linux-kernel - Re: [PATCH] staging: fbtft: Use ARRAY

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Date:   Sat, 29 Oct 2022 22:28:58 +0530
From:   Deepak R Varma <drv@...lo.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     outreachy@...ts.linux.dev, dri-devel@...ts.freedesktop.org,
        linux-fbdev@...r.kernel.org, linux-staging@...ts.linux.dev,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] staging: fbtft: Use ARRAY_SIZE() to get argument count

On Sat, Oct 29, 2022 at 09:32:50AM +0200, Greg Kroah-Hartman wrote:
> On Fri, Oct 28, 2022 at 07:00:05PM +0530, Deepak R Varma wrote:
> > The ARRAY_SIZE(foo) macro should be preferred over sizeof operator
> > based computation such as sizeof(foo)/sizeof(foo[0]) for finding
> > number of elements in an array. Issue identified using coccicheck.
> >
> > Signed-off-by: Deepak R Varma <drv@...lo.com>
> > ---
> >  drivers/staging/fbtft/fbtft.h | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/drivers/staging/fbtft/fbtft.h b/drivers/staging/fbtft/fbtft.h
> > index 2c2b5f1c1df3..5506a473be91 100644
> > --- a/drivers/staging/fbtft/fbtft.h
> > +++ b/drivers/staging/fbtft/fbtft.h
> > @@ -231,7 +231,7 @@ struct fbtft_par {
> >  	bool polarity;
> >  };
> >
> > -#define NUMARGS(...)  (sizeof((int[]){__VA_ARGS__}) / sizeof(int))
> > +#define NUMARGS(...)  ARRAY_SIZE(((int[]){ __VA_ARGS__ }))
>
> Please please please test-build your patches before sending them out.
> To not do so just wastes reviewer resources :(

Hello Greg,
I did build the .ko files by making the driver/staging/fbtft/ path. I verified
.o and .ko files were built.

I did a make clean just now and was again able to rebuild without any errors.
Please see the attached log file.

Is there something wrong with the way I am firing the build?

Thank you,
./drv

>
> thanks,
>
> greg k-h

View attachment "fbtft_build.log" of type "text/plain" (10910 bytes)