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Date: Sun, 30 Oct 2011 10:59:18 +0100
From: Andi Kleen <andi@firstfloor.org>
To: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
        Ben Hutchings <bhutchings@solarflare.com>,
        Andi Kleen <andi@firstfloor.org>,
        linux-kernel <linux-kernel@vger.kernel.org>,
        netdev <netdev@vger.kernel.org>,
        Andrew Morton <akpm@linux-foundation.org>
Subject: Re: >Re: [RFC] should VM_BUG_ON(cond) really evaluate cond
Message-ID: <20111030095918.GA19676@one.firstfloor.org>
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> +#define ACCESS_AT_MOST_ONCE(x)			\
> +	({	unsigned long __y;		\

why not typeof here?

> +		asm("":"=r" (__y):"0" (x));	\
> +		(__force __typeof__(x)) __y;	\
> +	})
> +

-Andi