Re: [rostedt-trace:for-next 58/100] samples/ftrace/ftrace-direct-multi.c:8:6: warning: no previous prototype for function 'my_direct_func'

Jiri Olsa
2021-11-01T13:37:16Z

On Mon, Nov 01, 2021 at 05:46:26AM +0800, kernel test robot wrote:
> tree: https://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace.git for-next
> head: 93d76e4a0e0112b320c4f0e2a3930ad634628c58
> commit: 5fae941b9a6f95773df644e7cf304bf199707876 [58/100] ftrace/samples: Add multi direct interface test module
> config: x86_64-randconfig-r024-20211031 (attached as .config)
> compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 82ed106567063ea269c6d5669278b733e173a42f)
> 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/rostedt/linux-trace.git/commit/?id=5fae941b9a6f95773df644e7cf304bf199707876
> git remote add rostedt-trace https://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace.git
> git fetch --no-tags rostedt-trace for-next
> git checkout 5fae941b9a6f95773df644e7cf304bf199707876
> # save the attached .config to linux build tree
> COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=x86_64
>
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@intel.com>
>
> All warnings (new ones prefixed by >>):
>
> >> samples/ftrace/ftrace-direct-multi.c:8:6: warning: no previous prototype for function 'my_direct_func' [-Wmissing-prototypes]
> void my_direct_func(unsigned long ip)
> ^
> samples/ftrace/ftrace-direct-multi.c:8:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
> void my_direct_func(unsigned long ip)

hum, that can actually be static.. I'll check

thanks,
jirka

> ^
> static
> 1 warning generated.
>
>
> vim +/my_direct_func +8 samples/ftrace/ftrace-direct-multi.c
>
> 7
> > 8 void my_direct_func(unsigned long ip)
> 9 {
> 10 trace_printk("ip %lx\n", ip);
> 11 }
> 12
>
> ---
> 0-DAY CI Kernel Test Service, Intel Corporation
> https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org