Re: [linux-next:master 15112/15174] drivers/rtc/rtc-ds1307.c:1717:35: error: call to undeclared function 'i2c_client_get_device_id'; ISO C99 and later do not support implicit function declarations

["Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>]

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Hello Alexandre,

On Thu, Dec 15, 2022 at 01:31:15PM +0800, kernel test robot wrote:
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
> head:   459c73db4069c27c1d4a0e20d055b837396364b8
> commit: ad6d474d82dfb346573146d1bb0d818a720314fd [15112/15174] rtc: ds1307: Convert to i2c's .probe_new()
> config: hexagon-buildonly-randconfig-r004-20221214
> compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project 98b13979fb05f3ed288a900deb843e7b27589e58)
> reproduce (this is a W=1 build):
>         wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=ad6d474d82dfb346573146d1bb0d818a720314fd
>         git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
>         git fetch --no-tags linux-next master
>         git checkout ad6d474d82dfb346573146d1bb0d818a720314fd
>         # save the config file
>         mkdir build_dir && cp config build_dir/.config
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash drivers/rtc/
> 
> If you fix the issue, kindly add following tag where applicable
> | Reported-by: kernel test robot <lkp@intel.com>
> 
> Note: the linux-next/master HEAD 459c73db4069c27c1d4a0e20d055b837396364b8 builds fine.
>       It may have been fixed somewhere.

This is fixed by commit 662233731d66 ("i2c: core: Introduce
i2c_client_get_device_id helper function") which should be an ancestor
of the blamed commit.

FTR: This is currently the only commit with this problem (i.e. a new
user of i2c_client_get_device_id that isn't an ancestor of
662233731d66):

	$ git log --pretty=oneline --abbrev-commit --ancestry-path 662233731d66..next/master > l
	$ git log --pretty=oneline --abbrev-commit linus/master..next/master -Si2c_client_get_device_id | grep -F -x -v -f l
	ad6d474d82df rtc: ds1307: Convert to i2c's .probe_new()

(If someone knows a single command to get this information, let me
know.)

The idea was to pull

	https://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux.git i2c/client_device_id_helper-immutable

before applying the patch.

Best regards
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | https://www.pengutronix.de/ |

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