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Date: Wed, 17 Apr 2013 17:32:03 -0700 (PDT)
From: David Rientjes <rientjes@google.com>
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To: Will Huck <will.huckk@gmail.com>
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        linux-mm@kvack.org, Christoph Lameter <cl@linux.com>,
        Behan Webster <behanw@converseincode.com>,
        Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [PATCH] slab: Remove unnecessary __builtin_constant_p()
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On Thu, 18 Apr 2013, Will Huck wrote:

> In normal case, builtin_constant_p() is used for what?
> 

http://gcc.gnu.org/onlinedocs/