linux-kernel - Re: [PATCH] ARM: OMAP: dma: Mark expected switch fall-throughs

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Message-ID: <20190813120049.GV52127@atomide.com>
Date:   Tue, 13 Aug 2019 05:00:49 -0700
From:   Tony Lindgren <tony@...mide.com>
To:     Kees Cook <keescook@...omium.org>
Cc:     "Gustavo A. R. Silva" <gustavo@...eddedor.com>,
        Aaro Koskinen <aaro.koskinen@....fi>,
        Russell King <linux@...linux.org.uk>,
        linux-arm-kernel@...ts.infradead.org, linux-omap@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Stephen Rothwell <sfr@...b.auug.org.au>
Subject: Re: [PATCH] ARM: OMAP: dma: Mark expected switch fall-throughs

* Kees Cook <keescook@...omium.org> [190729 16:35]:
> On Sun, Jul 28, 2019 at 06:22:40PM -0500, Gustavo A. R. Silva wrote:
> > Mark switch cases where we are expecting to fall through.
> > 
> > This patch fixes the following warnings:
> > 
> > arch/arm/plat-omap/dma.c: In function 'omap_set_dma_src_burst_mode':
> > arch/arm/plat-omap/dma.c:384:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
> >    if (dma_omap2plus()) {
> >       ^
> > arch/arm/plat-omap/dma.c:393:2: note: here
> >   case OMAP_DMA_DATA_BURST_16:
> >   ^~~~
> > arch/arm/plat-omap/dma.c:394:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
> >    if (dma_omap2plus()) {
> >       ^
> > arch/arm/plat-omap/dma.c:402:2: note: here
> >   default:
> >   ^~~~~~~
> > arch/arm/plat-omap/dma.c: In function 'omap_set_dma_dest_burst_mode':
> > arch/arm/plat-omap/dma.c:473:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
> >    if (dma_omap2plus()) {
> >       ^
> > arch/arm/plat-omap/dma.c:481:2: note: here
> >   default:
> >   ^~~~~~~
> > 
> > Notice that, in this particular case, the code comment is
> > modified in accordance with what GCC is expecting to find.
> > 
> > Reported-by: Stephen Rothwell <sfr@...b.auug.org.au>
> > Signed-off-by: Gustavo A. R. Silva <gustavo@...eddedor.com>
> 
> Reviewed-by: Kees Cook <keescook@...omium.org>

Applying into fixes thanks.

Tony