Re: [PATCH 06/13] perf: stm32: introduce DDRPERFM driver

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

Hi Clément,

kernel test robot noticed the following build warnings:

[auto build test WARNING on 86731a2a651e58953fc949573895f2fa6d456841]

url:    https://github.com/intel-lab-lkp/linux/commits/Cl-ment-Le-Goffic/bus-firewall-move-stm32_firewall-header-file-in-include-folder/20250623-173554
base:   86731a2a651e58953fc949573895f2fa6d456841
patch link:    https://lore.kernel.org/r/20250623-ddrperfm-upstream-v1-6-7dffff168090%40foss.st.com
patch subject: [PATCH 06/13] perf: stm32: introduce DDRPERFM driver
config: i386-buildonly-randconfig-004-20250627 (https://download.01.org/0day-ci/archive/20250627/202506270708.6w6phhmi-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250627/202506270708.6w6phhmi-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/202506270708.6w6phhmi-lkp@intel.com/

All warnings (new ones prefixed by >>):

   drivers/perf/stm32_ddr_pmu.c: In function 'stm32_ddr_start_counters':
   drivers/perf/stm32_ddr_pmu.c:205:9: error: implicit declaration of function 'writel_relaxed' [-Werror=implicit-function-declaration]
     205 |         writel_relaxed(r->start.mask, pmu->membase + r->start.reg);
         |         ^~~~~~~~~~~~~~
   drivers/perf/stm32_ddr_pmu.c: In function 'stm32_ddr_clear_counter':
   drivers/perf/stm32_ddr_pmu.c:232:22: error: implicit declaration of function 'readl_relaxed' [-Werror=implicit-function-declaration]
     232 |         u32 status = readl_relaxed(pmu->membase + r->status.reg);
         |                      ^~~~~~~~~~~~~
   drivers/perf/stm32_ddr_pmu.c: At top level:
>> drivers/perf/stm32_ddr_pmu.c:862:34: warning: 'stm32_ddr_pmu_of_match' defined but not used [-Wunused-const-variable=]
     862 | static const struct of_device_id stm32_ddr_pmu_of_match[] = {
         |                                  ^~~~~~~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors


vim +/stm32_ddr_pmu_of_match +862 drivers/perf/stm32_ddr_pmu.c

   861	
 > 862	static const struct of_device_id stm32_ddr_pmu_of_match[] = {
   863		{
   864			.compatible = "st,stm32mp131-ddr-pmu",
   865			.data = &stm32_ddr_pmu_cfg_mp1
   866		},
   867		{
   868			.compatible = "st,stm32mp151-ddr-pmu",
   869			.data = &stm32_ddr_pmu_cfg_mp1
   870		},
   871		{
   872			.compatible = "st,stm32mp251-ddr-pmu",
   873			.data = &stm32_ddr_pmu_cfg_mp2
   874		},
   875		{ },
   876	};
   877	MODULE_DEVICE_TABLE(of, stm32_ddr_pmu_of_match);
   878	

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