linux-kernel - Re: [PATCH 2/9] drivers/acpi/asus

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Message-ID: <20080229061435.GE19198@parisc-linux.org>
Date:	Thu, 28 Feb 2008 23:14:35 -0700
From:	Matthew Wilcox <matthew@....cx>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Mark Pearson <devnull.port@...glemail.com>,
	Karol Kozimor <sziwan@...l.org.pl>,
	Julia Lawall <julia@...u.dk>, corentincj@...aif.net,
	sziwan@...rs.sourceforge.net, acpi4asus-user@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org,
	Len Brown <lenb@...nel.org>
Subject: Re: [PATCH 2/9] drivers/acpi/asus_acpi.c: Correct use of ! and &

On Thu, Feb 28, 2008 at 11:10:23PM -0700, Matthew Wilcox wrote:
> On Thu, Feb 28, 2008 at 09:55:03PM -0800, Andrew Morton wrote:
> >  	if (invert)		/* invert target value */
> > -		led_out = !led_out & 0x1;
> > +		led_out = !led_out;
> >  
> >  	if (!write_acpi_int(hotk->handle, ledname, led_out, NULL))
> 
> But now you're writing 0xffffffff instead of 1.  I think the suggestion
> of led_out ^= 1 was the correct one.

! is not ~
! is not ~
! is not ~
....

I'll go to sleep now.

-- 
Intel are signing my paycheques ... these opinions are still mine
"Bill, look, we understand that you're interested in selling us this
operating system, but compare it to ours.  We can't possibly take such
a retrograde step."
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