[wsa:i2c/for-4.13 15/51] warning: __mcount_loc already exists: drivers/i2c/algos/i2c-algo-bit.o

[wsa:i2c/for-4.13 15/51] warning: __mcount_loc already exists: drivers/i2c/algos/i2c-algo-bit.o

[kbuild test robot]

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux.git i2c/for-4.13
head:   8f1a357d41a22009150cf404b5aa5876efdb59b1
commit: d44005672d83f89d7d797efc490a751a696e7d91 [15/51] i2c: stub: fix build warning regression
config: i386-allmodconfig (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
        git checkout d44005672d83f89d7d797efc490a751a696e7d91
        # save the attached .config to linux build tree
        make ARCH=i386 

All warnings (new ones prefixed by >>):

>> warning: __mcount_loc already exists: drivers/i2c/algos/i2c-algo-bit.o
--
>> warning: __mcount_loc already exists: drivers/i2c/busses/i2c-emev2.o
--
>> warning: __mcount_loc already exists: drivers/i2c/busses/i2c-xlp9xx.o
--
>> warning: __mcount_loc already exists: drivers/i2c/busses/i2c-rcar.o

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

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Re: [wsa:i2c/for-4.13 15/51] warning: __mcount_loc already exists: drivers/i2c/algos/i2c-algo-bit.o

[Wolfram Sang]

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On Tue, Jul 11, 2017 at 12:16:34PM +0800, kbuild test robot wrote:
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux.git i2c/for-4.13
> head:   8f1a357d41a22009150cf404b5aa5876efdb59b1
> commit: d44005672d83f89d7d797efc490a751a696e7d91 [15/51] i2c: stub: fix build warning regression
> config: i386-allmodconfig (attached as .config)
> compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
> reproduce:
>         git checkout d44005672d83f89d7d797efc490a751a696e7d91
>         # save the attached .config to linux build tree
>         make ARCH=i386 
> 
> All warnings (new ones prefixed by >>):
> 
> >> warning: __mcount_loc already exists: drivers/i2c/algos/i2c-algo-bit.o
> --
> >> warning: __mcount_loc already exists: drivers/i2c/busses/i2c-emev2.o
> --
> >> warning: __mcount_loc already exists: drivers/i2c/busses/i2c-xlp9xx.o
> --
> >> warning: __mcount_loc already exists: drivers/i2c/busses/i2c-rcar.o

False positive? How can a commit that only touches the DEBUG define in
i2c-algo-bit have effects on the latter three drivers?


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Re: [kbuild-all] [wsa:i2c/for-4.13 15/51] warning: __mcount_loc already exists: drivers/i2c/algos/i2c-algo-bit.o

[Fengguang Wu]

Hi Wolfram,

On Tue, Jul 11, 2017 at 08:54:31AM +0200, Wolfram Sang wrote:
>On Tue, Jul 11, 2017 at 12:16:34PM +0800, kbuild test robot wrote:
>> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux.git i2c/for-4.13
>> head:   8f1a357d41a22009150cf404b5aa5876efdb59b1
>> commit: d44005672d83f89d7d797efc490a751a696e7d91 [15/51] i2c: stub: fix build warning regression
>> config: i386-allmodconfig (attached as .config)
>> compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
>> reproduce:
>>         git checkout d44005672d83f89d7d797efc490a751a696e7d91
>>         # save the attached .config to linux build tree
>>         make ARCH=i386
>>
>> All warnings (new ones prefixed by >>):
>>
>> >> warning: __mcount_loc already exists: drivers/i2c/algos/i2c-algo-bit.o
>> --
>> >> warning: __mcount_loc already exists: drivers/i2c/busses/i2c-emev2.o
>> --
>> >> warning: __mcount_loc already exists: drivers/i2c/busses/i2c-xlp9xx.o
>> --
>> >> warning: __mcount_loc already exists: drivers/i2c/busses/i2c-rcar.o
>
>False positive? How can a commit that only touches the DEBUG define in
>i2c-algo-bit have effects on the latter three drivers?

You are right, I just confirmed that it's a false positive.

The bisect didn't run distclean, which may explain the warnings on
duplicate __mcount_loc.

Cheers,
Fengguang

Re: [kbuild-all] [wsa:i2c/for-4.13 15/51] warning: __mcount_loc already exists: drivers/i2c/algos/i2c-algo-bit.o

[Wolfram Sang]

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> >>All warnings (new ones prefixed by >>):
> >>
> >>>> warning: __mcount_loc already exists: drivers/i2c/algos/i2c-algo-bit.o
> >>--
> >>>> warning: __mcount_loc already exists: drivers/i2c/busses/i2c-emev2.o
> >>--
> >>>> warning: __mcount_loc already exists: drivers/i2c/busses/i2c-xlp9xx.o
> >>--
> >>>> warning: __mcount_loc already exists: drivers/i2c/busses/i2c-rcar.o
> >
> >False positive? How can a commit that only touches the DEBUG define in
> >i2c-algo-bit have effects on the latter three drivers?
> 
> You are right, I just confirmed that it's a false positive.
> 
> The bisect didn't run distclean, which may explain the warnings on
> duplicate __mcount_loc.

Cool. Thanks for the heads up!


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