/bin/bash: line 1: 574107 Segmentation fault clang -Wp,-MMD,drivers/iio/humidity/.hdc3020.o.d -nostdinc -Iarch/mips/include -I./arch/mips/include/generated -Iinclude -I./include -Iarch/mips/include/uapi -I./arch/mips/include/generated/uapi -Iinclude/...

/bin/bash: line 1: 574107 Segmentation fault clang -Wp,-MMD,drivers/iio/humidity/.hdc3020.o.d -nostdinc -Iarch/mips/include -I./arch/mips/include/generated -Iinclude -I./include -Iarch/mips/include/uapi -I./arch/mips/include/generated/uapi -Iinclude/...

[kernel test robot]

:::::: 
:::::: Manual check reason: "clang compiler bug"
:::::: 

BCC: lkp@intel.com
CC: oe-kbuild-all@lists.linux.dev
CC: linux-kernel@vger.kernel.org
TO: Dimitri Fedrau <dimitri.fedrau@liebherr.com>
CC: Jonathan Cameron <Jonathan.Cameron@huawei.com>
CC: Javier Carrasco <javier.carrasco.cruz@gmail.com>

Hi Dimitri,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   665159e246749578d4e4bfe106ee3b74edcdab18
commit: cb372b4f46d4285e5d2c07ba734374151b8e34e7 iio: humditiy: hdc3020: fix units for thresholds and hysteresis
date:   9 months ago
:::::: branch date: 21 hours ago
:::::: commit date: 9 months ago
config: mips-randconfig-r134-20260701 (https://download.01.org/0day-ci/archive/20260702/202607020828.Co2CUHV4-lkp@intel.com/config)
compiler: clang version 23.0.0git (https://github.com/llvm/llvm-project 6cc609bb250b21b47fc7d394b4019101e9983597)
sparse: v0.6.5-rc1
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260702/202607020828.Co2CUHV4-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
| Fixes: cb372b4f46d4 ("iio: humditiy: hdc3020: fix units for thresholds and hysteresis")
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/r/202607020828.Co2CUHV4-lkp@intel.com/

Note: functions only called from assembly code should be annotated with the asmlinkage attribute
All errors (new ones prefixed by >>):

