>
> Both 'transport_header' and 'mac_header' are u16, which are never equal
> to '~0U'.
>
> So need use '0xffff' instead of '~0U'.

Why not "(u16)~0" ?
Or even better "!= USHORT_MAX"?

Or mac_header + 1 == 0, though it less clear.

--
With Best Regards,
Andy Shevchenko
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