Hi Jason, First bad commit (maybe != root cause): tree: https://github.com/Freescale/linux-fslc pr/416 head: 915e71b823c877d351de1cbe650344ef6eace94b commit: 5bb09de3044acf91e6f8c712c026d5a4bc53b563 [15241/20667] MLK-24874-1: include: uapi: fmd: fix the UAPI_HEADER_TEST/install failure config: arm-allyesconfig (attached as .config) compiler: arm-linux-gnueabi-gcc (GCC) 11.2.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://github.com/Freescale/linux-fslc/commit/5bb09de3044acf91e6f8c712c0... git remote add freescale-fslc https://github.com/Freescale/linux-fslc git fetch --no-tags freescale-fslc pr/416 git checkout 5bb09de3044acf91e6f8c712c026d5a4bc53b563 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=arm If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): 108 | int update_freq_optee(int ddr_rate) | ^~~~~~~~~~~~~~~~~ 281 | int init_freq_optee(struct platform_device *busfreq_pdev) | ^~~~~~~~~~~~~~~ vim +/update_freq_optee +108 arch/arm/mach-imx/busfreq_optee.c 7c335a91f0f4c6a Cedric Neveux 2018-10-18 99 7c335a91f0f4c6a Cedric Neveux 2018-10-18 100 /** 7c335a91f0f4c6a Cedric Neveux 2018-10-18 101 * @brief Request OPTEE OS to change the memory bus frequency 7c335a91f0f4c6a Cedric Neveux 2018-10-18 102 * to \a ddr_rate value 7c335a91f0f4c6a Cedric Neveux 2018-10-18 103 * 7c335a91f0f4c6a Cedric Neveux 2018-10-18 104 * @param[in] rate Bus Frequency 7c335a91f0f4c6a Cedric Neveux 2018-10-18 105 * 7c335a91f0f4c6a Cedric Neveux 2018-10-18 106 * @retval 0 Success 7c335a91f0f4c6a Cedric Neveux 2018-10-18 107 */ 7c335a91f0f4c6a Cedric Neveux 2018-10-18 @108 int update_freq_optee(int ddr_rate) 7c335a91f0f4c6a Cedric Neveux 2018-10-18 109 { 7c335a91f0f4c6a Cedric Neveux 2018-10-18 110 struct arm_smccc_res res; 7c335a91f0f4c6a Cedric Neveux 2018-10-18 111 7c335a91f0f4c6a Cedric Neveux 2018-10-18 112 uint32_t me = 0; 7c335a91f0f4c6a Cedric Neveux 2018-10-18 113 uint32_t dll_off = 0; 7c335a91f0f4c6a Cedric Neveux 2018-10-18 114 int mode = get_bus_freq_mode(); 7c335a91f0f4c6a Cedric Neveux 2018-10-18 115 7c335a91f0f4c6a Cedric Neveux 2018-10-18 116 #ifdef CONFIG_SMP 7c335a91f0f4c6a Cedric Neveux 2018-10-18 117 uint32_t reg = 0; 7c335a91f0f4c6a Cedric Neveux 2018-10-18 118 uint32_t cpu = 0; 7c335a91f0f4c6a Cedric Neveux 2018-10-18 119 uint32_t online_cpus = 0; 7c335a91f0f4c6a Cedric Neveux 2018-10-18 120 uint32_t all_cpus = 0; 7c335a91f0f4c6a Cedric Neveux 2018-10-18 121 #endif 7c335a91f0f4c6a Cedric Neveux 2018-10-18 122 c2e58ab882a1953 Cedric Neveux 2018-11-16 123 pr_info("\nBusfreq OPTEE set from %d to %d start...