Re: [PATCH v5 13/20] perf: stm32: introduce DDRPERFM driver

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

Hi Clément,

kernel test robot noticed the following build errors:

[auto build test ERROR on 89be9a83ccf1f88522317ce02f854f30d6115c41]

url:    https://github.com/intel-lab-lkp/linux/commits/Cl-ment-Le-Goffic/bus-firewall-move-stm32_firewall-header-file-in-include-folder/20250728-234144
base:   89be9a83ccf1f88522317ce02f854f30d6115c41
patch link:    https://lore.kernel.org/r/20250728-ddrperfm-upstream-v5-13-03f1be8ad396%40foss.st.com
patch subject: [PATCH v5 13/20] perf: stm32: introduce DDRPERFM driver
config: s390-randconfig-001-20250730 (https://download.01.org/0day-ci/archive/20250730/202507302237.gyVCBmXs-lkp@intel.com/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250730/202507302237.gyVCBmXs-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/202507302237.gyVCBmXs-lkp@intel.com/

All errors (new ones prefixed by >>):

>> drivers/perf/stm32_ddr_pmu.c:213:2: error: call to undeclared function 'writel_relaxed'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     213 |         writel_relaxed(r->start.mask, pmu->membase + r->start.reg);
         |         ^
   drivers/perf/stm32_ddr_pmu.c:220:2: error: call to undeclared function 'writel_relaxed'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     220 |         writel_relaxed(r->stop.mask, pmu->membase + r->stop.reg);
         |         ^
   drivers/perf/stm32_ddr_pmu.c:227:2: error: call to undeclared function 'writel_relaxed'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     227 |         writel_relaxed(r->clear_time.mask, pmu->membase + r->clear_time.reg);
         |         ^
   drivers/perf/stm32_ddr_pmu.c:234:2: error: call to undeclared function 'writel_relaxed'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     234 |         writel_relaxed(r->clear_cnt.mask & BIT(counter->idx), pmu->membase + r->clear_cnt.reg);
         |         ^
>> drivers/perf/stm32_ddr_pmu.c:240:15: error: call to undeclared function 'readl_relaxed'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     240 |         u32 status = readl_relaxed(pmu->membase + r->status.reg);
         |                      ^
   drivers/perf/stm32_ddr_pmu.c:255:12: error: call to undeclared function 'readl_relaxed'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     255 |         u32 val = readl_relaxed(pmu->membase + r->enable.reg);
         |                   ^
   drivers/perf/stm32_ddr_pmu.c:258:2: error: call to undeclared function 'writel_relaxed'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     258 |         writel_relaxed(val, pmu->membase + r->enable.reg);
         |         ^
   drivers/perf/stm32_ddr_pmu.c:264:12: error: call to undeclared function 'readl_relaxed'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     264 |         u32 val = readl_relaxed(pmu->membase + r->enable.reg);
         |                   ^
   drivers/perf/stm32_ddr_pmu.c:267:2: error: call to undeclared function 'writel_relaxed'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     267 |         writel_relaxed(val, pmu->membase + r->enable.reg);
         |         ^
   drivers/perf/stm32_ddr_pmu.c:285:17: error: call to undeclared function 'readl_relaxed'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     285 |                 cnt_sel_val = readl_relaxed(pmu->membase + r->cfg.reg);
         |                               ^
   drivers/perf/stm32_ddr_pmu.c:288:3: error: call to undeclared function 'writel_relaxed'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     288 |                 writel_relaxed(cnt_sel_val, pmu->membase + r->cfg.reg);
         |                 ^
   drivers/perf/stm32_ddr_pmu.c:302:16: error: call to undeclared function 'readl_relaxed'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     302 |         cnt_sel_val = readl_relaxed(pmu->membase + cnt_sel_evt_reg);
         |                       ^
   drivers/perf/stm32_ddr_pmu.c:306:2: error: call to undeclared function 'writel_relaxed'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     306 |         writel_relaxed(cnt_sel_val, pmu->membase + cnt_sel_evt_reg);
         |         ^
   drivers/perf/stm32_ddr_pmu.c:428:9: error: call to undeclared function 'readl_relaxed'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     428 |                 val = readl_relaxed(pmu->membase + r->counter_evt[counter->idx].reg);
         |                       ^
   drivers/perf/stm32_ddr_pmu.c:778:3: error: call to undeclared function 'writel_relaxed'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     778 |                 writel_relaxed(pmu->dram_type, pmu->membase + pmu->cfg->regs->dram_inf.reg);
         |                 ^
   drivers/perf/stm32_ddr_pmu.c:803:2: error: call to undeclared function 'writel_relaxed'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     803 |         writel_relaxed(pmu->dram_type, pmu->membase + pmu->cfg->regs->dram_inf.reg);
         |         ^
   16 errors generated.


vim +/writel_relaxed +213 drivers/perf/stm32_ddr_pmu.c

   208	
   209	static void stm32_ddr_start_counters(struct stm32_ddr_pmu *pmu)
   210	{
   211		const struct stm32_ddr_pmu_regspec *r = pmu->cfg->regs;
   212	
 > 213		writel_relaxed(r->start.mask, pmu->membase + r->start.reg);
   214	}
   215	
   216	static void stm32_ddr_stop_counters(struct stm32_ddr_pmu *pmu)
   217	{
   218		const struct stm32_ddr_pmu_regspec *r = pmu->cfg->regs;
   219	
   220		writel_relaxed(r->stop.mask, pmu->membase + r->stop.reg);
   221	}
   222	
   223	static void stm32_ddr_clear_time_counter(struct stm32_ddr_pmu *pmu)
   224	{
   225		const struct stm32_ddr_pmu_regspec *r = pmu->cfg->regs;
   226	
   227		writel_relaxed(r->clear_time.mask, pmu->membase + r->clear_time.reg);
   228	}
   229	
   230	static void stm32_ddr_clear_event_counter(struct stm32_ddr_pmu *pmu, struct stm32_ddr_cnt *counter)
   231	{
   232		const struct stm32_ddr_pmu_regspec *r = pmu->cfg->regs;
   233	
   234		writel_relaxed(r->clear_cnt.mask & BIT(counter->idx), pmu->membase + r->clear_cnt.reg);
   235	}
   236	
   237	static void stm32_ddr_clear_counter(struct stm32_ddr_pmu *pmu, struct stm32_ddr_cnt *counter)
   238	{
   239		const struct stm32_ddr_pmu_regspec *r = pmu->cfg->regs;
 > 240		u32 status = readl_relaxed(pmu->membase + r->status.reg);
   241	
   242		if (counter->idx == pmu->cfg->time_cnt_idx)
   243			stm32_ddr_clear_time_counter(pmu);
   244		else
   245			stm32_ddr_clear_event_counter(pmu, counter);
   246	
   247		if (status & r->status.mask)
   248			dev_err(pmu->dev, "Failed to clear counter %i because the PMU is busy\n",
   249				counter->idx);
   250	}
   251	

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