[vfs:asm-exports 6/6] ERROR: "__raw_readsb" [drivers/ata/pata_pcmcia.ko] undefined!

[vfs:asm-exports 6/6] ERROR: "__raw_readsb" [drivers/ata/pata_pcmcia.ko] undefined!

[kbuild test robot]

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git asm-exports
head:   5719a6be97e89c65e2b432b45850100c96c7419a
commit: 5719a6be97e89c65e2b432b45850100c96c7419a [6/6] arm: move exports to definitions
config: arm-viper_defconfig (attached as .config)
reproduce:
        wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout 5719a6be97e89c65e2b432b45850100c96c7419a
        # save the attached .config to linux build tree
        make.cross ARCH=arm 

All errors (new ones prefixed by >>):

>> ERROR: "__raw_readsb" [drivers/ata/pata_pcmcia.ko] undefined!
>> ERROR: "__raw_writesb" [drivers/ata/pata_pcmcia.ko] undefined!

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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Re: [vfs:asm-exports 6/6] ERROR: "__raw_readsb" [drivers/ata/pata_pcmcia.ko] undefined!

[Al Viro]

On Thu, Jan 14, 2016 at 10:50:12AM +0800, kbuild test robot wrote:
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git asm-exports
> head:   5719a6be97e89c65e2b432b45850100c96c7419a
> commit: 5719a6be97e89c65e2b432b45850100c96c7419a [6/6] arm: move exports to definitions
> config: arm-viper_defconfig (attached as .config)
> reproduce:
>         wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         git checkout 5719a6be97e89c65e2b432b45850100c96c7419a
>         # save the attached .config to linux build tree
>         make.cross ARCH=arm 
> 
> All errors (new ones prefixed by >>):
> 
> >> ERROR: "__raw_readsb" [drivers/ata/pata_pcmcia.ko] undefined!
> >> ERROR: "__raw_writesb" [drivers/ata/pata_pcmcia.ko] undefined!

Arrgh...  OK, I see what's going on - export in a lib-y object.  For lib/*.c
we deal with that by putting such objects into obj-y; the same certainly
can be done for *.S, but I wonder if a better solution would be to have
lib-y objects scanned for __ksymtab_strings section (grepping in objdump -h
output) and treat the ones that have such as obj-y.

Comments?