tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: f26c3abc432a2026ba9ee7767061a1f88aead6ec commit: f5d69f6290a37f5579ef24334d5bf8a59bb13ef4 [951/8804] leds: as3645a: Move driver to flash subdirectory config: arm-randconfig-c002-20210816 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project af7818093677dcb4c0840aef96bc029deb219e57) 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 # install arm cross compiling tool for clang build # apt-get install binutils-arm-linux-gnueabi # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commi... git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout f5d69f6290a37f5579ef24334d5bf8a59bb13ef4 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm clang-analyzer If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; clang-analyzer warnings: (new ones prefixed by >>) ^ include/linux/list.h:563:2: note: expanded from macro 'list_prev_entry' list_entry((pos)->member.prev, typeof(*(pos)), member) ^ include/linux/list.h:511:2: note: expanded from macro 'list_entry' container_of(ptr, type, member) ^ note: (skipping 2 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all) include/linux/compiler_types.h:328:2: note: expanded from macro 'compiletime_assert' _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__) ^ include/linux/compiler_types.h:316:2: note: expanded from macro '_compiletime_assert' __compiletime_assert(condition, msg, prefix, suffix) ^ include/linux/compiler_types.h:306:2: note: expanded from macro '__compiletime_assert' do { \ ^ sound/core/device.c:228:2: note: Loop condition is false. Execution continues on line 237 list_for_each_entry_safe_reverse(dev, next, &card->devices, list) { ^ include/linux/list.h:762:2: note: expanded from macro 'list_for_each_entry_safe_reverse' for (pos = list_last_entry(head, typeof(*pos), member), \ ^ sound/core/device.c:237:2: note: Left side of '&&' is false list_for_each_entry_safe_reverse(dev, next, &card->devices, list) ^ include/linux/list.h:762:13: note: expanded from macro 'list_for_each_entry_safe_reverse' for (pos = list_last_entry(head, typeof(*pos), member), \ ^ include/linux/list.h:533:2: note: expanded from macro 'list_last_entry' list_entry((ptr)->prev, type, member) ^ include/linux/list.h:511:2: note: expanded from macro 'list_entry' container_of(ptr, type, member) ^ include/linux/kernel.h:495:61: note: expanded from macro 'container_of' BUILD_BUG_ON_MSG(!__same_type(*(ptr), ((type *)0)->member) && \ ^ sound/core/device.c:237:2: note: Taking false branch list_for_each_entry_safe_reverse(dev, next, &card->devices, list) ^ include/linux/list.h:762:13: note: expanded from macro 'list_for_each_entry_safe_reverse' for (pos = list_last_entry(head, typeof(*pos), member), \ ^ include/linux/list.h:533:2: note: expanded from macro 'list_last_entry' list_entry((ptr)->prev, type, member) ^ include/linux/list.h:511:2: note: expanded from macro 'list_entry' container_of(ptr, type, member) ^ note: (skipping 2 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all) include/linux/compiler_types.h:328:2: note: expanded from macro 'compiletime_assert' _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__) ^ include/linux/compiler_types.h:316:2: note: expanded from macro '_compiletime_assert' __compiletime_assert(condition, msg, prefix, suffix) ^ include/linux/compiler_types.h:308:3: note: expanded from macro '__compiletime_assert' if (!