linux-kernel - Re: [GIT PULL] kbuild changes for v4.9-rc1

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Date:   Sun, 18 Dec 2016 11:49:29 +0100
From:   Jiri Slaby <jslaby@...e.cz>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     Adam Borowski <kilobyte@...band.pl>,
        Nicholas Piggin <npiggin@...il.com>,
        Omar Sandoval <osandov@...ndov.com>,
        Michal Marek <mmarek@...e.com>,
        Alexey Dobriyan <adobriyan@...il.com>,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        Al Viro <viro@...iv.linux.org.uk>,
        Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "linux-arch@...r.kernel.org" <linux-arch@...r.kernel.org>
Subject: Re: [GIT PULL] kbuild changes for v4.9-rc1

On 12/18/2016, 12:59 AM, Linus Torvalds wrote:
> On Sat, Dec 17, 2016 at 12:57 AM, Jiri Slaby <jslaby@...e.cz> wrote:
>>
>> Yes, disk drivers won't load:
>> [    2.141973] virtio_pci: disagrees about version of symbol mcount
>> [    2.144415] virtio_pci: Unknown symbol mcount (err -22)
> 
> This makes no sense.
> 
> mcount isn't even one of the symbols that the patch by Adam is touching.

asm-prototypes.h in his patch includes asm/ftrace.h, where the function
is declared. That should be enough IIUC scripts/Makefile.build.

> There's something else screwed up here. Not to mention that others
> don't have your issue.

I suppose people don't run i386 kernels or have different config.

> Do you have some other hacks in this area? Are you testing actual
> plain 4.9, or do you (for example) still carry Arnd's patch around
> that turned out to not work (reverted by f27c2f69cc8e in my tree)?

Not at all. This was plain 4.9 packaged by suse -- only rpm-related
fixes. I tried plain 4.9 without rpm right now with the same output:
# insmod soundcore.ko
[   31.582326] soundcore: disagrees about version of symbol mcount
[   31.586183] soundcore: Unknown symbol mcount (err -22)
insmod: ERROR: could not insert module soundcore.ko: Invalid parameters


$ git describe @
v4.9
$ git status
HEAD detached at v4.9


thanks,
-- 
js
suse labs