linux-kernel - Re: [PATCH] memory: renesas-rpc-if: Silence clang warning

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Date:   Mon, 22 Nov 2021 09:34:21 +0000
From:   "Lad, Prabhakar" <prabhakar.csengg@...il.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
Cc:     Geert Uytterhoeven <geert@...ux-m68k.org>,
        Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Wolfram Sang <wsa+renesas@...g-engineering.com>,
        Biju Das <biju.das.jz@...renesas.com>,
        Linux-Renesas <linux-renesas-soc@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>, llvm@...ts.linux.dev
Subject: Re: [PATCH] memory: renesas-rpc-if: Silence clang warning

On Mon, Nov 22, 2021 at 9:32 AM Krzysztof Kozlowski
<krzysztof.kozlowski@...onical.com> wrote:
>
> On 22/11/2021 09:46, Lad, Prabhakar wrote:
> > Hi Geert,
> >
> > Thank you for the review.
> >
> > On Mon, Nov 22, 2021 at 7:50 AM Geert Uytterhoeven <geert@...ux-m68k.org> wrote:
> >>
> >> Hi Prabhakar,
> >>
> >> On Sun, Nov 21, 2021 at 7:05 PM Lad Prabhakar
> >> <prabhakar.mahadev-lad.rj@...renesas.com> wrote:
> >>> This patch silences the following clang warning:
> >>>
> >>> | drivers/memory/renesas-rpc-if.c:253:14: warning: cast to smaller integer
> >>> | type 'enum rpcif_type' from 'const void *' [-Wvoid-pointer-to-enum-cast]
> >>> |           rpc->type = (enum rpcif_type)of_device_get_match_data(dev);
> >>> |                       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> >>>
> >>> Fixes: b04cc0d912eb8 ("memory: renesas-rpc-if: Add support for RZ/G2L")
> >>> Reported-by: kernel test robot <lkp@...el.com>
> >>> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
> >>
> >> Reviewed-by: Geert Uytterhoeven <geert+renesas@...der.be>
> >>
> >>> --- a/drivers/memory/renesas-rpc-if.c
> >>> +++ b/drivers/memory/renesas-rpc-if.c
> >>> @@ -250,7 +250,7 @@ int rpcif_sw_init(struct rpcif *rpc, struct device *dev)
> >>>                 return PTR_ERR(rpc->dirmap);
> >>>         rpc->size = resource_size(res);
> >>>
> >>> -       rpc->type = (enum rpcif_type)of_device_get_match_data(dev);
> >>> +       rpc->type = (enum rpcif_type)(uintptr_t)of_device_get_match_data(dev);
> >>
> >> While correct, the cast to "enum rpcif_type" is not stricly needed anymore.
> >>
> > Agreed.
> >
> > @Krzysztof, let me know if you want me to resend the patch with the
> > cast to "enum rpcif_type" dropped.
>
> I can fix it when applying, thanks!
>
Thank you.

Cheers,
Prabhakar

>
> Best regards,
> Krzysztof