netdev - Re: [PATCH] can: provide library functions for skb allocation

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Date:	Sun, 18 Oct 2009 20:46:17 +0200
From:	Wolfgang Grandegger <wg@...ndegger.com>
To:	David Miller <davem@...emloft.net>
CC:	netdev@...r.kernel.org, socketcan-core@...ts.berlios.de,
	haas@...-wuensche.com, anantgole@...com, mkl@...gutronix.de
Subject: Re: [PATCH] can: provide library functions for skb allocation

David Miller wrote:
> From: Wolfgang Grandegger <wg@...ndegger.com>
> Date: Thu, 15 Oct 2009 11:22:18 +0200
> 
>> +	skb->protocol = __constant_htons(ETH_P_CAN);
> 
> Please don't use __constant_htonX() for runtime invocatios.
> It's only for situation which must be compile time evaluations
> such as case statements and static initializations.
> 
> GCC can figure out that's it's constant if you just use
> plan htonX().

OK, I just dent out v2 of this patch.

Wolfgang.
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