Re: [PATCH 1/2] kprobes: Allow architectures to override optinsn page allocation

[Masami Hiramatsu]

On Thu, 13 May 2021 03:04:51 +0800
kernel test robot <lkp@xxxxxxxxx> wrote:

> Hi Christophe,
> 
> I love your patch! Perhaps something to improve:
> 
> [auto build test WARNING on powerpc/next]
> [also build test WARNING on linus/master v5.13-rc1 next-20210512]
> [If your patch is applied to the wrong git tree, kindly drop us a note.
> And when submitting patch, we suggest to use '--base' as documented in
> https://git-scm.com/docs/git-format-patch]
> 
> url:    https://github.com/0day-ci/linux/commits/Christophe-Leroy/kprobes-Allow-architectures-to-override-optinsn-page-allocation/20210512-223121
> base:   https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next
> config: i386-randconfig-r012-20210512 (attached as .config)
> compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
> reproduce (this is a W=1 build):
>         # https://github.com/0day-ci/linux/commit/2a1f135a9ce3c4d86d3bdefed561aa17760f430f
>         git remote add linux-review https://github.com/0day-ci/linux
>         git fetch --no-tags linux-review Christophe-Leroy/kprobes-Allow-architectures-to-override-optinsn-page-allocation/20210512-223121
>         git checkout 2a1f135a9ce3c4d86d3bdefed561aa17760f430f
>         # save the attached .config to linux build tree
>         make W=1 W=1 ARCH=i386 
> 
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@xxxxxxxxx>
> 
> All warnings (new ones prefixed by >>):
> 
> >> kernel/kprobes.c:324:14: warning: no previous prototype for 'alloc_optinsn_page' [-Wmissing-prototypes]
>      324 | void __weak *alloc_optinsn_page(void)
>          |              ^~~~~~~~~~~~~~~~~~
> >> kernel/kprobes.c:329:13: warning: no previous prototype for 'free_optinsn_page' [-Wmissing-prototypes]
>      329 | void __weak free_optinsn_page(void *page)
>          |             ^~~~~~~~~~~~~~~~~

Ah, we need a prototype for those in include/linux/kprobes.h
as same as alloc_insn_page() and free_insn_page().

Thank you,

-- 
Masami Hiramatsu <mhiramat@xxxxxxxxxx>