(condition)) \ ^ sound/core/device.c:237:2: note: Loop condition is false. Exiting loop list_for_each_entry_safe_reverse(dev, next, &card->devices, list) ^ include/linux/list.h:762:13: note: expanded from macro 'list_for_each_entry_safe_reverse' for (pos = list_last_entry(head, typeof(*pos), member), \ ^ include/linux/list.h:533:2: note: expanded from macro 'list_last_entry' list_entry((ptr)->prev, type, member) ^ include/linux/list.h:511:2: note: expanded from macro 'list_entry' container_of(ptr, type, member) ^ note: (skipping 2 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all) include/linux/compiler_types.h:328:2: note: expanded from macro 'compiletime_assert' _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__) ^ include/linux/compiler_types.h:316:2: note: expanded from macro '_compiletime_assert' __compiletime_assert(condition, msg, prefix, suffix) ^ include/linux/compiler_types.h:306:2: note: expanded from macro '__compiletime_assert' do { \ ^ sound/core/device.c:237:2: note: Use of memory after it is freed list_for_each_entry_safe_reverse(dev, next, &card->devices, list) ^ include/linux/list.h:763:7: note: expanded from macro 'list_for_each_entry_safe_reverse' n = list_prev_entry(pos, member); \ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/list.h:563:2: note: expanded from macro 'list_prev_entry' list_entry((pos)->member.prev, typeof(*(pos)), member) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/list.h:511:2: note: expanded from macro 'list_entry' container_of(ptr, type, member) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/kernel.h:494:25: note: expanded from macro 'container_of' void *__mptr = (void *)(ptr); \ ^~~~~ Suppressed 2 warnings (2 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 4 warnings generated. struct device *dev = &flash->client->dev; ^~~ ~~~~~~~~~~~~~~~~~~~ drivers/leds/flash/leds-as3645a.c:382:17: note: Value stored to 'dev' during its initialization is never read struct device *dev = &flash->client->dev; ^~~ ~~~~~~~~~~~~~~~~~~~ Suppressed 3 warnings (3 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 3 warnings generated. Suppressed 3 warnings (3 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 3 warnings generated. Suppressed 3 warnings (3 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 2 warnings generated. Suppressed 2 warnings (2 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 3 warnings generated. Suppressed 3 warnings (3 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 3 warnings generated. Suppressed 3 warnings (3 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 4 warnings generated. sound/soc/codecs/wm8903.c:434:3: warning: Value stored to 'best' is never read [clang-analyzer-deadcode.DeadStores] best = 0; ^ ~ sound/soc/codecs/wm8903.c:434:3: note: Value stored to 'best' is never read best = 0; ^ ~ Suppressed 3 warnings (3 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 6 warnings generated. sound/soc/codecs/wm8960.c:508:18: warning: Access to field 'lout1' results in a dereference of a null pointer (loaded from variable 'wm8960') [clang-analyzer-core.NullDereference] wm8960->lout1 = w; ^ sound/soc/codecs/wm8960.c:1345:6: note: Assuming field 'capless' is false if (pdata->capless) ^~~~~~~~~~~~~~ sound/soc/codecs/wm8960.c:1345:2: note: Taking false