From: "David S. Miller" <davem@redhat.com>
To: Willy Tarreau <willy@w.ods.org>
Cc: jamie@shareable.org, albert@users.sourceforge.net,
linux-kernel@vger.kernel.org, chip@pobox.com
Subject: Re: [PATCH] 2.4.22pre10: {,un}likely_p() macros for pointers
Date: Sat, 9 Aug 2003 01:51:42 -0700 [thread overview]
Message-ID: <20030809015142.56190015.davem@redhat.com> (raw)
In-Reply-To: <20030809081346.GC29616@alpha.home.local>
On Sat, 9 Aug 2003 10:13:46 +0200
Willy Tarreau <willy@w.ods.org> wrote:
> (how could !!x be 0 if x isn't ?)
I believe the C language allows for systems where the NULL pointer is
not zero.
I can't think of any reason why the NULL macro exists otherwise.
However, even if I'm right, I dread the guy who has to make other
people's code work on such a platform. Using normal boolean tests for
NULL pointer checks is just too common.
next prev parent reply other threads:[~2003-08-09 8:52 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-08-05 12:44 [PATCH] 2.4.22pre10: {,un}likely_p() macros for pointers Albert Cahalan
2003-08-09 0:21 ` Jamie Lokier
2003-08-09 8:13 ` Willy Tarreau
2003-08-09 8:51 ` David S. Miller [this message]
2003-08-09 9:36 ` Jamie Lokier
2003-08-09 10:10 ` Herbert Xu
2003-08-09 10:42 ` Alan Cox
2003-08-09 16:23 ` Jamie Lokier
2003-08-09 17:30 ` NULL. Again. (was Re: [PATCH] 2.4.22pre10: {,un}likely_p()) Chip Salzenberg
2003-08-09 17:43 ` Sean Neakums
2003-08-11 1:04 ` Jamie Lokier
2003-08-11 23:06 ` Timothy Miller
2003-08-09 19:44 ` Jamie Lokier
-- strict thread matches above, loose matches on Subject: below --
2003-08-10 4:03 [PATCH] 2.4.22pre10: {,un}likely_p() macros for pointers Albert Cahalan
2003-08-10 7:29 ` Willy Tarreau
2003-08-10 8:02 ` Willy Tarreau
2003-08-11 1:23 ` Chip Salzenberg
2003-08-11 2:09 ` Jamie Lokier
2003-08-11 2:39 ` Chip Salzenberg
2003-08-11 4:02 ` Albert Cahalan
2003-08-11 4:30 ` Jamie Lokier
2003-08-11 5:30 ` Willy Tarreau
2003-08-11 5:42 ` Jamie Lokier
2003-08-11 13:09 ` Albert Cahalan
2003-08-11 18:55 ` Andrew Morton
2003-08-11 23:13 ` Albert Cahalan
2003-08-13 19:42 ` Jamie Lokier
2003-08-11 4:55 ` Jamie Lokier
2003-08-11 5:26 ` Willy Tarreau
2003-08-11 5:38 ` Jamie Lokier
2003-08-04 17:06 Chip Salzenberg
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