From: "H. Peter Anvin" <hpa@zytor.com>
To: Jakub Jelinek <jakub@redhat.com>
Cc: Al Viro <viro@ftp.linux.org.uk>,
Jan Engelhardt <jengelh@linux01.gwdg.de>,
torvalds@osdl.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] use %p for pointers
Date: Wed, 11 Oct 2006 13:39:06 -0700 [thread overview]
Message-ID: <452D566A.50705@zytor.com> (raw)
In-Reply-To: <20061011202814.GD20982@devserv.devel.redhat.com>
Jakub Jelinek wrote:
> On Wed, Oct 11, 2006 at 11:45:10AM -0700, H. Peter Anvin wrote:
>> Al Viro wrote:
>>> %p will do no such thing in the kernel. As for the difference... %x
>>> might happen to work on some architectures (where sizeof(void
>>> *)==sizeof(int)),
>>> but it's not portable _and_ not right. %p is proper C for that...
>> It's really too bad gcc bitches about %#p, because that's arguably The
>> Right Thing.
>
> It is correct that gcc warns about %#p, that invokes undefined behavior
> in ISO C99.
>
Yes, it's a bug in the standard.
-hpa
next prev parent reply other threads:[~2006-10-11 20:39 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-10-10 21:49 [PATCH] use %p for pointers Al Viro
2006-10-10 21:58 ` David Miller
2006-10-11 11:16 ` Jan Engelhardt
2006-10-11 14:54 ` Al Viro
2006-10-11 18:45 ` H. Peter Anvin
2006-10-11 19:13 ` Jan Engelhardt
2006-10-11 19:16 ` H. Peter Anvin
2006-10-11 19:28 ` Jan Engelhardt
2006-10-11 20:28 ` Jakub Jelinek
2006-10-11 20:39 ` H. Peter Anvin [this message]
2006-10-12 11:03 ` Nikita Danilov
2006-10-12 11:49 ` Andreas Schwab
2006-10-12 12:02 ` Nikita Danilov
2006-10-12 12:33 ` Jan Engelhardt
2006-10-15 15:39 ` Jan Engelhardt
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