branch if (pdata->capless) ^ sound/soc/codecs/wm8960.c:1352:2: note: Calling 'wm8960_add_widgets' wm8960_add_widgets(component); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ sound/soc/codecs/wm8960.c:472:2: note: 'wm8960' initialized here struct wm8960_priv *wm8960 = snd_soc_component_get_drvdata(component); ^~~~~~~~~~~~~~~~~~~~~~~~~~ sound/soc/codecs/wm8960.c:485:6: note: Assuming 'pdata' is null if (pdata && pdata->capless) { ^~~~~ sound/soc/codecs/wm8960.c:485:12: note: Left side of '&&' is false if (pdata && pdata->capless) { ^ sound/soc/codecs/wm8960.c:504:2: note: Left side of '&&' is false list_for_each_entry(w, &component->card->widgets, list) { ^ include/linux/list.h:628:13: note: expanded from macro 'list_for_each_entry' for (pos = list_first_entry(head, typeof(*pos), member); \ ^ include/linux/list.h:522:2: note: expanded from macro 'list_first_entry' list_entry((ptr)->next, type, member) ^ include/linux/list.h:511:2: note: expanded from macro 'list_entry' container_of(ptr, type, member) ^ include/linux/kernel.h:495:61: note: expanded from macro 'container_of' BUILD_BUG_ON_MSG(!__same_type(*(ptr), ((type *)0)->member) && \ ^ sound/soc/codecs/wm8960.c:504:2: note: Taking false branch list_for_each_entry(w, &component->card->widgets, list) { ^ include/linux/list.h:628:13: note: expanded from macro 'list_for_each_entry' for (pos = list_first_entry(head, typeof(*pos), member); \ ^ include/linux/list.h:522:2: note: expanded from macro 'list_first_entry' list_entry((ptr)->next, type, member) ^ include/linux/list.h:511:2: note: expanded from macro 'list_entry' container_of(ptr, type, member) ^ note: (skipping 2 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all) include/linux/compiler_types.h:328:2: note: expanded from macro 'compiletime_assert' _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__) ^ include/linux/compiler_types.h:316:2: note: expanded from macro '_compiletime_assert' __compiletime_assert(condition, msg, prefix, suffix) ^ include/linux/compiler_types.h:308:3: note: expanded from macro '__compiletime_assert' if (!(condition)) \ ^ sound/soc/codecs/wm8960.c:504:2: note: Loop condition is false. Exiting loop list_for_each_entry(w, &component->card->widgets, list) { ^ include/linux/list.h:628:13: note: expanded from macro 'list_for_each_entry' for (pos = list_first_entry(head, typeof(*pos), member); \ ^ include/linux/list.h:522:2: note: expanded from macro 'list_first_entry' list_entry((ptr)->next, type, member) ^ include/linux/list.h:511:2: note: expanded from macro 'list_entry' vim +/dev +382 drivers/leds/flash/leds-as3645a.c a56ba8fbcb55f3 drivers/leds/leds-as3645a.c Sakari Ailus 2015-04-26 379 a56ba8fbcb55f3 drivers/leds/leds-as3645a.c Sakari Ailus 2015-04-26 380 static int as3645a_setup(struct as3645a *flash) a56ba8fbcb55f3 drivers/leds/leds-as3645a.c Sakari Ailus 2015-04-26 381 { a56ba8fbcb55f3 drivers/leds/leds-as3645a.c Sakari Ailus 2015-04-26 @382 struct device *dev = &flash->client->dev; a56ba8fbcb55f3 drivers/leds/leds-as3645a.c Sakari Ailus 2015-04-26 383 u32 fault = 0; a56ba8fbcb55f3 drivers/leds/leds-as3645a.c Sakari Ailus 2015-04-26 384 int rval; a56ba8fbcb55f3 drivers/leds/leds-as3645a.c Sakari Ailus 2015-04-26 385 a56ba8fbcb55f3 drivers/leds/leds-as3645a.c Sakari Ailus 2015-04-26 386 /* clear errors */ a56ba8fbcb55f3 drivers/leds/leds-as3645a.c Sakari