netdev - Re: dst->obsolete has become pointless

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Message-Id: <20111109.192427.661860445333469011.davem@davemloft.net>
Date:	Wed, 09 Nov 2011 19:24:27 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	joe@...ches.com
Cc:	steffen.klassert@...unet.com, netdev@...r.kernel.org,
	timo.teras@....fi
Subject: Re: dst->obsolete has become pointless

From: Joe Perches <joe@...ches.com>
Date: Wed, 09 Nov 2011 15:56:09 -0800

> As far as I know, other than being large enough to
> store a 1 and 0, it's implementation defined.
> 
> Just like an unsigned short.
> 
> I _believe_ gcc uses unsigned char width for
> _Bool in all normal cases though.

We can only use it in this scenerio if it universally
uses the same type.  This is due to the by-hand layout
of the rest of the structure such that __refcnt ends
up on a different cache line.
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