linux-kernel - Re: [PATCH v4 2/7] moduleparam: add data member to struct kernel

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Date:   Mon, 2 Aug 2021 17:18:41 +0100
From:   Emil Velikov <emil.l.velikov@...il.com>
To:     Jim Cromie <jim.cromie@...il.com>
Cc:     Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Harry Wentland <harry.wentland@....com>,
        Leo Li <sunpeng.li@....com>,
        Alex Deucher <alexander.deucher@....com>,
        Christian König <christian.koenig@....com>,
        "Pan, Xinhui" <Xinhui.Pan@....com>,
        Zhenyu Wang <zhenyuw@...ux.intel.com>,
        Zhi Wang <zhi.a.wang@...el.com>,
        Jani Nikula <jani.nikula@...ux.intel.com>,
        Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
        Rodrigo Vivi <rodrigo.vivi@...el.com>,
        Jason Baron <jbaron@...mai.com>,
        Ashley Thomas <Ashley.Thomas2@....com>,
        Aurabindo Pillai <aurabindo.pillai@....com>,
        Qingqing Zhuo <qingqing.zhuo@....com>,
        Wyatt Wood <Wyatt.Wood@....com>, Jessica Yu <jeyu@...nel.org>,
        Johan Hovold <johan@...nel.org>, Joe Perches <joe@...ches.com>,
        Miguel Ojeda <ojeda@...nel.org>,
        Nick Desaulniers <ndesaulniers@...ogle.com>,
        ML dri-devel <dri-devel@...ts.freedesktop.org>,
        "Linux-Kernel@...r. Kernel. Org" <linux-kernel@...r.kernel.org>,
        amd-gfx mailing list <amd-gfx@...ts.freedesktop.org>,
        intel-gvt-dev@...ts.freedesktop.org,
        Intel Graphics Development <intel-gfx@...ts.freedesktop.org>
Subject: Re: [PATCH v4 2/7] moduleparam: add data member to struct kernel_param

Hi Jim,

On Sat, 31 Jul 2021 at 22:42, Jim Cromie <jim.cromie@...il.com> wrote:

> Use of this new data member will be rare, it might be worth redoing
> this as a separate/sub-type to keep the base case.
>
> Signed-off-by: Jim Cromie <jim.cromie@...il.com>
> ---
>  include/linux/moduleparam.h | 11 +++++++++--
>  1 file changed, 9 insertions(+), 2 deletions(-)
>
> diff --git a/include/linux/moduleparam.h b/include/linux/moduleparam.h
> index eed280fae433..e9495b1e794d 100644
> --- a/include/linux/moduleparam.h
> +++ b/include/linux/moduleparam.h
> @@ -78,6 +78,7 @@ struct kernel_param {
>                 const struct kparam_string *str;
>                 const struct kparam_array *arr;
>         };
> +       void *data;

Might as well make this "const void *" since it is a compile-time constant?

-Emil