\n", 7c335a91f0f4c6a Cedric Neveux 2018-10-18 124 curr_ddr_rate, ddr_rate); 7c335a91f0f4c6a Cedric Neveux 2018-10-18 125 7c335a91f0f4c6a Cedric Neveux 2018-10-18 126 if (ddr_rate == curr_ddr_rate) 7c335a91f0f4c6a Cedric Neveux 2018-10-18 127 return 0; 7c335a91f0f4c6a Cedric Neveux 2018-10-18 128 7c335a91f0f4c6a Cedric Neveux 2018-10-18 129 if (cpu_is_imx6()) { 7c335a91f0f4c6a Cedric Neveux 2018-10-18 130 if ((mode == BUS_FREQ_LOW) || (mode == BUS_FREQ_AUDIO)) 7c335a91f0f4c6a Cedric Neveux 2018-10-18 131 dll_off = 1; 7c335a91f0f4c6a Cedric Neveux 2018-10-18 132 } 7c335a91f0f4c6a Cedric Neveux 2018-10-18 133 7c335a91f0f4c6a Cedric Neveux 2018-10-18 134 local_irq_disable(); 7c335a91f0f4c6a Cedric Neveux 2018-10-18 135 7c335a91f0f4c6a Cedric Neveux 2018-10-18 136 #ifdef CONFIG_SMP 7c335a91f0f4c6a Cedric Neveux 2018-10-18 137 me = smp_processor_id(); 7c335a91f0f4c6a Cedric Neveux 2018-10-18 138 7c335a91f0f4c6a Cedric Neveux 2018-10-18 139 /* Make sure all the online cores to be active */ 7c335a91f0f4c6a Cedric Neveux 2018-10-18 140 do { 7c335a91f0f4c6a Cedric Neveux 2018-10-18 141 all_cpus = 0; 7c335a91f0f4c6a Cedric Neveux 2018-10-18 142 7c335a91f0f4c6a Cedric Neveux 2018-10-18 143 for_each_online_cpu(cpu) 7c335a91f0f4c6a Cedric Neveux 2018-10-18 144 all_cpus |= (pSync->wfe_status[cpu] << cpu); 7c335a91f0f4c6a Cedric Neveux 2018-10-18 145 } while (all_cpus); 7c335a91f0f4c6a Cedric Neveux 2018-10-18 146 7c335a91f0f4c6a Cedric Neveux 2018-10-18 147 pSync->change_ongoing = 1; 7c335a91f0f4c6a Cedric Neveux 2018-10-18 148 dsb(); 7c335a91f0f4c6a Cedric Neveux 2018-10-18 149 7c335a91f0f4c6a Cedric Neveux 2018-10-18 150 for_each_online_cpu(cpu) { 7c335a91f0f4c6a Cedric Neveux 2018-10-18 151 if (cpu != me) { 7c335a91f0f4c6a Cedric Neveux 2018-10-18 152 online_cpus |= (1 << cpu); 7c335a91f0f4c6a Cedric Neveux 2018-10-18 153 /* Set the interrupt to be pending in the GIC. */ 7c335a91f0f4c6a Cedric Neveux 2018-10-18 154 reg = 1 << (irqs_for_wfe[cpu] % 32); 7c335a91f0f4c6a Cedric Neveux 2018-10-18 155 writel_relaxed(reg, gic_dist_base + GIC_DIST_PENDING_SET 7c335a91f0f4c6a Cedric Neveux 2018-10-18 156 + (irqs_for_wfe[cpu] / 32) * 4); 7c335a91f0f4c6a Cedric Neveux 2018-10-18 157 } 7c335a91f0f4c6a Cedric Neveux 2018-10-18 158 } 7c335a91f0f4c6a Cedric Neveux 2018-10-18 159 7c335a91f0f4c6a Cedric Neveux 2018-10-18 160 /* Wait for all active CPUs to be in WFE */ 7c335a91f0f4c6a Cedric Neveux 2018-10-18 161 do { 7c335a91f0f4c6a Cedric Neveux 2018-10-18 162 all_cpus = 0; 7c335a91f0f4c6a Cedric Neveux 2018-10-18 163 7c335a91f0f4c6a Cedric Neveux 2018-10-18 164 for_each_online_cpu(cpu) 7c335a91f0f4c6a Cedric Neveux 2018-10-18 165 all_cpus |= (pSync->wfe_status[cpu] << cpu); 7c335a91f0f4c6a Cedric Neveux 