Messages in this thread | | | Date | Fri, 6 May 2022 15:36:55 +0800 | From | kernel test robot <> | Subject | [intel-tdx:kvm-upstream-workaround 292/361] arch/x86/virt/vmx/tdx/tdx_debug.c:38:6: warning: variable 'ret' is used uninitialized whenever 'if' condition is false |
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tree: https://github.com/intel/tdx.git kvm-upstream-workaround head: 3b5b338cdf10dca7a2435d1f86b2dd9f1a3ad833 commit: 35b7a73dd22642a50aa614a812f76289a59d1509 [292/361] [REVERTME] debugfs to operation on TDX debug op config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20220506/202205061552.nQdkBaVb-lkp@intel.com/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 5e004fb787698440a387750db7f8028e7cb14cfc) 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/intel/tdx/commit/35b7a73dd22642a50aa614a812f76289a59d1509 git remote add intel-tdx https://github.com/intel/tdx.git git fetch --no-tags intel-tdx kvm-upstream-workaround git checkout 35b7a73dd22642a50aa614a812f76289a59d1509 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash
If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@intel.com>
All warnings (new ones prefixed by >>):
>> arch/x86/virt/vmx/tdx/tdx_debug.c:38:6: warning: variable 'ret' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized] if (debugconfig_supported) { ^~~~~~~~~~~~~~~~~~~~~ arch/x86/virt/vmx/tdx/tdx_debug.c:46:10: note: uninitialized use occurs here return ret; ^~~ arch/x86/virt/vmx/tdx/tdx_debug.c:38:2: note: remove the 'if' if its condition is always true if (debugconfig_supported) { ^~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/x86/virt/vmx/tdx/tdx_debug.c:36:9: note: initialize the variable 'ret' to silence this warning int ret; ^ = 0 1 warning generated.
vim +38 arch/x86/virt/vmx/tdx/tdx_debug.c
32 33 static inline u64 tddebugconfig(u64 subleaf, u64 param1, u64 param2) 34 { 35 static bool debugconfig_supported = true; 36 int ret; 37 > 38 if (debugconfig_supported) { 39 ret = __seamcall(SEAMCALL_TDDEBUGCONFIG, subleaf, param1, param2, 0, NULL); 40 if (ret) { 41 pr_info("DEBUGCONFIG SEAMCALL isn't supported.\n"); 42 debugconfig_supported = false; 43 } 44 } 45 46 return ret; 47 } 48
-- 0-DAY CI Kernel Test Service https://01.org/lkp
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