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From:   Masahiro Yamada <yamada.masahiro@socionext.com>
Date:   Fri, 4 Oct 2019 12:40:56 +0900
Message-ID: <CAK7LNATLCG6DOsnqfFNe61NkcEHV1fS4fCWyy2qzMHVvDDHHHw@mail.gmail.com>
Subject: Re: nsdeps not working on modules in 5.4-rc1
To:     Steve French <smfrench@gmail.com>
Cc:     Matthias Maennich <maennich@google.com>,
        LKML <linux-kernel@vger.kernel.org>,
        CIFS <linux-cifs@vger.kernel.org>, Jessica Yu <jeyu@kernel.org>
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Sender: linux-kernel-owner@vger.kernel.org
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Hi Steve,

On Fri, Oct 4, 2019 at 1:07 AM Steve French <smfrench@gmail.com> wrote:
>
> On Thu, Oct 3, 2019 at 10:24 AM Masahiro Yamada
> <yamada.masahiro@socionext.com> wrote:
> >
> > Hi Steve,
> >
> > On Fri, Oct 4, 2019 at 12:15 AM Steve French <smfrench@gmail.com> wrote:
> > >
> > > On Thu, Oct 3, 2019 at 5:43 AM Matthias Maennich <maennich@google.com> wrote:
> > > >
> > > > Hi Steve!
> > > >
> > > > On Wed, Oct 02, 2019 at 06:54:26PM -0500, Steve French wrote:
> > > > >And running the build differently, from the root of the git tree
> > > > >(5.4-rc1) rather than using the Ubuntu 5.4-rc1 headers also fails
> > > > >
> > > > >e.g. "make  M=fs/cifs modules nsdeps"
> > > > >
> > > > >...
> > > > >  LD [M]  fs/cifs/cifs.o
> > > > >  Building modules, stage 2.
> > > > >  MODPOST 1 modules
> > > > >WARNING: module cifs uses symbol sigprocmask from namespace
> > > > >_fs/cifs/cache.o), but does not import it.
> > > > >...
> > > > >WARNING: module cifs uses symbol posix_test_lock from namespace
> > > > >cifs/cache.o), but does not import it.
> > > > >  CC [M]  fs/cifs/cifs.mod.o
> > > > >  LD [M]  fs/cifs/cifs.ko
> > > > >  Building modules, stage 2.
> > > > >  MODPOST 1 modules
> > > > >./scripts/nsdeps: 34: local: ./fs/cifs/cifsfs.c: bad variable name
> > > > >make: *** [Makefile:1710: nsdeps] Error 2
> > > >
> > > > Thanks for reporting this. It appears to me you hit a bug that was
> > > > recently discovered: when building with `make M=some/subdirectory`,
> > > > modpost is misbehaving. Can you try whether this patch series solves
> > > > your problems:
> > > > https://lore.kernel.org/lkml/20191003075826.7478-1-yamada.masahiro@socionext.com/
> > > > In particular patch 2/6 out of the series.
> > > >
> > > > Cheers,
> > > > Matthias
> > >
> > >
> > > Applying just patch 2 and doing "make" from the root of the git tree
> > > (5.4-rc1), at the tail end of the build I got
> > >
> > > ...
> > > Kernel: arch/x86/boot/bzImage is ready  (#87)
> > >   Building modules, stage 2.
> > >   MODPOST 5340 modules
> > > free(): invalid pointer
> > > Aborted (core dumped)
> >
> >
> > Right.
> >
> > Since 2/6 depends on 1/6,
> > applying only the second one does not work.
>
> Applying both 1 and 2 I get the following error doing make (although
> it makes it a long way into the build)
>
> <snip>
> WARNING: drivers/usb/storage/usb-storage: 'USB_STORAGE' exported
> twice. Previous export was in drivers/usb/storage/usb-storage.ko
> ERROR: "usb_stor_set_xfer_buf" [drivers/usb/storage/ums-usbat.ko] undefined!
> ERROR: "usb_stor_access_xfer_buf" [drivers/usb/storage/ums-usbat.ko] undefined!
> ERROR: "usb_stor_post_reset" [drivers/usb/storage/ums-usbat.ko] undefined!
> ERROR: "usb_stor_disconnect" [drivers/usb/storage/ums-usbat.ko] undefined!
> <snip>
> ERROR: "usb_stor_adjust_quirks" [drivers/usb/storage/uas.ko] undefined!
> ERROR: "usb_stor_sense_invalidCDB" [drivers/usb/storage/uas.ko] undefined!
> WARNING: "USB_STORAGE" [drivers/usb/storage/usb-storage] is a static
> EXPORT_SYMBOL_GPL
> make[1]: *** [scripts/Makefile.modpost:94: __modpost] Error 1
> make: *** [Makefile:1303: modules] Error 2


Hmm, I do not see those error.
I was able to build the kernel successfully.
(I asked the 0-day bot to test whole of my patch set
in case I am missing something.)


Could you share the steps to reproduce the errors and your .config file?


> Running "make M=fs/cifs nsdeps" I still get the error

Sorry, I do not understand why you are doing this.


>
>   Building modules, stage 2.
>   MODPOST 1 modules
> ./scripts/nsdeps: 34: local: ./fs/cifs/cifsfs.c: bad variable name
> make: *** [Makefile:1710: nsdeps] Error 2
>
>
>
> --
> Thanks,
>
> Steve


-- 
Best Regards
Masahiro Yamada