2018-10-18 166 } while (all_cpus != online_cpus); 7c335a91f0f4c6a Cedric Neveux 2018-10-18 167 7c335a91f0f4c6a Cedric Neveux 2018-10-18 168 #endif 7c335a91f0f4c6a Cedric Neveux 2018-10-18 169 7c335a91f0f4c6a Cedric Neveux 2018-10-18 170 /* Now we can change the DDR frequency. */ 7c335a91f0f4c6a Cedric Neveux 2018-10-18 171 /* Call the TEE SiP */ 7c335a91f0f4c6a Cedric Neveux 2018-10-18 172 arm_smccc_smc(OPTEE_SMC_FAST_CALL_SIP_VAL(IMX_SIP_BUSFREQ_CHANGE), 7c335a91f0f4c6a Cedric Neveux 2018-10-18 173 ddr_rate, dll_off, 0, 0, 0, 0, 0, &res); 7c335a91f0f4c6a Cedric Neveux 2018-10-18 174 7c335a91f0f4c6a Cedric Neveux 2018-10-18 175 curr_ddr_rate = ddr_rate; 7c335a91f0f4c6a Cedric Neveux 2018-10-18 176 7c335a91f0f4c6a Cedric Neveux 2018-10-18 177 #ifdef CONFIG_SMP 7c335a91f0f4c6a Cedric Neveux 2018-10-18 178 /* DDR frequency change is done */ 7c335a91f0f4c6a Cedric Neveux 2018-10-18 179 pSync->change_ongoing = 0; 7c335a91f0f4c6a Cedric Neveux 2018-10-18 180 dsb(); 7c335a91f0f4c6a Cedric Neveux 2018-10-18 181 7c335a91f0f4c6a Cedric Neveux 2018-10-18 182 /* wake up all the cores. */ 7c335a91f0f4c6a Cedric Neveux 2018-10-18 183 sev(); 7c335a91f0f4c6a Cedric Neveux 2018-10-18 184 #endif 7c335a91f0f4c6a Cedric Neveux 2018-10-18 185 7c335a91f0f4c6a Cedric Neveux 2018-10-18 186 local_irq_enable(); 7c335a91f0f4c6a Cedric Neveux 2018-10-18 187 c2e58ab882a1953 Cedric Neveux 2018-11-16 188 pr_info("Busfreq OPTEE set to %d done! cpu=%d\n", c2e58ab882a1953 Cedric Neveux 2018-11-16 189 ddr_rate, me); 7c335a91f0f4c6a Cedric Neveux 2018-10-18 190 7c335a91f0f4c6a Cedric Neveux 2018-10-18 191 return 0; 7c335a91f0f4c6a Cedric Neveux 2018-10-18 192 } 7c335a91f0f4c6a Cedric Neveux 2018-10-18 193 2fc7c702e104bff Cedric Neveux 2018-11-22 194 #ifdef CONFIG_SMP 7c335a91f0f4c6a Cedric Neveux 2018-10-18 195 static int init_freq_optee_smp(struct platform_device *busfreq_pdev) 7c335a91f0f4c6a Cedric Neveux 2018-10-18 196 { 7c335a91f0f4c6a Cedric Neveux 2018-10-18 197 struct device_node *node = 0; 7c335a91f0f4c6a Cedric Neveux 2018-10-18 198 struct device *dev = &busfreq_pdev->dev; 7c335a91f0f4c6a Cedric Neveux 2018-10-18 199 uint32_t cpu; 7c335a91f0f4c6a Cedric Neveux 2018-10-18 200 int err; 7c335a91f0f4c6a Cedric Neveux 2018-10-18 201 int irq; 7c335a91f0f4c6a Cedric Neveux 2018-10-18 202 struct irq_data *irq_data; 7c335a91f0f4c6a Cedric Neveux 2018-10-18 203 unsigned long wfe_iram_base; 7c335a91f0f4c6a Cedric Neveux 2018-10-18 204 7c335a91f0f4c6a Cedric Neveux 2018-10-18 205 if (cpu_is_imx6()) { 7c335a91f0f4c6a Cedric Neveux 2018-10-18 206 node = of_find_compatible_node(NULL, NULL, "arm,cortex-a9-gic"); 7c335a91f0f4c6a Cedric Neveux 2018-10-18 207 if (!node) { 7c335a91f0f4c6a Cedric Neveux 2018-10-18 208 if (cpu_is_imx6q()) 7c335a91f0f4c6a Cedric Neveux 2018-10-18 209 pr_debug("failed to find imx6q-a9-gic device tree data!