[mmotm:master 161/276] kernel/extable.c:174: undefined reference to `__start_ro_after_init'

[mmotm:master 161/276] kernel/extable.c:174: undefined reference to `__start_ro_after_init'

[kbuild test robot]

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tree:   git://git.cmpxchg.org/linux-mmotm.git master
head:   5b220005fda0593464fc4549eea586e597bf783c
commit: 7c61156608a0054d57061bd154b1ac537c49e0a8 [161/276] extable: verify address is read-only
config: arm-efm32_defconfig (attached as .config)
compiler: arm-linux-gnueabi-gcc (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
        wget https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout 7c61156608a0054d57061bd154b1ac537c49e0a8
        # save the attached .config to linux build tree
        make.cross ARCH=arm 

All errors (new ones prefixed by >>):

   kernel/built-in.o: In function `core_kernel_rodata':
>> kernel/extable.c:174: undefined reference to `__start_ro_after_init'
>> kernel/extable.c:174: undefined reference to `__end_ro_after_init'

vim +174 kernel/extable.c

   168	
   169		if (addr >= (unsigned long)__start_ro_after_init &&
   170		    addr < (unsigned long)__end_ro_after_init)
   171			return 1;
   172	
   173		return 0;
 > 174	}
   175	
   176	/* Verify that address is const or ro_after_init. */
   177	int kernel_ro_address(unsigned long addr)

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

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Re: [mmotm:master 161/276] kernel/extable.c:174: undefined reference to `__start_ro_after_init'

[Andrew Morton]

On Sat, 8 Apr 2017 10:37:22 +0800 kbuild test robot <fengguang.wu@intel.com> wrote:

> tree:   git://git.cmpxchg.org/linux-mmotm.git master
> head:   5b220005fda0593464fc4549eea586e597bf783c
> commit: 7c61156608a0054d57061bd154b1ac537c49e0a8 [161/276] extable: verify address is read-only
> config: arm-efm32_defconfig (attached as .config)
> compiler: arm-linux-gnueabi-gcc (Debian 6.1.1-9) 6.1.1 20160705
> reproduce:
>         wget https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         git checkout 7c61156608a0054d57061bd154b1ac537c49e0a8
>         # save the attached .config to linux build tree
>         make.cross ARCH=arm 
> 
> All errors (new ones prefixed by >>):
> 
>    kernel/built-in.o: In function `core_kernel_rodata':
> >> kernel/extable.c:174: undefined reference to `__start_ro_after_init'
> >> kernel/extable.c:174: undefined reference to `__end_ro_after_init'

Thanks, I dropped the patch.  And its companion
module-verify-address-is-read-only.patch to keep things tidy.

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Re: [mmotm:master 161/276] kernel/extable.c:174: undefined reference to `__start_ro_after_init'

[Stephen Rothwell]

Hi Andrew,

On Mon, 10 Apr 2017 14:09:55 -0700 Andrew Morton <akpm@linux-foundation.org> wrote:
>
> On Sat, 8 Apr 2017 10:37:22 +0800 kbuild test robot <fengguang.wu@intel.com> wrote:
> 
> > tree:   git://git.cmpxchg.org/linux-mmotm.git master
> > head:   5b220005fda0593464fc4549eea586e597bf783c
> > commit: 7c61156608a0054d57061bd154b1ac537c49e0a8 [161/276] extable: verify address is read-only
> > config: arm-efm32_defconfig (attached as .config)
> > compiler: arm-linux-gnueabi-gcc (Debian 6.1.1-9) 6.1.1 20160705
> > reproduce:
> >         wget https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
> >         chmod +x ~/bin/make.cross
> >         git checkout 7c61156608a0054d57061bd154b1ac537c49e0a8
> >         # save the attached .config to linux build tree
> >         make.cross ARCH=arm 
> > 
> > All errors (new ones prefixed by >>):
> > 
> >    kernel/built-in.o: In function `core_kernel_rodata':  
> > >> kernel/extable.c:174: undefined reference to `__start_ro_after_init'
> > >> kernel/extable.c:174: undefined reference to `__end_ro_after_init'  
> 
> Thanks, I dropped the patch.  And its companion
> module-verify-address-is-read-only.patch to keep things tidy.

Both removed from linux-next today.

-- 
Cheers,
Stephen Rothwell

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