Ailus 2015-04-26 387 rval = as3645a_read(flash, AS_FAULT_INFO_REG); a56ba8fbcb55f3 drivers/leds/leds-as3645a.c Sakari Ailus 2015-04-26 388 if (rval < 0) a56ba8fbcb55f3 drivers/leds/leds-as3645a.c Sakari Ailus 2015-04-26 389 return rval; a56ba8fbcb55f3 drivers/leds/leds-as3645a.c Sakari Ailus 2015-04-26 390 a56ba8fbcb55f3 drivers/leds/leds-as3645a.c Sakari Ailus 2015-04-26 391 dev_dbg(dev, "Fault info: %02x\n", rval); a56ba8fbcb55f3 drivers/leds/leds-as3645a.c Sakari Ailus 2015-04-26 392 a56ba8fbcb55f3 drivers/leds/leds-as3645a.c Sakari Ailus 2015-04-26 393 rval = as3645a_set_current(flash); a56ba8fbcb55f3 drivers/leds/leds-as3645a.c Sakari Ailus 2015-04-26 394 if (rval < 0) a56ba8fbcb55f3 drivers/leds/leds-as3645a.c Sakari Ailus 2015-04-26 395 return rval; a56ba8fbcb55f3 drivers/leds/leds-as3645a.c Sakari Ailus 2015-04-26 396 a56ba8fbcb55f3 drivers/leds/leds-as3645a.c Sakari Ailus 2015-04-26 397 rval = as3645a_set_timeout(flash); a56ba8fbcb55f3 drivers/leds/leds-as3645a.c Sakari Ailus 2015-04-26 398 if (rval < 0) a56ba8fbcb55f3 drivers/leds/leds-as3645a.c Sakari Ailus 2015-04-26 399 return rval; a56ba8fbcb55f3 drivers/leds/leds-as3645a.c Sakari Ailus 2015-04-26 400 a56ba8fbcb55f3 drivers/leds/leds-as3645a.c Sakari Ailus 2015-04-26 401 rval = as3645a_set_control(flash, AS_MODE_INDICATOR, false); a56ba8fbcb55f3 drivers/leds/leds-as3645a.c Sakari Ailus 2015-04-26 402 if (rval < 0) a56ba8fbcb55f3 drivers/leds/leds-as3645a.c Sakari Ailus 2015-04-26 403 return rval; a56ba8fbcb55f3 drivers/leds/leds-as3645a.c Sakari Ailus 2015-04-26 404 a56ba8fbcb55f3 drivers/leds/leds-as3645a.c Sakari Ailus 2015-04-26 405 /* read status */ a56ba8fbcb55f3 drivers/leds/leds-as3645a.c Sakari Ailus 2015-04-26 406 rval = as3645a_get_fault(&flash->fled, &fault); a56ba8fbcb55f3 drivers/leds/leds-as3645a.c Sakari Ailus 2015-04-26 407 if (rval < 0) a56ba8fbcb55f3 drivers/leds/leds-as3645a.c Sakari Ailus 2015-04-26 408 return rval; a56ba8fbcb55f3 drivers/leds/leds-as3645a.c Sakari Ailus 2015-04-26 409 a56ba8fbcb55f3 drivers/leds/leds-as3645a.c Sakari Ailus 2015-04-26 410 dev_dbg(dev, "AS_INDICATOR_AND_TIMER_REG: %02x\n", a56ba8fbcb55f3 drivers/leds/leds-as3645a.c Sakari Ailus 2015-04-26 411 as3645a_read(flash, AS_INDICATOR_AND_TIMER_REG)); a56ba8fbcb55f3 drivers/leds/leds-as3645a.c Sakari Ailus 2015-04-26 412 dev_dbg(dev, "AS_CURRENT_SET_REG: %02x\n", a56ba8fbcb55f3 drivers/leds/leds-as3645a.c Sakari Ailus 2015-04-26 413 as3645a_read(flash, AS_CURRENT_SET_REG)); a56ba8fbcb55f3 drivers/leds/leds-as3645a.c Sakari Ailus 2015-04-26 414 dev_dbg(dev, "AS_CONTROL_REG: %02x\n", a56ba8fbcb55f3 drivers/leds/leds-as3645a.c Sakari Ailus 2015-04-26 415 as3645a_read(flash, AS_CONTROL_REG)); a56ba8fbcb55f3 drivers/leds/leds-as3645a.c Sakari Ailus 2015-04-26 416 a56ba8fbcb55f3 drivers/leds/leds-as3645a.c Sakari Ailus 2015-04-26 417 return rval & ~AS_FAULT_INFO_LED_AMOUNT ? -EIO : 0; a56ba8fbcb55f3 drivers/leds/leds-as3645a.c Sakari Ailus 2015-04-26 418 } a56ba8fbcb55f3 drivers/leds/leds-as3645a.c Sakari Ailus 2015-04-26 419 :::::: The code at line 382 was first introduced by commit :::::: a56ba8fbcb55f3c5fc06f803469e7412f9e13c18 media: leds: as3645a: Add LED flash class driver :::::: TO: Sakari Ailus <sakari.ailus(a)linux.intel.com&gt; :::::: CC: Mauro Carvalho Chehab <mchehab(a)s-opensource.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org