netdev - Re: [RESEND PATCH net-next-2.6 3/3] ipv6 sit: Set relay to 0.0.0.0 directly if relay

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Message-Id: <20091012.020806.98275364.davem@davemloft.net>
Date:	Mon, 12 Oct 2009 02:08:06 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	yoshfuji@...ux-ipv6.org
Cc:	eric.dumazet@...il.com, netdev@...r.kernel.org
Subject: Re: [RESEND PATCH net-next-2.6 3/3] ipv6 sit: Set relay to 0.0.0.0
 directly if relay_prefixlen == 0.

From: YOSHIFUJI Hideaki <yoshfuji@...ux-ipv6.org>
Date: Mon, 12 Oct 2009 17:50:54 +0900

> Unfortunately, on x86 architecture (80286 and later at least),
> lower 5 bits (& 0x1f) are used for shift operation.
> Thus, 0xffffffffUL << 32 gives 0xffffffffUL.

Indeed, thanks for the explanation, I thought only right
shift mattered for this case of "shift count larger than
type".
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