Hi Valentin, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on tip/sched/core] [also build test WARNING on tip/auto-latest linux/master linus/master v5.8 next-20200812] [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] url: https://github.com/0day-ci/linux/commits/Valentin-Schneider/sched-Instrum... base: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git 949bcb8135a96a6923e676646bd29cbe69e8350f config: i386-randconfig-s001-20200811 (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.2-168-g9554805c-dirty # save the attached .config to linux build tree make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=i386 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) kernel/sched/debug.c:327:9: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct sched_domain *[assigned] sd @@ got struct sched_domain [noderef] __rcu *parent @@ kernel/sched/debug.c:327:9: sparse: expected struct sched_domain *[assigned] sd kernel/sched/debug.c:327:9: sparse: got struct sched_domain [noderef] __rcu *parent kernel/sched/debug.c:334:9: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct sched_domain *[assigned] sd @@ got struct sched_domain [noderef] __rcu *parent @@ kernel/sched/debug.c:334:9: sparse: expected struct sched_domain *[assigned] sd kernel/sched/debug.c:334:9: sparse: got struct sched_domain [noderef] __rcu *parent kernel/sched/debug.c:486:22: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/sched/debug.c:486:22: sparse: struct task_struct [noderef] __rcu * kernel/sched/debug.c:486:22: sparse: struct task_struct * kernel/sched/debug.c:694:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct task_struct *tsk @@ got struct task_struct [noderef] __rcu *curr @@ kernel/sched/debug.c:694:9: sparse: expected struct task_struct *tsk kernel/sched/debug.c:694:9: sparse: got struct task_struct [noderef] __rcu *curr kernel/sched/debug.c:694:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct task_struct *tsk @@ got struct task_struct [noderef] __rcu *curr @@ kernel/sched/debug.c:694:9: sparse: expected struct task_struct *tsk kernel/sched/debug.c:694:9: sparse: got struct task_struct [noderef] __rcu *curr vim +279 kernel/sched/debug.c 247 248 static int sd_ctl_doflags(struct ctl_table *table, int write, 249 void *buffer, size_t *lenp, loff_t *ppos) 250 { 251 unsigned long flags = *(unsigned long *)table->data; 252 size_t data_size = 0; 253 size_t len = 0; 254 char *tmp; 255 int idx; 256 257 if (write) 258 return 0; 259 260 for_each_set_bit(idx, &flags, __SD_FLAG_CNT) { 261 char *name = sd_flag_debug[idx].name; 262 263 /* Name plus whitespace */ 264 data_size += strlen(name) + 1; 265 } 266 267 if (*ppos > data_size) { 268 *lenp = 0; 269 return 0; 270 } 271 272 tmp = kcalloc(data_size + 1, sizeof(tmp), GFP_KERNEL); 273 for_each_set_bit(idx, &flags, __SD_FLAG_CNT) { 274 char *name = sd_flag_debug[idx].name; 275 276 len += snprintf(tmp + len, strlen(name) + 2, "%s ", name); 277 } 278 280 len -= *ppos; 281 282 if (len > *lenp) 283 len = *lenp; 284 if (len) 285 memcpy(buffer, tmp, len); 286 if (len < *lenp) { 287 ((char *)buffer)[len] = '\n'; 288 len++; 289 } 290 291 *lenp = len; 292 *ppos += len; 293 294 kfree(tmp); 295 296 return 0; 297 } 298 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org