Re: [PATCH v3 2/4] ftrace: Add support for function argument to graph tracer

[kernel test robot <lkp@intel.com>]

Hi Steven,

kernel test robot noticed the following build errors:

[auto build test ERROR on linus/master]
[also build test ERROR on v6.14-rc4 next-20250227]
[cannot apply to trace/for-next]
[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#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Steven-Rostedt/ftrace-Add-print_function_args/20250226-063252
base:   linus/master
patch link:    https://lore.kernel.org/r/20250225222653.724198940%40goodmis.org
patch subject: [PATCH v3 2/4] ftrace: Add support for function argument to graph tracer
config: arm-socfpga_defconfig (https://download.01.org/0day-ci/archive/20250227/202502272155.zS8WsTRz-lkp@intel.com/config)
compiler: arm-linux-gnueabi-gcc (GCC) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250227/202502272155.zS8WsTRz-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202502272155.zS8WsTRz-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from include/linux/ftrace.h:115,
                    from kernel/trace/trace_functions_graph.c:11:
   kernel/trace/trace_functions_graph.c: In function '__graph_entry':
>> include/linux/ftrace_regs.h:22:9: error: implicit declaration of function 'regs_get_kernel_argument'; did you mean 'regs_get_kernel_stack_nth'? [-Wimplicit-function-declaration]
      22 |         regs_get_kernel_argument(&arch_ftrace_regs(fregs)->regs, n)
         |         ^~~~~~~~~~~~~~~~~~~~~~~~
   kernel/trace/trace_functions_graph.c:137:42: note: in expansion of macro 'ftrace_regs_get_argument'
     137 |                         entry->args[i] = ftrace_regs_get_argument(fregs, i);
         |                                          ^~~~~~~~~~~~~~~~~~~~~~~~
   kernel/trace/trace_functions_graph.c: In function 'print_graph_entry_leaf':
   kernel/trace/trace_functions_graph.c:901:23: warning: variable 'func' set but not used [-Wunused-but-set-variable]
     901 |         unsigned long func;
         |                       ^~~~


vim +22 include/linux/ftrace_regs.h

e4cf33ca48128d Steven Rostedt            2024-10-10  18  
e4cf33ca48128d Steven Rostedt            2024-10-10  19  #define ftrace_regs_get_instruction_pointer(fregs) \
0b582611a8f427 Masami Hiramatsu (Google  2024-10-15  20) 	instruction_pointer(&arch_ftrace_regs(fregs)->regs)
e4cf33ca48128d Steven Rostedt            2024-10-10  21  #define ftrace_regs_get_argument(fregs, n) \
0b582611a8f427 Masami Hiramatsu (Google  2024-10-15 @22) 	regs_get_kernel_argument(&arch_ftrace_regs(fregs)->regs, n)
e4cf33ca48128d Steven Rostedt            2024-10-10  23  #define ftrace_regs_get_stack_pointer(fregs) \
0b582611a8f427 Masami Hiramatsu (Google  2024-10-15  24) 	kernel_stack_pointer(&arch_ftrace_regs(fregs)->regs)
2d17932da44fdc Masami Hiramatsu (Google  2024-10-15  25) #define ftrace_regs_get_return_value(fregs) \
0b582611a8f427 Masami Hiramatsu (Google  2024-10-15  26) 	regs_return_value(&arch_ftrace_regs(fregs)->regs)
e4cf33ca48128d Steven Rostedt            2024-10-10  27  #define ftrace_regs_set_return_value(fregs, ret) \
0b582611a8f427 Masami Hiramatsu (Google  2024-10-15  28) 	regs_set_return_value(&arch_ftrace_regs(fregs)->regs, ret)
e4cf33ca48128d Steven Rostedt            2024-10-10  29  #define ftrace_override_function_with_return(fregs) \
0b582611a8f427 Masami Hiramatsu (Google  2024-10-15  30) 	override_function_with_return(&arch_ftrace_regs(fregs)->regs)
e4cf33ca48128d Steven Rostedt            2024-10-10  31  #define ftrace_regs_query_register_offset(name) \
e4cf33ca48128d Steven Rostedt            2024-10-10  32  	regs_query_register_offset(name)
a3ed4157b7d898 Masami Hiramatsu (Google  2024-12-26  33) #define ftrace_regs_get_frame_pointer(fregs) \
a3ed4157b7d898 Masami Hiramatsu (Google  2024-12-26  34) 	frame_pointer(&arch_ftrace_regs(fregs)->regs)
e4cf33ca48128d Steven Rostedt            2024-10-10  35  

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