linux-kernel - Re: [PATCH v2 2/3] vc04_services: mmal-vchiq: Use bool for vchiq_mmal_component.in

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Message-ID: <CAPY8ntDMM-0S_gz5A+4rWQ7M2gmUMeOYRW__cr8v=afo5fM_sA@mail.gmail.com>
Date:   Fri, 18 Nov 2022 17:22:12 +0000
From:   Dave Stevenson <dave.stevenson@...pberrypi.com>
To:     Kieran Bingham <kieran.bingham@...asonboard.com>
Cc:     Broadcom internal kernel review list 
        <bcm-kernel-feedback-list@...adcom.com>,
        Dan Carpenter <error27@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        Mauro Carvalho Chehab <mchehab+samsung@...nel.org>,
        Ray Jui <rjui@...adcom.com>,
        Umang Jain <umang.jain@...asonboard.com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-rpi-kernel@...ts.infradead.org, linux-staging@...ts.linux.dev
Subject: Re: [PATCH v2 2/3] vc04_services: mmal-vchiq: Use bool for vchiq_mmal_component.in_use

Hi Umang & Kieran

On Fri, 18 Nov 2022 at 10:30, Kieran Bingham
<kieran.bingham@...asonboard.com> wrote:
>
> Quoting Umang Jain (2022-11-18 08:42:43)
> > In commit 7967656ffbfa ("coding-style: Clarify the expectations around
> > bool") the check to dis-allow bool structure members was removed from
> > checkpatch.pl. It promotes bool structure members to store boolean
> > values. This enhances code readability.
>
> This only talks about 7967656ffbfa as I can interpret it.  A sentence
> here describing what we're going to do about it in /this/ patch would be
> clearer as a second paragraph:
>
> """
> Convert the remaining bit-field storage for 'in-use' to a bool and use
> it accordingly.
> """
>
> But that's trivial and not worth a v3 specifically. (unless anyone
> applying this wants to add it).

Totally agree.

> Reviewed-by: Kieran Bingham <kieran.bingham@...asonboard.com>

Reviewed-by: Dave Stevenson <dave.stevenson@...pberrypi.com>

> >
> > Signed-off-by: Umang Jain <umang.jain@...asonboard.com>
> > ---
> >  drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.c | 6 +++---
> >  drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.h | 2 +-
> >  2 files changed, 4 insertions(+), 4 deletions(-)
> >
> > diff --git a/drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.c b/drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.c
> > index 4abb6178cb9f..294b184d4a49 100644
> > --- a/drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.c
> > +++ b/drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.c
> > @@ -1648,7 +1648,7 @@ int vchiq_mmal_component_init(struct vchiq_mmal_instance *instance,
> >         for (idx = 0; idx < VCHIQ_MMAL_MAX_COMPONENTS; idx++) {
> >                 if (!instance->component[idx].in_use) {
> >                         component = &instance->component[idx];
> > -                       component->in_use = 1;
> > +                       component->in_use = true;
> >                         break;
> >                 }
> >         }
> > @@ -1724,7 +1724,7 @@ int vchiq_mmal_component_init(struct vchiq_mmal_instance *instance,
> >         destroy_component(instance, component);
> >  unlock:
> >         if (component)
> > -               component->in_use = 0;
> > +               component->in_use = false;
> >         mutex_unlock(&instance->vchiq_mutex);
> >
> >         return ret;
> > @@ -1747,7 +1747,7 @@ int vchiq_mmal_component_finalise(struct vchiq_mmal_instance *instance,
> >
> >         ret = destroy_component(instance, component);
> >
> > -       component->in_use = 0;
> > +       component->in_use = false;
> >
> >         mutex_unlock(&instance->vchiq_mutex);
> >
> > diff --git a/drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.h b/drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.h
> > index 6d984cf5a83a..09f030919d4e 100644
> > --- a/drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.h
> > +++ b/drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.h
> > @@ -82,7 +82,7 @@ struct vchiq_mmal_port {
> >  };
> >
> >  struct vchiq_mmal_component {
> > -       u32 in_use:1;
> > +       bool in_use;
> >         bool enabled;
> >         u32 handle;  /* VideoCore handle for component */
> >         u32 inputs;  /* Number of input ports */
> > --
> > 2.38.1
> >