linux-kernel - Re: [PATCH -next] exit: export make_task

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Date:   Mon, 24 Jan 2022 11:30:15 -0800
From:   Randy Dunlap <rdunlap@...radead.org>
To:     Christoph Hellwig <hch@...radead.org>
Cc:     linux-kernel@...r.kernel.org,
        "Eric W. Biederman" <ebiederm@...ssion.com>,
        linux-ia64@...r.kernel.org, Tony Luck <tony.luck@...el.com>,
        kernel test robot <lkp@...el.com>
Subject: Re: [PATCH -next] exit: export make_task_dead()



On 1/24/22 01:20, Christoph Hellwig wrote:
> On Sat, Jan 22, 2022 at 09:48:34AM -0800, Randy Dunlap wrote:
>> In a config file from "kernel test robot <lkp@...el.com>" for a
>> different problem, this linker error was exposed when
>> CONFIG_IA64_MCA_RECOVERY=m.
>>
>> We could either export make_task_dead() or restrict IA64_MCA_RECOVERY
>> to a bool Kconfig symbol instead of a tristate symbol, so go with the

OK, I'll send a patch to do ^^^that^^^ instead.

>> EXPORT_SYMBOL() path.
>>
>> Fixes this build error:
>>
>> ERROR: modpost: "make_task_dead" [arch/ia64/kernel/mca_recovery.ko] undefined!
>>
>> Fixes: 0e25498f8cd4 ("exit: Add and use make_task_dead.")
>> Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
>> Cc: "Eric W. Biederman" <ebiederm@...ssion.com>
>> Cc: linux-ia64@...r.kernel.org
>> Cc: Tony Luck <tony.luck@...el.com>
>> Cc: kernel test robot <lkp@...el.com>
>> ---
>>  kernel/exit.c |    1 +
>>  1 file changed, 1 insertion(+)
>>
>> --- linux-next-20220121.orig/kernel/exit.c
>> +++ linux-next-20220121/kernel/exit.c
>> @@ -896,6 +896,7 @@ void __noreturn make_task_dead(int signr
>>  
>>  	do_exit(signr);
>>  }
>> +EXPORT_SYMBOL(make_task_dead);
> 
> EXPORT_SYMBOL_GPL and restricted, please.
> 
> Or even better: force the mca recovery code to be built in.

thanks.
-- 
~Randy