linux-kernel - Re: somebody dropped a (warning) bomb

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Message-ID:  <mj+md-20070209.225624.24301.nikam@ucw.cz>
Date:	Fri, 9 Feb 2007 23:58:01 +0100
From:	Martin Mares <mj@....cz>
To:	Jan Engelhardt <jengelh@...ux01.gwdg.de>
Cc:	"linux-os (Dick Johnson)" <linux-os@...logic.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	David Rientjes <rientjes@...gle.com>,
	Jeff Garzik <jeff@...zik.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: somebody dropped a (warning) bomb

Hello!

> void* comparisons are unsigned. Period.

As far as the C standard is concerned, there is no relationship between
comparison on pointers and comparison of their values casted to uintptr_t.
The address space needn't be linear and on some machines it isn't. So
speaking about signedness of pointer comparisons doesn't make sense,
except for concrete implementations.

				Have a nice fortnight
-- 
Martin `MJ' Mares                          <mj@....cz>   http://mj.ucw.cz/
Faculty of Math and Physics, Charles University, Prague, Czech Rep., Earth
Top ten reasons to procrastinate: 1.
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