linux-kernel - Re: [PATCH] gcov: include linux/module.h for within

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Message-ID: <eea3ce6a-732b-5c1d-9975-eddaeee21cf5@infradead.org>
Date:   Fri, 29 Mar 2019 11:10:49 -0700
From:   Randy Dunlap <rdunlap@...radead.org>
To:     Nick Desaulniers <ndesaulniers@...gle.com>
Cc:     Peter Oberparleiter <oberpar@...ux.ibm.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Greg Hackmann <ghackmann@...roid.com>,
        Tri Vo <trong@...roid.com>,
        Linux Memory Management List <linux-mm@...ck.org>,
        kbuild-all@...org, kbuild test robot <lkp@...el.com>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] gcov: include linux/module.h for within_module

On 3/29/19 11:09 AM, Nick Desaulniers wrote:
> On Fri, Mar 29, 2019 at 11:01 AM Randy Dunlap <rdunlap@...radead.org> wrote:
>>
>> On 3/29/19 10:45 AM, Nick Desaulniers wrote:
>>> Fixes commit 8c3d220cb6b5 ("gcov: clang support")
>>>
>>> Cc: Greg Hackmann <ghackmann@...roid.com>
>>> Cc: Tri Vo <trong@...roid.com>
>>> Cc: Peter Oberparleiter <oberpar@...ux.ibm.com>
>>> Cc: linux-mm@...ck.org
>>> Cc: kbuild-all@...org
>>> Reported-by: kbuild test robot <lkp@...el.com>
>>> Link: https://marc.info/?l=linux-mm&m=155384681109231&w=2
>>> Signed-off-by: Nick Desaulniers <ndesaulniers@...gle.com>
>>
>> Reported-by: Randy Dunlap <rdunlap@...radead.org>
>> see https://lore.kernel.org/linux-mm/20190328225107.ULwYw%25akpm@linux-foundation.org/T/#mee26c00158574326e807480fc39dfcbd7bebd5fd
>>
>> Did you test this?
> 
> Yes, built with gcc 7.3 and
> defconfig
> +
> CONFIG_GCOV_KERNEL=y
> CONFIG_ARCH_HAS_GCOV_PROFILE_ALL=y
> CONFIG_GCOV_FORMAT_4_7=y
> 
>> kernel/gcov/gcc_4_7.c includes local "gcov.h",
>> which includes <linux/module.h>, so why didn't that work or why
>> does this patch work?
> 
> Good point. May be something in the configs from 0-day bot.  Boarding
> a plane for Bangkok, but can dig further once landed.
> 
> Maybe module support was disabled?

Yes, I reported the problem with CONFIG_MODULES not enabled.


-- 
~Randy