Re: [PATCH v2] clk: Provide notifier stubs when !COMMON_CLK

[Bartlomiej Zolnierkiewicz]

Hi,

On Tuesday, June 28, 2016 01:25:04 PM Krzysztof Kozlowski wrote:
> The clk notifier symbols are hidden by COMMON_CLK.  However on some
> platforms HAVE_CLK might be set while COMMON_CLK not which leads to
> compile test build errors like:
> 
> $ make.cross ARCH=sh
>    drivers/devfreq/tegra-devfreq.c: In function 'tegra_actmon_rate_notify_cb':
> >> drivers/devfreq/tegra-devfreq.c:391:16: error: 'POST_RATE_CHANGE' undeclared (first use in this function)
>      if (action != POST_RATE_CHANGE)
>                    ^
>    drivers/devfreq/tegra-devfreq.c: In function 'tegra_devfreq_probe':
> >> drivers/devfreq/tegra-devfreq.c:654:8: error: implicit declaration of function 'clk_notifier_register' [-Werror=implicit-function-declaration]
>      err = clk_notifier_register(tegra->emc_clock, &tegra->rate_change_nb);
>            ^
> 
> Export the macros and data type declarations outside of COMMON_CLK ifdef
> and provide stubs to fix the compile testing.
> 
> Reported-by: kbuild test robot <lkp@xxxxxxxxx>
> Signed-off-by: Krzysztof Kozlowski <k.kozlowski@xxxxxxxxxxx>
> 
> ---
> 
> Reported when testing patch [1] on ARCH=sh. I don't have the sh cross
> compile toolchain so I cannot verify whether this fixes reported issue.

FWIW I've verified with sh cross-compiler.

Tested-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@xxxxxxxxxxx>

> Tested on similar configuration on MIPS (HAVE_CLK && !COMMON_CLK)
> 
> [1] http://www.gossamer-threads.com/lists/linux/kernel/2471798

Best regards,
--
Bartlomiej Zolnierkiewicz
Samsung R&D Institute Poland
Samsung Electronics