tree: https://github.com/dlech/linux bone-counter head: dc99d06b0f101cff0b3157b1cb49e28e95387c46 commit: d698926a635b0cf342b9b18e04b5f15701834158 [3/21] counter: Add character device interface config: x86_64-randconfig-m001-20201213 (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; Reported-by: Dan Carpenter <dan.carpenter(a)oracle.com&gt; smatch warnings: drivers/counter/counter-chrdev.c:396 counter_get_data() error: uninitialized symbol 'value_u8'. vim +/value_u8 +396 drivers/counter/counter-chrdev.c d698926a635b0cf William Breathitt Gray 2020-11-22 362 static int counter_get_data(struct counter_device *const counter, d698926a635b0cf William Breathitt Gray 2020-11-22 363 const struct counter_comp_node *const comp_node, d698926a635b0cf William Breathitt Gray 2020-11-22 364 u64 *const value) d698926a635b0cf William Breathitt Gray 2020-11-22 365 { d698926a635b0cf William Breathitt Gray 2020-11-22 366 const struct counter_comp *const comp = &comp_node->comp; d698926a635b0cf William Breathitt Gray 2020-11-22 367 void *const parent = comp_node->parent; d698926a635b0cf William Breathitt Gray 2020-11-22 368 int err = 0; d698926a635b0cf William Breathitt Gray 2020-11-22 369 u8 value_u8; d698926a635b0cf William Breathitt Gray 2020-11-22 370 d698926a635b0cf William Breathitt Gray 2020-11-22 371 /* Dummy components don't have data so return early */ d698926a635b0cf William Breathitt Gray 2020-11-22 372 if (comp_node->component.type == COUNTER_COMPONENT_DUMMY) d698926a635b0cf William Breathitt Gray 2020-11-22 373 return 0; d698926a635b0cf William Breathitt Gray 2020-11-22 374 d698926a635b0cf William Breathitt Gray 2020-11-22 375 switch (comp->type) { d698926a635b0cf William Breathitt Gray 2020-11-22 376 case COUNTER_COMP_U8: d698926a635b0cf William Breathitt Gray 2020-11-22 377 case COUNTER_COMP_BOOL: d698926a635b0cf William Breathitt Gray 2020-11-22 378 case COUNTER_COMP_SIGNAL_LEVEL: d698926a635b0cf William Breathitt Gray 2020-11-22 379 case COUNTER_COMP_FUNCTION: d698926a635b0cf William Breathitt Gray 2020-11-22 380 case COUNTER_COMP_ENUM: d698926a635b0cf William Breathitt Gray 2020-11-22 381 case COUNTER_COMP_COUNT_DIRECTION: d698926a635b0cf William Breathitt Gray 2020-11-22 382 case COUNTER_COMP_COUNT_MODE: d698926a635b0cf William Breathitt Gray 2020-11-22 383 switch (comp_node->component.scope) { d698926a635b0cf William Breathitt Gray 2020-11-22 384 case COUNTER_SCOPE_DEVICE: d698926a635b0cf William Breathitt Gray 2020-11-22 385 err = comp->device_u8_read(counter, &value_u8); d698926a635b0cf William Breathitt Gray 2020-11-22 386 break; d698926a635b0cf William Breathitt Gray 2020-11-22 387 case COUNTER_SCOPE_SIGNAL: d698926a635b0cf William Breathitt Gray 2020-11-22 388 err = comp->signal_u8_read(counter, parent, &value_u8); d698926a635b0cf William Breathitt Gray 2020-11-22 389 break; d698926a635b0cf William Breathitt Gray 2020-11-22 390 case COUNTER_SCOPE_COUNT: d698926a635b0cf William Breathitt Gray 2020-11-22 391 err = comp->count_u8_read(counter, parent, &value_u8); d698926a635b0cf William Breathitt Gray 2020-11-22 392 break; No default case. d698926a635b0cf William Breathitt Gray 2020-11-22 393 } d698926a635b0cf William Breathitt Gray 2020-11-22 394 if (err) d698926a635b0cf William Breathitt Gray 2020-11-22 395 return err; d698926a635b0cf William Breathitt Gray 2020-11-22 @396 *value = value_u8; d698926a635b0cf William Breathitt Gray 2020-11-22 397 break; d698926a635b0cf William Breathitt Gray 2020-11-22 398 case COUNTER_COMP_U64: d698926a635b0cf William Breathitt Gray 2020-11-22 399 switch (comp_node->component.scope) { d698926a635b0cf William Breathitt Gray 2020-11-22 400 case COUNTER_SCOPE_DEVICE: d698926a635b0cf William Breathitt Gray 2020-11-22 401 return comp->device_u64_read(counter, value); d698926a635b0cf William Breathitt Gray 2020-11-22 402 case COUNTER_SCOPE_SIGNAL: d698926a635b0cf William Breathitt Gray 2020-11-22 403 return comp->signal_u64_read(counter, parent, value); d698926a635b0cf William Breathitt Gray 2020-11-22 404 case COUNTER_SCOPE_COUNT: d698926a635b0cf William Breathitt Gray 2020-11-22 405 return comp->count_u64_read(counter, parent, value); d698926a635b0cf William Breathitt Gray 2020-11-22 406 } d698926a635b0cf William Breathitt Gray 2020-11-22 407 break; d698926a635b0cf William Breathitt Gray 2020-11-22 408 case COUNTER_COMP_SYNAPSE_ACTION: d698926a635b0cf William Breathitt Gray 2020-11-22 409 err = comp->action_read(counter, parent, comp->priv, &value_u8); d698926a635b0cf William Breathitt Gray 2020-11-22 410 if (err) d698926a635b0cf William Breathitt Gray 2020-11-22 411 return err; d698926a635b0cf William Breathitt Gray 2020-11-22 412 *value = value_u8; d698926a635b0cf William Breathitt Gray 2020-11-22 413 break; d698926a635b0cf William Breathitt Gray 2020-11-22 414 } d698926a635b0cf William Breathitt Gray 2020-11-22 415 d698926a635b0cf William Breathitt Gray 2020-11-22 416 return 0; d698926a635b0cf William Breathitt Gray 2020-11-22 417 } --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org