linux-kernel - Re: [PATCH -next v2] x86/power: fix doc warnings in cpu.c

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Date:   Fri, 18 Jun 2021 09:25:39 +0800
From:   "libaokun (A)" <libaokun1@...wei.com>
To:     "Rafael J. Wysocki" <rafael@...nel.org>
CC:     "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Pavel Machek <pavel@....cz>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        the arch/x86 maintainers <x86@...nel.org>,
        "H. Peter Anvin" <hpa@...or.com>,
        Linux PM <linux-pm@...r.kernel.org>,
        "Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>,
        Wei Yongjun <weiyongjun1@...wei.com>,
        Yue Haibing <yuehaibing@...wei.com>, <yangjihong1@...wei.com>,
        yu kuai <yukuai3@...wei.com>
Subject: Re: [PATCH -next v2] x86/power: fix doc warnings in cpu.c

Thank you for your advice.

I'm about to send a patch v3 with the changes to fix the warning.

Best Regards.


在 2021/6/18 1:32, Rafael J. Wysocki 写道:
> On Thu, Jun 17, 2021 at 2:12 PM Rafael J. Wysocki <rafael@...nel.org> wrote:
>> On Tue, Jun 15, 2021 at 5:26 AM Baokun Li <libaokun1@...wei.com> wrote:
>>> Fixes the following W=1 kernel build warning(s):
>>>
>>>   arch/x86/power/cpu.c:76: warning: Function parameter or
>>>    member 'ctxt' not described in '__save_processor_state'
>>>   arch/x86/power/cpu.c:192: warning: Function parameter or
>>>    member 'ctxt' not described in '__restore_processor_state'
>>>
>>> Signed-off-by: Baokun Li <libaokun1@...wei.com>
>>> ---
>>> V1->V2:
>>>          Fix the formatting of this kerneldoc comment
>>>
>>>   arch/x86/power/cpu.c | 31 ++++++++++++++++---------------
>>>   1 file changed, 16 insertions(+), 15 deletions(-)
>>>
>>> diff --git a/arch/x86/power/cpu.c b/arch/x86/power/cpu.c
>>> index 3a070e7cdb8b..54b530db5ed0 100644
>>> --- a/arch/x86/power/cpu.c
>>> +++ b/arch/x86/power/cpu.c
>>> @@ -58,19 +58,20 @@ static void msr_restore_context(struct saved_context *ctxt)
>>>   }
>>>
>>>   /**
>>> - *     __save_processor_state - save CPU registers before creating a
>>> - *             hibernation image and before restoring the memory state from it
>>> - *     @ctxt - structure to store the registers contents in
>>> + * __save_processor_statei() - Save CPU registers before creating a
>>> + *                             hibernation image and before restoring
>>> + *                             the memory state from it
>>> + * @ctxt: Structure to store the registers contents in.
>>>    *
>>> - *     NOTE: If there is a CPU register the modification of which by the
>>> - *     boot kernel (ie. the kernel used for loading the hibernation image)
>>> - *     might affect the operations of the restored target kernel (ie. the one
>>> - *     saved in the hibernation image), then its contents must be saved by this
>>> - *     function.  In other words, if kernel A is hibernated and different
>>> - *     kernel B is used for loading the hibernation image into memory, the
>>> - *     kernel A's __save_processor_state() function must save all registers
>>> - *     needed by kernel A, so that it can operate correctly after the resume
>>> - *     regardless of what kernel B does in the meantime.
>>> + * NOTE: If there is a CPU register the modification of which by the
>>> + * boot kernel (ie. the kernel used for loading the hibernation image)
>>> + * might affect the operations of the restored target kernel (ie. the one
>>> + * saved in the hibernation image), then its contents must be saved by this
>>> + * function.  In other words, if kernel A is hibernated and different
>>> + * kernel B is used for loading the hibernation image into memory, the
>>> + * kernel A's __save_processor_state() function must save all registers
>>> + * needed by kernel A, so that it can operate correctly after the resume
>>> + * regardless of what kernel B does in the meantime.
>>>    */
>>>   static void __save_processor_state(struct saved_context *ctxt)
>>>   {
>>> @@ -181,9 +182,9 @@ static void fix_processor_context(void)
>>>   }
>>>
>>>   /**
>>> - * __restore_processor_state - restore the contents of CPU registers saved
>>> - *                             by __save_processor_state()
>>> - * @ctxt - structure to load the registers contents from
>>> + * __restore_processor_state() - Restore the contents of CPU registers saved
>>> + *                               by __save_processor_state()
>>> + * @ctxt: Structure to load the registers contents from.
>>>    *
>>>    * The asm code that gets us here will have restored a usable GDT, although
>>>    * it will be pointing to the wrong alias.
>>> --
>> Applied as 5.14 material, thanks!
> And dropped, because it introduced a build issue.
> .