linux-kernel - Re: [PATCH] staging: r8188eu: remove local BIT macro

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Date:   Mon, 21 Mar 2022 12:07:24 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     David Laight <David.Laight@...LAB.COM>
Cc:     Martin Kaiser <martin@...ser.cx>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Larry Finger <Larry.Finger@...inger.net>,
        Phillip Potter <phil@...lpotter.co.uk>,
        Michael Straube <straube.linux@...il.com>,
        "linux-staging@...ts.linux.dev" <linux-staging@...ts.linux.dev>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] staging: r8188eu: remove local BIT macro

On Mon, Mar 21, 2022 at 09:04:46AM +0000, David Laight wrote:
> From: Dan Carpenter
> > Sent: 21 March 2022 08:16
> > 
> > This version is better, thanks!
> > 
> > Reviewed-by: Dan Carpenter <dan.carpenter@...cle.com>
> > 
> > What the GCC devs should have done is run their checker on real code and
> > silence the common false positives.  There are a few ways to do this.
> > You could make ~ a special case.  They already ignore truncated sign
> > extension so they could equally well ignore truncation when all it's a
> > 32 bits which are all set to 1.  Probably the best answer is to do both.
> 
> Or start using -(BIT_VALUE + 1) instead of ~BIT_VALUE :-)
> 

You are a bad person.  :P

regards,
dan carpenter