linux-kernel - Re: [linux-next]Build Failure: kernel/watchdog.c:936:2: error: too many arguments

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Message-ID: <562a79d1-e8a4-4d8f-a576-47c017aadf93@linux.ibm.com>
Date: Wed, 30 Apr 2025 11:57:12 +0530
From: Venkat Rao Bagalkote <venkat88@...ux.ibm.com>
To: Stephen Rothwell <sfr@...b.auug.org.au>, luogengkun@...weicloud.com,
        Andrew Morton <akpm@...ux-foundation.org>
Cc: Madhavan Srinivasan <maddy@...ux.ibm.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Linux Next Mailing List <linux-next@...r.kernel.org>,
        dianders@...omium.org, joel.granados@...nel.org, song@...nel.org,
        Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [linux-next]Build Failure: kernel/watchdog.c:936:2: error: too
 many arguments


On 28/04/25 3:11 pm, Venkat Rao Bagalkote wrote:
>
> On 28/04/25 4:11 am, Stephen Rothwell wrote:
>> Hi all,
>>
>> On Sat, 26 Apr 2025 20:39:26 +0530 Venkat Rao Bagalkote 
>> <venkat88@...ux.ibm.com> wrote:
>>> I am observing below build failure on IBM Power8 server with 
>>> linux-next-20250424 repo.
>>>
>>> This issue seems to be introduced by the below commit. After 
>>> reverting the below commit, kernel build is successful.
>>>
>>> Bad Commit: 6b07f9a0fa41 watchdog: fix watchdog may detect false 
>>> positive of softlockup
>>>
>>> Note: To hit this issue, one should first resolve this [1] 
>>> <https://lore.kernel.org/all/e8bf676e-7bf0-4896-b104-ac75e1b22d2e@linux.ibm.com/>
>>>
>>> Repo: 
>>> https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
>>> Branch: master
>>> GCC: 8.5.0 20210514
>>> ldd (GNU libc) 2.28
>>>
>>> Attached is the .config file.
>>>
>>> Errors:
>>>
>>> kernel/watchdog.c: In function 'lockup_detector_reconfigure':
>>> kernel/watchdog.c:936:2: error: too many arguments to function 
>>> '__lockup_detector_reconfigure'
>>>     __lockup_detector_reconfigure(false);
>>>     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>>> kernel/watchdog.c:926:13: note: declared here
>>>    static void __lockup_detector_reconfigure(void)
>>>                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>>> kernel/watchdog.c: In function 'lockup_detector_setup':
>>> kernel/watchdog.c:940:2: error: too many arguments to function 
>>> '__lockup_detector_reconfigure'
>>>     __lockup_detector_reconfigure(false);
>>>     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>>> kernel/watchdog.c:926:13: note: declared here
>>>    static void __lockup_detector_reconfigure(void)
>>>                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>>> kernel/watchdog.c: In function 'proc_watchdog_update':
>>> kernel/watchdog.c:962:2: error: too many arguments to function 
>>> '__lockup_detector_reconfigure'
>>>     __lockup_detector_reconfigure(thresh_changed);
>>>     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>>> kernel/watchdog.c:926:13: note: declared here
>>>    static void __lockup_detector_reconfigure(void)
>>>                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>>>
>>> If you happen to fix this, please add below tag.
>>>
>>> Reported-by: Venkat Rao Bagalkote <venkat88@...ux.ibm.com>
>> Yeah, the CONFIG_SOFTLOCKUP_DETECTOR unset version of
>> __lockup_detector_reconfigure() was not updated :-(
>

Hello Stephen,


Will this be fixed, or from now on we will have to set the 
SOFTLOCKUP_DETECTOR always in the .config file.


Trying to understand the way forward.


Regards,

Venkat.

>
> After seeting CONFIG_SOFTLOCKUP_DETECTOR kernel build is successful.
>
>
> Regards,
>
> Venkat.
>
>>
>> This is now commit
>>
>>    45c4eb661074 ("watchdog: fix watchdog may detect false positive of 
>> softlockup")
>>
>> in the mm-nonmm-unstable tree.
>>