linux-kernel - Re: Possible regression due to 269a535ca931 "modpost: generate vmlinux.symvers and reuse it for the second modpost"

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Message-ID: <985bf10d-336c-61f6-8b9d-d8c6fb48634a@arm.com>
Date:   Fri, 5 Mar 2021 14:15:46 +0000
From:   Vladimir Murzin <vladimir.murzin@....com>
To:     Masahiro Yamada <masahiroy@...nel.org>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        Michal Marek <michal.lkml@...kovi.net>,
        Arnd Bergmann <arnd@...db.de>
Subject: Re: Possible regression due to 269a535ca931 "modpost: generate
 vmlinux.symvers and reuse it for the second modpost"

On 3/4/21 5:24 PM, Masahiro Yamada wrote:
> On Fri, Mar 5, 2021 at 1:21 AM Vladimir Murzin <vladimir.murzin@....com> wrote:
> [  snip long description ]
> 
>>
>> Does that make sense? What I'm missing?
>>
>> P.S.
>> I've also checked v5.12-rc1 and see the same symptoms
> 
> Since you ran "make allnoconfig",
> the module feature was disabled.
> (CONFIG_MODULES=n)
> 
> That is why you cannot build external modules.

That's a good point, yet was not reason for my issue :) It forced me to try with ARCH=arm
(and update toolchain)

$ CROSS_COMPILE=arm-none-linux-gnueabihf- make ARCH=arm mrproper
$ CROSS_COMPILE=arm-none-linux-gnueabihf- make ARCH=arm vexpress_defconfig
$ grep -w CONFIG_MODULES .config
CONFIG_MODULES=y
$ grep "=m" .config
$ echo $?
1
$ CROSS_COMPILE=arm-none-linux-gnueabihf- make ARCH=arm Image -j5 > /dev/null 
$ ls *.symvers
vmlinux.symvers
$ CROSS_COMPILE=arm-none-linux-gnueabihf- make ARCH=arm Image -j5 modules > /dev/null 
$ ls *.symvers
Module.symvers  vmlinux.symvers

So, `make modules` seems to become be mandatory. I'll go and update my scripts...

Cheers
Vladimir


> 
> 
> 
>> Cheers
>> Vladimir
> 
> 
> 
> 
> --
> Best Regards
> Masahiro Yamada
>