From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail202.messagelabs.com (mail202.messagelabs.com [216.82.254.227]) by kanga.kvack.org (Postfix) with ESMTP id 411DE5F0001 for ; Sat, 30 May 2009 18:29:17 -0400 (EDT) Date: Sat, 30 May 2009 15:29:39 -0700 (PDT) From: Linus Torvalds Subject: Re: [PATCH] Change ZERO_SIZE_PTR to point at unmapped space In-Reply-To: <20090530192829.GK6535@oblivion.subreption.com> Message-ID: References: <20090530192829.GK6535@oblivion.subreption.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org To: "Larry H." Cc: linux-mm@kvack.org, Alan Cox , Rik van Riel , linux-kernel@vger.kernel.org List-ID: On Sat, 30 May 2009, Larry H. wrote: > > The ZERO_OR_NULL_PTR macro is changed accordingly. This patch does > not modify its behavior nor has any performance nor functionality > impact. I'm sure it makes a code generation difference, with (a) big constants and (b) no longer possible to merge the conditional into one single one. Linus -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org