From: Russell King <rmk+lkml@arm.linux.org.uk>
To: Satyam Sharma <satyam.sharma@gmail.com>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: double exclamation (!!) suckage in the kernel
Date: Fri, 25 May 2007 21:28:54 +0100 [thread overview]
Message-ID: <20070525202854.GA24801@flint.arm.linux.org.uk> (raw)
In-Reply-To: <a781481a0705251323s6b5c8014t48e8d2ad63e8434a@mail.gmail.com>
On Sat, May 26, 2007 at 01:53:59AM +0530, Satyam Sharma wrote:
> Are all these occurrences merely the debris of
> s/something/!notsomething/g kind of patches or is there some
> dark, unknown C / gcc wizardry I have absolutely no clue of?
Try building and running this:
#include <stdio.h>
int main()
{
int i;
for (i = 0; i < 10; i++)
printf("%d: %d\n", i, !!i);
return 0;
}
and you should see it's effect.
--
Russell King
Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/
maintainer of:
next prev parent reply other threads:[~2007-05-25 20:29 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-25 20:23 double exclamation (!!) suckage in the kernel Satyam Sharma
2007-05-25 20:28 ` Russell King [this message]
2007-05-25 20:32 ` Satyam Sharma
2007-05-25 20:37 ` Björn Steinbrink
2007-05-25 20:41 ` Al Viro
2007-05-25 20:56 ` Satyam Sharma
2007-05-25 21:03 ` Satyam Sharma
2007-05-25 21:32 ` Al Viro
2007-05-25 21:36 ` Al Viro
2007-05-25 21:37 ` Satyam Sharma
2007-05-25 21:14 ` David Miller
2007-05-26 13:41 ` Jan Engelhardt
[not found] <8oOAk-4mP-3@gated-at.bofh.it>
[not found] ` <8oPmF-5Fb-21@gated-at.bofh.it>
[not found] ` <8p4OH-3N0-15@gated-at.bofh.it>
2007-05-26 16:38 ` Bodo Eggert
2007-05-26 16:50 ` Al Viro
2007-05-29 8:26 ` Bodo Eggert
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