linux-kernel - Re: [PATCH] coresight: do not use the BIT() macro in the UAPI header

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Message-ID: <CANLsYkwVybRG9L6gDJTzZ=eXut66vJYfuEtOfLzaYaVpdybT1A@mail.gmail.com>
Date:   Tue, 24 Mar 2020 09:31:15 -0600
From:   Mathieu Poirier <mathieu.poirier@...aro.org>
To:     Eugene Syromiatnikov <esyr@...hat.com>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        linux-stm32@...md-mailman.stormreply.com,
        Pratik Patel <pratikp@...eaurora.org>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...com>,
        Michael Williams <michael.williams@....com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Chunyan Zhang <zhang.chunyan@...aro.org>,
        "Dmitry V. Levin" <ldv@...linux.org>
Subject: Re: [PATCH] coresight: do not use the BIT() macro in the UAPI header

On Mon, 23 Mar 2020 at 22:22, Eugene Syromiatnikov <esyr@...hat.com> wrote:
>
> The BIT() macro definition is not available for the UAPI headers
> (moreover, it can be defined differently in the user space); replace
> its usage with the _BITUL() macro that is defined in <linux/const.h>.
>
> Fixes: 237483aa5cf4 ("coresight: stm: adding driver for CoreSight STM component")
> Signed-off-by: Eugene Syromiatnikov <esyr@...hat.com>
> ---
>  include/uapi/linux/coresight-stm.h | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/include/uapi/linux/coresight-stm.h b/include/uapi/linux/coresight-stm.h
> index aac550a..8847dbf 100644
> --- a/include/uapi/linux/coresight-stm.h
> +++ b/include/uapi/linux/coresight-stm.h
> @@ -2,8 +2,10 @@
>  #ifndef __UAPI_CORESIGHT_STM_H_
>  #define __UAPI_CORESIGHT_STM_H_
>
> -#define STM_FLAG_TIMESTAMPED   BIT(3)
> -#define STM_FLAG_GUARANTEED    BIT(7)
> +#include <linux/const.h>
> +
> +#define STM_FLAG_TIMESTAMPED   _BITUL(3)
> +#define STM_FLAG_GUARANTEED    _BITUL(7)

Greg, if you want to pick this up right away:

Reviewed-by: Mathieu Poirier <mathieu.poirier@...aro.org>

Otherwise let me know and I'll add it to my next tree.

Thanks,
Mathieu

>
>  /*
>   * The CoreSight STM supports guaranteed and invariant timing
> --
> 2.1.4
>