   warning: MIPS-I support is experimental
   PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace and dumped files.
   Stack dump:
   0.	Program arguments: clang -Wp,-MMD,drivers/iio/humidity/.hdc3020.o.d -nostdinc -Iarch/mips/include -I./arch/mips/include/generated -Iinclude -I./include -Iarch/mips/include/uapi -I./arch/mips/include/generated/uapi -Iinclude/uapi -I./include/generated/uapi -include include/linux/compiler-version.h -include include/linux/kconfig.h -include include/linux/compiler_types.h -D__KERNEL__ --target=mipsel-linux-gnu -fintegrated-as -Werror=unknown-warning-option -Werror=ignored-optimization-argument -Werror=option-ignored -Werror=unused-command-line-argument -DVMLINUX_LOAD_ADDRESS=0xffffffff80040000 -DLINKER_LOAD_ADDRESS=0x80040000 -DDATAOFFSET=0 -fmacro-prefix-map== -Wundef -DKBUILD_EXTRA_WARN1 -std=gnu11 -fshort-wchar -funsigned-char -fno-common -fno-PIE -fno-strict-aliasing -mno-check-zero-division -mabi=32 -G 0 -mno-abicalls -fno-pic -pipe -msoft-float -Wa,-msoft-float -ffreestanding -EL -fno-stack-check -march=mips1 -DTOOLCHAIN_SUPPORTS_VIRT -Iarch/mips/include/asm/mach-dec -Iarch/mips/include/asm/mach-generic -fno-asynchronous-unwind-tables -fno-delete-null-pointer-checks -O2 -fno-stack-protector -fomit-frame-pointer -fstrict-flex-arrays=3 -fno-strict-overflow -fno-stack-check -fno-builtin-wcslen -Wall -Wextra -Wundef -Werror=implicit-function-declaration -Werror=implicit-int -Werror=return-type -Werror=strict-prototypes -Wno-format-security -Wno-trigraphs -Wno-frame-address -Wno-address-of-packed-member -Wmissing-declarations -Wmissing-prototypes -Wno-gnu -Wno-format-overflow-non-kprintf -Wno-format-truncation-non-kprintf -Wno-default-const-init-unsafe -Wno-pointer-sign -Wcast-function-type -Wno-unterminated-string-initialization -Wimplicit-fallthrough -Werror=date-time -Werror=incompatible-pointer-types -Wenum-conversion -Wunused -Wmissing-format-attribute -Wmissing-include-dirs -Wunused-const-variable -Wno-missing-field-initializers -Wno-type-limits -Wno-shift-negative-value -Wno-enum-enum-conversion -Wno-sign-compare -Wno-unused-parameter -gsplit-dwarf -g -fno-var-tracking -fno-crash-diagnostics -Wno-error=return-type -Wreturn-type -funsigned-char -Wundef -falign-functions=64 -Idrivers/iio/common/hid-sensors -fsanitize=array-bounds -fsanitize=shift -fsanitize=enum -Idrivers/iio/humidity -Idrivers/iio/humidity -DMODULE -mlong-calls -DKBUILD_BASENAME=\"hdc3020\" -DKBUILD_MODNAME=\"hdc3020\" -D__KBUILD_MODNAME=kmod_hdc3020 -c -o drivers/iio/humidity/hdc3020.o drivers/iio/humidity/hdc3020.c
   1.	<eof> parser at end of file
   2.	Code generation
   3.	Running pass 'Function Pass Manager' on module 'drivers/iio/humidity/hdc3020.c'.
   4.	Running pass 'Shrink Wrapping analysis' on function '@hdc3020_write_thresh'
    #0 0x00005566aad352cb llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (clang-23+0x3ed52cb)
    #1 0x00005566aad32e84 llvm::sys::CleanupOnSignal(unsigned long) (clang-23+0x3ed2e84)
    #2 0x00005566aac677a0 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
    #3 0x00007f174017adf0 (/lib/x86_64-linux-gnu/libc.so.6+0x3fdf0)
    #4 0x00005566aa309c8e (anonymous namespace)::ShrinkWrapImpl::useOrDefCSROrFI(llvm::MachineInstr const&, llvm::RegScavenger*, bool) const ShrinkWrap.cpp:0:0
    #5 0x00005566aa30baac (anonymous namespace)::ShrinkWrapImpl::postShrinkWrapping(bool, llvm::MachineFunction&, llvm::RegScavenger*) ShrinkWrap.cpp:0:0
    #6 0x00005566aa30e230 (anonymous namespace)::ShrinkWrapImpl::run(llvm::MachineFunction&) ShrinkWrap.cpp:0:0
    #7 0x00005566aa30f698 (anonymous namespace)::ShrinkWrapLegacy::runOnMachineFunction(llvm::MachineFunction&) (.part.0) ShrinkWrap.cpp:0:0
    #8 0x00005566aa0e7933 llvm::MachineFunctionPass::runOnFunction(llvm::Function&) (clang-23+0x3287933)
    #9 0x00005566aa63c729 llvm::FPPassManager::runOnFunction(llvm::Function&) (clang-23+0x37dc729)
   #10 0x00005566aa63cb5c llvm::FPPassManager::runOnModule(llvm::Module&) (clang-23+0x37dcb5c)
   #11 0x00005566aa63d6ca (anonymous namespace)::MPPassManager::runOnModule(llvm::Module&) LegacyPassManager.cpp:0:0
   #12 0x00005566aa63e2dc llvm::legacy::PassManagerImpl::run(llvm::Module&) (clang-23+0x37de2dc)
   #13 0x00005566ab0f66cf clang::emitBackendOutput(clang::CompilerInstance&, clang::CodeGenOptions&, llvm::StringRef, llvm::Module*, clang::BackendAction, llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem>, std::unique_ptr<llvm::raw_pwrite_stream, std::default_delete<llvm::raw_pwrite_stream>>, clang::BackendConsumer*) (clang-23+0x42966cf)
   #14 0x00005566ab72bfe7 clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&) (clang-23+0x48cbfe7)
