linux-kernel - Re: [PATCH] fpga: dfl-fme: constify pointers to hwmon_channel

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Date:   Tue, 11 Apr 2023 13:57:00 +0000
From:   Xu Yilun <yilun.xu@...el.com>
To:     Guenter Roeck <linux@...ck-us.net>
Cc:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Wu Hao <hao.wu@...el.com>, Tom Rix <trix@...hat.com>,
        Moritz Fischer <mdf@...nel.org>, linux-fpga@...r.kernel.org,
        linux-kernel@...r.kernel.org, Jean Delvare <jdelvare@...e.com>,
        linux-hwmon@...r.kernel.org
Subject: Re: [PATCH] fpga: dfl-fme: constify pointers to hwmon_channel_info

On 2023-04-07 at 16:08:45 -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
> 
> or wait until after the next commit window to apply this patch.

OK, I could apply this patch to linux-fpga in next cycle.

Thanks,
Yilun

> 
> Thanks,
> Guenter
> 
> > 
> > Cc: Jean Delvare <jdelvare@...e.com>
> > Cc: Guenter Roeck <linux@...ck-us.net>
> > Cc: linux-hwmon@...r.kernel.org
> > ---
> >   drivers/fpga/dfl-fme-main.c | 4 ++--
> >   1 file changed, 2 insertions(+), 2 deletions(-)
> > 
> > diff --git a/drivers/fpga/dfl-fme-main.c b/drivers/fpga/dfl-fme-main.c
> > index 77ea04d4edbe..bcb5d34b3b82 100644
> > --- a/drivers/fpga/dfl-fme-main.c
> > +++ b/drivers/fpga/dfl-fme-main.c
> > @@ -265,7 +265,7 @@ static const struct hwmon_ops thermal_hwmon_ops = {
> >   	.read = thermal_hwmon_read,
> >   };
> > -static const struct hwmon_channel_info *thermal_hwmon_info[] = {
> > +static const struct hwmon_channel_info * const thermal_hwmon_info[] = {
> >   	HWMON_CHANNEL_INFO(temp, HWMON_T_INPUT | HWMON_T_EMERGENCY |
> >   				 HWMON_T_MAX   | HWMON_T_MAX_ALARM |
> >   				 HWMON_T_CRIT  | HWMON_T_CRIT_ALARM),
> > @@ -465,7 +465,7 @@ static const struct hwmon_ops power_hwmon_ops = {
> >   	.write = power_hwmon_write,
> >   };
> > -static const struct hwmon_channel_info *power_hwmon_info[] = {
> > +static const struct hwmon_channel_info * const power_hwmon_info[] = {
> >   	HWMON_CHANNEL_INFO(power, HWMON_P_INPUT |
> >   				  HWMON_P_MAX   | HWMON_P_MAX_ALARM |
> >   				  HWMON_P_CRIT  | HWMON_P_CRIT_ALARM),
>