Re: [PATCH 5/5] watchdog: rzn1: Add support for direct hardware reset

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

Hi Herve,

kernel test robot noticed the following build errors:

[auto build test ERROR on robh/for-next]
[also build test ERROR on geert-renesas-drivers/renesas-clk geert-renesas-devel/next groeck-staging/hwmon-next linus/master v7.0-rc3 next-20260310]
[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/Herve-Codina-Schneider-Electric/watchdog-rzn1-Fix-reverse-xmas-tree-declaration/20260311-015157
base:   https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next
patch link:    https://lore.kernel.org/r/20260310173249.161354-6-herve.codina%40bootlin.com
patch subject: [PATCH 5/5] watchdog: rzn1: Add support for direct hardware reset
config: arm-randconfig-002-20260311 (https://download.01.org/0day-ci/archive/20260311/202603111012.xhKbu8oc-lkp@intel.com/config)
compiler: arm-linux-gnueabi-gcc (GCC) 8.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260311/202603111012.xhKbu8oc-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/202603111012.xhKbu8oc-lkp@intel.com/

All error/warnings (new ones prefixed by >>):

   In file included from drivers/watchdog/rzn1_wdt.c:20:
>> include/linux/soc/renesas/r9a06g032-sysctrl.h:17:53: warning: 'enum r9a06g032_sysctrl_rst_src' declared inside parameter list will not be visible outside of this definition or declaration
    static inline int r9a06g032_sysctrl_enable_rst(enum r9a06g032_sysctrl_rst_src rst_src)
                                                        ^~~~~~~~~~~~~~~~~~~~~~~~~
>> include/linux/soc/renesas/r9a06g032-sysctrl.h:17:79: error: parameter 1 ('rst_src') has incomplete type
    static inline int r9a06g032_sysctrl_enable_rst(enum r9a06g032_sysctrl_rst_src rst_src)
                                                   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~
>> include/linux/soc/renesas/r9a06g032-sysctrl.h:17:19: error: function declaration isn't a prototype [-Werror=strict-prototypes]
    static inline int r9a06g032_sysctrl_enable_rst(enum r9a06g032_sysctrl_rst_src rst_src)
                      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/watchdog/rzn1_wdt.c: In function 'rzn1_wdt_setup_rst_line':
>> drivers/watchdog/rzn1_wdt.c:105:33: error: storage size of 'rst_src' isn't known
     enum r9a06g032_sysctrl_rst_src rst_src;
                                    ^~~~~~~
>> drivers/watchdog/rzn1_wdt.c:119:13: error: 'R9A06G032_RST_WATCHDOG_CA7_0' undeclared (first use in this function)
      rst_src = R9A06G032_RST_WATCHDOG_CA7_0;
                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/watchdog/rzn1_wdt.c:119:13: note: each undeclared identifier is reported only once for each function it appears in
>> drivers/watchdog/rzn1_wdt.c:122:13: error: 'R9A06G032_RST_WATCHDOG_CA7_1' undeclared (first use in this function)
      rst_src = R9A06G032_RST_WATCHDOG_CA7_1;
                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/watchdog/rzn1_wdt.c:105:33: warning: unused variable 'rst_src' [-Wunused-variable]
     enum r9a06g032_sysctrl_rst_src rst_src;
                                    ^~~~~~~
   cc1: some warnings being treated as errors


vim +17 include/linux/soc/renesas/r9a06g032-sysctrl.h

21c34edbcc67b03 Herve Codina (Schneider Electric  2026-03-10  14) 
885525c1e7e27ea Miquel Raynal                     2022-04-27  15  #else
885525c1e7e27ea Miquel Raynal                     2022-04-27  16  static inline int r9a06g032_sysctrl_set_dmamux(u32 mask, u32 val) { return -ENODEV; }
21c34edbcc67b03 Herve Codina (Schneider Electric  2026-03-10 @17) static inline int r9a06g032_sysctrl_enable_rst(enum r9a06g032_sysctrl_rst_src rst_src)
21c34edbcc67b03 Herve Codina (Schneider Electric  2026-03-10  18) {
21c34edbcc67b03 Herve Codina (Schneider Electric  2026-03-10  19) 	return -ENODEV;
21c34edbcc67b03 Herve Codina (Schneider Electric  2026-03-10  20) }
885525c1e7e27ea Miquel Raynal                     2022-04-27  21  #endif
885525c1e7e27ea Miquel Raynal                     2022-04-27  22  

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