   #15 0x00005566ad0f5cdc clang::ParseAST(clang::Sema&, bool, bool) (clang-23+0x6295cdc)
   #16 0x00005566aba929de clang::FrontendAction::Execute() (clang-23+0x4c329de)
   #17 0x00005566aba1927e clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (clang-23+0x4bb927e)
   #18 0x00005566abb77b07 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (clang-23+0x4d17b07)
   #19 0x00005566a7db2038 cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (clang-23+0xf52038)
   #20 0x00005566a7da9d03 ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&, llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem>) driver.cpp:0:0
   #21 0x00005566a7da9d43 int llvm::function_ref<int (llvm::SmallVectorImpl<char const*>&)>::callback_fn<clang_main(int, char**, llvm::ToolContext const&)::'lambda'(llvm::SmallVectorImpl<char const*>&)>(long, llvm::SmallVectorImpl<char const*>&) driver.cpp:0:0
   #22 0x00005566ab7a5a99 void llvm::function_ref<void ()>::callback_fn<clang::driver::CC1Command::Execute(llvm::ArrayRef<std::optional<llvm::StringRef>>, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>*, bool*) const::'lambda'()>(long) Job.cpp:0:0
   #23 0x00005566aac67b03 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (clang-23+0x3e07b03)
   #24 0x00005566ab7a61c4 clang::driver::CC1Command::Execute(llvm::ArrayRef<std::optional<llvm::StringRef>>, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>*, bool*) const (.part.0) Job.cpp:0:0
   #25 0x00005566ab762d08 clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (clang-23+0x4902d08)
   #26 0x00005566ab763c62 clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&, bool) const (clang-23+0x4903c62)
   #27 0x00005566ab7744dc clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (clang-23+0x49144dc)
   #28 0x00005566a7dae9f6 clang_main(int, char**, llvm::ToolContext const&) (clang-23+0xf4e9f6)
   #29 0x00005566a7cada69 main (clang-23+0xe4da69)
   #30 0x00007f1740164ca8 (/lib/x86_64-linux-gnu/libc.so.6+0x29ca8)
   #31 0x00007f1740164d65 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29d65)
   #32 0x00005566a7da9741 _start (clang-23+0xf49741)
   clang: error: clang frontend command failed due to signal (use -v to see invocation)
>> /bin/bash: line 1: 574107 Segmentation fault      clang -Wp,-MMD,drivers/iio/humidity/.hdc3020.o.d -nostdinc -Iarch/mips/include -I./arch/mips/include/generated -Iinclude -I./include -Iarch/mips/include/uapi -I./arch/mips/include/generated/uapi -Iinclude/uapi -I./include/generated/uapi -include include/linux/compiler-version.h -include include/linux/kconfig.h -include include/linux/compiler_types.h -D__KERNEL__ --target=mipsel-linux-gnu -fintegrated-as -Werror=unknown-warning-option -Werror=ignored-optimization-argument -Werror=option-ignored -Werror=unused-command-line-argument -DVMLINUX_LOAD_ADDRESS=0xffffffff80040000 -DLINKER_LOAD_ADDRESS=0x80040000 -DDATAOFFSET=0 -fmacro-prefix-map== -Wundef -DKBUILD_EXTRA_WARN1 -std=gnu11 -fshort-wchar -funsigned-char -fno-common -fno-PIE -fno-strict-aliasing -mno-check-zero-division -mabi=32 -G 0 -mno-abicalls -fno-pic -pipe -msoft-float -Wa,-msoft-float -ffreestanding -EL -fno-stack-check -march=mips1 -DTOOLCHAIN_SUPPORTS_VIRT -Iarch/mips/include/asm/mach-dec -Iarch/mips/include/asm/mach-generic -fno-asynchronous-unwind-tables -fno-delete-null-pointer-checks -O2 -fno-stack-protector -fomit-frame-pointer -fstrict-flex-arrays=3 -fno-strict-overflow -fno-stack-check -fno-builtin-wcslen -Wall -Wextra -Wundef -Werror=implicit-function-declaration -Werror=implicit-int -Werror=return-type -Werror=strict-prototypes -Wno-format-security -Wno-trigraphs -Wno-frame-address -Wno-address-of-packed-member -Wmissing-declarations -Wmissing-prototypes -Wno-gnu -Wno-format-overflow-non-kprintf -Wno-format-truncation-non-kprintf -Wno-default-const-init-unsafe -Wno-pointer-sign -Wcast-function-type -Wno-unterminated-string-initialization -Wimplicit-fallthrough -Werror=date-time -Werror=incompatible-pointer-types -Wenum-conversion -Wunused -Wmissing-format-attribute -Wmissing-include-dirs -Wunused-const-variable -Wno-missing-field-initializers -Wno-type-limits -Wno-shift-negative-value -Wno-enum-enum-conversion -Wno-sign-compare -Wno-unused-parameter -gsplit-dwarf -g -fno-var-tracking -fno-crash-diagnostics -Wno-error=return-type -Wreturn-type -funsigned-char -Wundef -falign-functions=64 -Idrivers/iio/common/hid-sensors -fsanitize=array-bounds -fsanitize=shift -fsanitize=enum -Idrivers/iio/humidity -Idrivers/iio/humidity -DMODULE -mlong-calls -DKBUILD_BASENAME='"hdc3020"' -DKBUILD_MODNAME='"hdc3020"' -D__KBUILD_MODNAME=kmod_hdc3020 -c -o drivers/iio/humidity/hdc3020.o drivers/iio/humidity/hdc3020.c

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