netdev - Re: [PATCH]: Preliminary release of Sun Neptune driver

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Message-Id: <20070919.161717.57157258.davem@davemloft.net>
Date:	Wed, 19 Sep 2007 16:17:17 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	shemminger@...ux-foundation.org
Cc:	netdev@...r.kernel.org, Ariel.Hendel@....com, greg.onufer@....com,
	jeff@...zik.org
Subject: Re: [PATCH]: Preliminary release of Sun Neptune driver

From: Stephen Hemminger <shemminger@...ux-foundation.org>
Date: Wed, 19 Sep 2007 16:05:20 -0700

> GCC is not as smart as you think... Try the following test:

Indeed, thanks for pointing that out.  I'll have to
macroize it like this to get the check:

static int __niu_wait_bits_clear_mac(void *np, unsigned long reg,
				     int limit, int delay)
{
 ...

#define niu_wait_bits_clear_mac(NP, REG, LIM, DELAY) \
({	BUILD_BUG_ON(LIM <= 0 || DELAY < 0); \
	__niu_wait_bits_clear_mac(NP, REG, LIM, DELAY); \
})
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