Re: [PATCH v2 1/5] printk/nmi: Generic solution for safe printk in NMI

[Petr Mladek]

On Fri 2015-11-27 19:49:48, kbuild test robot wrote:
> Hi Petr,
> 
> [auto build test WARNING on powerpc/next]
> [also build test WARNING on v4.4-rc2 next-20151127]
> [cannot apply to tip/x86/core]
> 
> url:    https://github.com/0day-ci/linux/commits/Petr-Mladek/Cleaning-printk-stuff-in-NMI-context/20151127-191620
> base:   https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next
> config: mn10300-asb2364_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
>         # save the attached .config to linux build tree
>         make.cross ARCH=mn10300 
> 
> All warnings (new ones prefixed by >>):
> 
> warning: (MN10300) selects HAVE_NMI_WATCHDOG which has unmet direct dependencies (HAVE_NMI)

MN10300 has its own implementation for entering and exiting NMI
handlers. It does not call nmi_enter() and nmi_exit().
Please, find below an updated patch that adds printk_nmi_enter()
and printk_nmi_exit() to the custom entry points.
Then we could add HAVE_NMI to arch/mn10300/Kconfig and avoid
the above warning.

The updated patch also fixes includes in kernel/printk/nmi.c
and kernel/printk/printk.h to fix the other build errors
found by kbuild test robot.

The kbuild test robot is really cool thing!