Re: double exclamation (!!) suckage in the kernel

[Russell King <rmk+lkml@arm.linux.org.uk>]

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: