Patch "powerpc/function_graph: Simplify with function_graph_enter()" has been added to the 4.19-stable tree

[kbuild test robot]

Hi gregkh,

I love your patch! Yet something to improve:

[auto build test ERROR on powerpc/next]
[cannot apply to v4.20-rc5 next-20181205]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/gregkh-linuxfoundation-org/Patch-powerpc-function_graph-Simplify-with-function_graph_enter-has-been-added-to-the-4-19-stable-tree/20181204-171923
base:   https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next
config: powerpc-defconfig (attached as .config)
compiler: powerpc64-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        GCC_VERSION=7.2.0 make.cross ARCH=powerpc 

All errors (new ones prefixed by >>):

   arch/powerpc/kernel/trace/ftrace.c: In function 'prepare_ftrace_return':
>> arch/powerpc/kernel/trace/ftrace.c:963:7: error: implicit declaration of function 'function_graph_enter'; did you mean 'ftrace_graph_entry'? [-Werror=implicit-function-declaration]
     if (!function_graph_enter(parent, ip, 0, NULL))
          ^~~~~~~~~~~~~~~~~~~~
          ftrace_graph_entry
   cc1: all warnings being treated as errors

vim +963 arch/powerpc/kernel/trace/ftrace.c

   946	
   947	/*
   948	 * Hook the return address and push it in the stack of return addrs
   949	 * in current thread info. Return the address we want to divert to.
   950	 */
   951	unsigned long prepare_ftrace_return(unsigned long parent, unsigned long ip)
   952	{
   953		unsigned long return_hooker;
   954	
   955		if (unlikely(ftrace_graph_is_dead()))
   956			goto out;
   957	
   958		if (unlikely(atomic_read(&current->tracing_graph_pause)))
   959			goto out;
   960	
   961		return_hooker = ppc_function_entry(return_to_handler);
   962	
 > 963		if (!function_graph_enter(parent, ip, 0, NULL))
   964			parent = return_hooker;
   965	out:
   966		return parent;
   967	}
   968	#endif /* CONFIG_FUNCTION_GRAPH_TRACER */
   969	

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation
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