\n"); 7c335a91f0f4c6a Cedric Neveux 2018-10-18 210 7c335a91f0f4c6a Cedric Neveux 2018-10-18 211 return -EINVAL; 7c335a91f0f4c6a Cedric Neveux 2018-10-18 212 } 7c335a91f0f4c6a Cedric Neveux 2018-10-18 213 } else { 7c335a91f0f4c6a Cedric Neveux 2018-10-18 214 node = of_find_compatible_node(NULL, NULL, "arm,cortex-a7-gic"); 7c335a91f0f4c6a Cedric Neveux 2018-10-18 215 if (!node) { 7c335a91f0f4c6a Cedric Neveux 2018-10-18 216 pr_debug("failed to find imx7d-a7-gic device tree data!\n"); 7c335a91f0f4c6a Cedric Neveux 2018-10-18 217 return -EINVAL; 7c335a91f0f4c6a Cedric Neveux 2018-10-18 218 } 7c335a91f0f4c6a Cedric Neveux 2018-10-18 219 } 7c335a91f0f4c6a Cedric Neveux 2018-10-18 220 7c335a91f0f4c6a Cedric Neveux 2018-10-18 221 gic_dist_base = of_iomap(node, 0); 7c335a91f0f4c6a Cedric Neveux 2018-10-18 222 WARN(!gic_dist_base, "unable to map gic dist registers\n"); 7c335a91f0f4c6a Cedric Neveux 2018-10-18 223 7c335a91f0f4c6a Cedric Neveux 2018-10-18 224 irqs_for_wfe = devm_kzalloc(dev, sizeof(uint32_t) * num_present_cpus(), 7c335a91f0f4c6a Cedric Neveux 2018-10-18 225 GFP_KERNEL); 7c335a91f0f4c6a Cedric Neveux 2018-10-18 226 7c335a91f0f4c6a Cedric Neveux 2018-10-18 227 for_each_online_cpu(cpu) { 7c335a91f0f4c6a Cedric Neveux 2018-10-18 228 /* 7c335a91f0f4c6a Cedric Neveux 2018-10-18 229 * set up a reserved interrupt to get all 7c335a91f0f4c6a Cedric Neveux 2018-10-18 230 * the active cores into a WFE state 7c335a91f0f4c6a Cedric Neveux 2018-10-18 231 * before changing the DDR frequency. 7c335a91f0f4c6a Cedric Neveux 2018-10-18 232 */ 7c335a91f0f4c6a Cedric Neveux 2018-10-18 233 irq = platform_get_irq(busfreq_pdev, cpu); 7c335a91f0f4c6a Cedric Neveux 2018-10-18 234 7c335a91f0f4c6a Cedric Neveux 2018-10-18 235 if (cpu_is_imx6()) { 7c335a91f0f4c6a Cedric Neveux 2018-10-18 236 err = request_irq(irq, wait_in_wfe_irq, 7c335a91f0f4c6a Cedric Neveux 2018-10-18 237 IRQF_PERCPU, "mmdc_1", NULL); 7c335a91f0f4c6a Cedric Neveux 2018-10-18 238 } else { 7c335a91f0f4c6a Cedric Neveux 2018-10-18 239 err = request_irq(irq, wait_in_wfe_irq, 7c335a91f0f4c6a Cedric Neveux 2018-10-18 240 IRQF_PERCPU, "ddrc", NULL); 7c335a91f0f4c6a Cedric Neveux 2018-10-18 241 } 7c335a91f0f4c6a Cedric Neveux 2018-10-18 242 7c335a91f0f4c6a Cedric Neveux 2018-10-18 243 if (err) { 7c335a91f0f4c6a Cedric Neveux 2018-10-18 244 dev_err(dev, 7c335a91f0f4c6a Cedric Neveux 2018-10-18 245 "Busfreq:request_irq failed %d, err = %d\n", 7c335a91f0f4c6a Cedric Neveux 