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From: "David S. Miller" <davem@redhat.com>
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Date: Thu, 5 Apr 2001 06:07:30 -0700 (PDT)
To: =?ISO-8859-1?Q?Sarda=F1ons@pizda.ninka.net,
        ?= Eliel <Eliel.Sardanons@philips.edu.ar>
Cc: "'linux-kernel@vger.kernel.org'" <linux-kernel@vger.kernel.org>
Subject: Re: asm/unistd.h
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Sarda?ons@pizda.ninka.net, Eliel writes:
 > I'm taking a look at the linux code and I don't understand how do you
 > programm...mmm (?) may be i'm a stupid why in include/asm/unistd.h in some
 > macros you use this:

Two reasons:

1) Empty statements give a warning from the compiler so
   this is why you see "#define FOO do { } while(0)"
2) It gives you a basic block in which to declare local
   variables.

Later,
David S. Miller
davem@redhat.com
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