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

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Message-ID: <Y2vOrxwi1diR0JEY@kroah.com>
Date:   Wed, 9 Nov 2022 17:00:47 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Deepak R Varma <drv@...lo.com>
Cc:     Julia Lawall <julia.lawall@...ia.fr>, 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 Wed, Nov 09, 2022 at 08:30:52PM +0530, Deepak R Varma wrote:
> On Fri, Nov 04, 2022 at 08:12:11PM +0530, Deepak R Varma wrote:
> > On Fri, Nov 04, 2022 at 05:31:24PM +0530, Deepak R Varma wrote:
> > > On Mon, Oct 31, 2022 at 01:05:32PM +0100, Julia Lawall wrote:
> > > >
> > > >
> > > > I took a look, but it's pretty complex.  You could take the code and
> > > > reorganize it so that it is more readable, and then take the definition of
> > > > the ARRAY_SIZE macro, to better see what is going on.
> > > >
> > > > julia
> > > >
> > >
> > > Hello Greg, Julia,
> > > I was able to successfully build the fbtft object file for arm architecture as
> > > well. I used gcc 6.5.0 and 9.5.0 tool chains. It was successful using both. I
> > > have attached the build log from my machine for your reference.
> > >
> > > I am also looking at the .i file and rearrange the expanded macro to understand
> > > it. However, since it is built successfully, I am not sure if that is truly the
> > > problem area.
> > >
> > > Should I resend the patch and check if it still errors the kernel build bot?
> > > Anything else I can try?
> >
> > Looks like the change I proposed is causing nesting inside the write_reg
> > function due to additional set of { & } brackets for the __VA_ARGS__ symbol.
> >
> > Am I understanding it right?
> 
> Hello Julia, Greg,
> I am unable to reproduce this build failure on my local machine. I tried the X86
> and arm based build. I am unable to troubleshoot this further. Do you have any
> other suggestions? If not, I will drop this patch from my watch list.

Please just drop it, it is not a correct change to make.

thanks,

greg k-h