2018-10-18 246 irq, err); 7c335a91f0f4c6a Cedric Neveux 2018-10-18 247 return err; 7c335a91f0f4c6a Cedric Neveux 2018-10-18 248 } 7c335a91f0f4c6a Cedric Neveux 2018-10-18 249 7c335a91f0f4c6a Cedric Neveux 2018-10-18 250 err = irq_set_affinity(irq, cpumask_of(cpu)); 7c335a91f0f4c6a Cedric Neveux 2018-10-18 251 if (err) { 7c335a91f0f4c6a Cedric Neveux 2018-10-18 252 dev_err(dev, 7c335a91f0f4c6a Cedric Neveux 2018-10-18 253 "Busfreq: Cannot set irq affinity irq=%d,\n", 7c335a91f0f4c6a Cedric Neveux 2018-10-18 254 irq); 7c335a91f0f4c6a Cedric Neveux 2018-10-18 255 return err; 7c335a91f0f4c6a Cedric Neveux 2018-10-18 256 } 7c335a91f0f4c6a Cedric Neveux 2018-10-18 257 7c335a91f0f4c6a Cedric Neveux 2018-10-18 258 irq_data = irq_get_irq_data(irq); 7c335a91f0f4c6a Cedric Neveux 2018-10-18 259 irqs_for_wfe[cpu] = irq_data->hwirq + 32; 7c335a91f0f4c6a Cedric Neveux 2018-10-18 260 } 7c335a91f0f4c6a Cedric Neveux 2018-10-18 261 7c335a91f0f4c6a Cedric Neveux 2018-10-18 262 /* Store the variable used to communicate between cores */ 7c335a91f0f4c6a Cedric Neveux 2018-10-18 263 pSync = (void *)ddr_freq_change_iram_base; 7c335a91f0f4c6a Cedric Neveux 2018-10-18 264 7c335a91f0f4c6a Cedric Neveux 2018-10-18 265 memset(pSync, 0, sizeof(*pSync)); 7c335a91f0f4c6a Cedric Neveux 2018-10-18 266 7c335a91f0f4c6a Cedric Neveux 2018-10-18 267 wfe_iram_base = ddr_freq_change_iram_base + sizeof(*pSync); 7c335a91f0f4c6a Cedric Neveux 2018-10-18 268 7c335a91f0f4c6a Cedric Neveux 2018-10-18 269 if (wfe_iram_base & (FNCPY_ALIGN - 1)) 7c335a91f0f4c6a Cedric Neveux 2018-10-18 270 wfe_iram_base += FNCPY_ALIGN - 7c335a91f0f4c6a Cedric Neveux 2018-10-18 271 ((uintptr_t)wfe_iram_base % (FNCPY_ALIGN)); 7c335a91f0f4c6a Cedric Neveux 2018-10-18 272 7c335a91f0f4c6a Cedric Neveux 2018-10-18 273 wfe_change_freq = (void *)fncpy((void *)wfe_iram_base, 7c335a91f0f4c6a Cedric Neveux 2018-10-18 274 &imx_smp_wfe_optee, 7c335a91f0f4c6a Cedric Neveux 2018-10-18 275 ((&imx_smp_wfe_end -&imx_smp_wfe_start) *4)); 7c335a91f0f4c6a Cedric Neveux 2018-10-18 276 7c335a91f0f4c6a Cedric Neveux 2018-10-18 277 return 0; 7c335a91f0f4c6a Cedric Neveux 2018-10-18 278 7c335a91f0f4c6a Cedric Neveux 2018-10-18 279 } 7c335a91f0f4c6a Cedric Neveux 2018-10-18 280 7c335a91f0f4c6a Cedric Neveux 2018-10-18 @281 int init_freq_optee(struct platform_device *busfreq_pdev) :::::: The code at line 108 was first introduced by commit :::::: 7c335a91f0f4c6a7d7d0f8931e1570025222a379 MLK-20023 Move Busfreq support to OPTEE OS :::::: TO: Cedric Neveux <cedric.neveux(a)nxp.com&gt; :::::: CC: Silvano di Ninno <silvano.dininno(a)nxp.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org