linux-kernel - [ammarfaizi2-block:google/android/kernel/common/android-4.14-q-release 2605/9999] kernel/trace/ftrace.c:6567:6: warning: no previous declaration for 'ftrace_graph_return

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Date:   Thu, 3 Mar 2022 12:03:35 +0800
From:   kernel test robot <lkp@...el.com>
To:     Sami Tolvanen <samitolvanen@...gle.com>
Cc:     kbuild-all@...ts.01.org,
        GNU/Weeb Mailing List <gwml@...r.gnuweeb.org>,
        linux-kernel@...r.kernel.org
Subject: [ammarfaizi2-block:google/android/kernel/common/android-4.14-q-release
 2605/9999] kernel/trace/ftrace.c:6567:6: warning: no previous declaration
 for 'ftrace_graph_return_stub'

Hi Sami,

FYI, the error/warning still remains.

tree:   https://github.com/ammarfaizi2/linux-block google/android/kernel/common/android-4.14-q-release
head:   10b2283595d8504436650acaacae25859eb24bdc
commit: 03002d0374dd37a1969c6c3aa5e16ffe9844af24 [2605/9999] ANDROID: ftrace: fix function type mismatches
config: i386-randconfig-r024-20211019 (https://download.01.org/0day-ci/archive/20220303/202203031139.31glDHLy-lkp@intel.com/config)
compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0
reproduce (this is a W=1 build):
        # https://github.com/ammarfaizi2/linux-block/commit/03002d0374dd37a1969c6c3aa5e16ffe9844af24
        git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block
        git fetch --no-tags ammarfaizi2-block google/android/kernel/common/android-4.14-q-release
        git checkout 03002d0374dd37a1969c6c3aa5e16ffe9844af24
        # save the config file to linux build tree
        mkdir build_dir
        make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash kernel/trace/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>

All warnings (new ones prefixed by >>):

   kernel/trace/ftrace.c:2727:13: warning: no previous declaration for 'arch_ftrace_trampoline_free' [-Wmissing-declarations]
    void __weak arch_ftrace_trampoline_free(struct ftrace_ops *ops)
                ^~~~~~~~~~~~~~~~~~~~~~~~~~~
   kernel/trace/ftrace.c:3488:1: warning: no previous declaration for 'arch_ftrace_trampoline_func' [-Wmissing-declarations]
    arch_ftrace_trampoline_func(struct ftrace_ops *ops, struct dyn_ftrace *rec)
    ^~~~~~~~~~~~~~~~~~~~~~~~~~~
   kernel/trace/ftrace.c:3726:15: warning: no previous declaration for 'arch_ftrace_match_adjust' [-Wmissing-declarations]
    char * __weak arch_ftrace_match_adjust(char *str, const char *search)
                  ^~~~~~~~~~~~~~~~~~~~~~~~
   kernel/trace/ftrace.c: In function 'process_mod_list':
   kernel/trace/ftrace.c:4008:6: warning: variable 'ret' set but not used [-Wunused-but-set-variable]
     int ret;
         ^~~
   kernel/trace/ftrace.c: In function 'ftrace_regex_release':
   kernel/trace/ftrace.c:5040:6: warning: variable 'ret' set but not used [-Wunused-but-set-variable]
     int ret;
         ^~~
   kernel/trace/ftrace.c: At top level:
   kernel/trace/ftrace.c:5949:13: warning: no previous declaration for 'arch_ftrace_update_trampoline' [-Wmissing-declarations]
    void __weak arch_ftrace_update_trampoline(struct ftrace_ops *ops)
                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> kernel/trace/ftrace.c:6567:6: warning: no previous declaration for 'ftrace_graph_return_stub' [-Wmissing-declarations]
    void ftrace_graph_return_stub(struct ftrace_graph_ret *trace)
         ^~~~~~~~~~~~~~~~~~~~~~~~
   kernel/trace/ftrace.c:6571:5: warning: no previous declaration for 'ftrace_graph_entry_stub' [-Wmissing-declarations]
    int ftrace_graph_entry_stub(struct ftrace_graph_ent *trace)
        ^~~~~~~~~~~~~~~~~~~~~~~
   kernel/trace/ftrace.c:1093:27: warning: 'ftrace_swapper_pid' defined but not used [-Wunused-const-variable=]
    static struct pid * const ftrace_swapper_pid = &init_struct_pid;
                              ^~~~~~~~~~~~~~~~~~


vim +/ftrace_graph_return_stub +6567 kernel/trace/ftrace.c

  6566	
> 6567	void ftrace_graph_return_stub(struct ftrace_graph_ret *trace)
  6568	{
  6569	}
  6570	

---
0-DAY CI Kernel Test Service, Intel Corporation
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