linux-kernel - Re: [PATCH v7 04/20] kernel: Add combined power-off+restart handler call chain API

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Message-ID: <3fc21eb5-218b-f783-a7ef-f805f13c66da@collabora.com>
Date:   Fri, 6 May 2022 18:10:33 +0300
From:   Dmitry Osipenko <dmitry.osipenko@...labora.com>
To:     "Rafael J. Wysocki" <rafael@...nel.org>
Cc:     Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Russell King <linux@...linux.org.uk>,
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Subject: Re: [PATCH v7 04/20] kernel: Add combined power-off+restart handler
 call chain API

On 4/20/22 21:47, Rafael J. Wysocki wrote:
>>>> +       void (*platform_power_off_cb)(void);
>>>> +       void (*simple_power_off_cb)(void *data);
>>>> +       void *simple_power_off_cb_data;
>>> Is there any particular reason to put these callbacks here and not
>>> directly into struct sys_off_handler?
>> They are used internally by reboot.c and shouldn't be touched by the
>> kernel API users, so I wanted to factor out and protect all the private
>> data.
> But they come from these users anyway, don't they?
> 

Yes, the point is that these callback pointers are owned by the kernel
core while callbacks are registered.

-- 
Best regards,
Dmitry