linux-kernel - Re: [PATCH] vdpa: solidrun: constify pointers to hwmon_channel

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Date:   Mon, 10 Apr 2023 05:56:49 -0400
From:   "Michael S. Tsirkin" <mst@...hat.com>
To:     Guenter Roeck <linux@...ck-us.net>
Cc:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Alvaro Karsz <alvaro.karsz@...id-run.com>,
        Jason Wang <jasowang@...hat.com>,
        virtualization@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org, Jean Delvare <jdelvare@...e.com>,
        linux-hwmon@...r.kernel.org
Subject: Re: [PATCH] vdpa: solidrun: constify pointers to hwmon_channel_info

On Fri, Apr 07, 2023 at 04:08:30PM -0700, Guenter Roeck wrote:
> On 4/7/23 08:01, Krzysztof Kozlowski wrote:
> > Statically allocated array of pointed to hwmon_channel_info can be made
> > const for safety.
> > 
> > Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
> > 
> > ---
> > 
> > This depends on hwmon core patch:
> > https://lore.kernel.org/all/20230406203103.3011503-2-krzysztof.kozlowski@linaro.org/
> > 
> > Therefore I propose this should also go via hwmon tree.
> 
> I am not going to apply patches for 10+ subsystems through the hwmon tree.
> This can only result in chaos. The dependent patch is available at
> 
> git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging.git hwmon-const

Doesn't it cause build errors or warnings there?

> or wait until after the next commit window to apply this patch.
> 
> Thanks,
> Guenter
> 
> > 
> > Cc: Jean Delvare <jdelvare@...e.com>
> > Cc: Guenter Roeck <linux@...ck-us.net>
> > Cc: linux-hwmon@...r.kernel.org
> > ---
> >   drivers/vdpa/solidrun/snet_hwmon.c | 2 +-
> >   1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/drivers/vdpa/solidrun/snet_hwmon.c b/drivers/vdpa/solidrun/snet_hwmon.c
> > index e695e36ff753..65304354b34a 100644
> > --- a/drivers/vdpa/solidrun/snet_hwmon.c
> > +++ b/drivers/vdpa/solidrun/snet_hwmon.c
> > @@ -159,7 +159,7 @@ static const struct hwmon_ops snet_hwmon_ops = {
> >   	.read_string = snet_hwmon_read_string
> >   };
> > -static const struct hwmon_channel_info *snet_hwmon_info[] = {
> > +static const struct hwmon_channel_info * const snet_hwmon_info[] = {
> >   	HWMON_CHANNEL_INFO(temp, HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_LABEL,
> >   			   HWMON_T_INPUT | HWMON_T_CRIT | HWMON_T_LABEL),
> >   	HWMON_CHANNEL_INFO(power, HWMON_P_INPUT | HWMON_P_LABEL),