tree: https://github.com/avpatel/linux.git riscv_kvm_aia_v1 head: eb55ca3817a59020fc1e3d5a5de0a5adcebbedd0 commit: dc0299fdaf9714a56b13b955c086bab2f8bd4046 [39/40] RISC-V: KVM: Add in-kernel emulation of AIA APLIC config: riscv-randconfig-c006-20211207 (https://download.01.org/0day-ci/archive/20211208/202112080820.BR1BIqGS-lk...) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 097a1cb1d5ebb3a0ec4bcaed8ba3ff6a8e33c00a) 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 riscv cross compiling tool for clang build # apt-get install binutils-riscv64-linux-gnu # https://github.com/avpatel/linux/commit/dc0299fdaf9714a56b13b955c086bab2f... git remote add avpatel https://github.com/avpatel/linux.git git fetch --no-tags avpatel riscv_kvm_aia_v1 git checkout dc0299fdaf9714a56b13b955c086bab2f8bd4046 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=riscv SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): if (irqd->sourcecfg & APLIC_SOURCECFG_D) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/riscv/kvm/aia_aplic.c:293:6: note: uninitialized use occurs here if (inject) ^~~~~~ arch/riscv/kvm/aia_aplic.c:254:2: note: remove the 'if' if its condition is always false if (irqd->sourcecfg & APLIC_SOURCECFG_D) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/riscv/kvm/aia_aplic.c:242:13: note: initialize the variable 'inject' to silence this warning bool inject, ie; ^ = 0 1 warning generated. vim +254 arch/riscv/kvm/aia_aplic.c 238 239 int kvm_riscv_aia_aplic_inject(struct kvm *kvm, u32 source, bool level) 240 { 241 u32 target; 242 bool inject, ie; 243 unsigned long flags; 244 struct aplic_irq *irqd; 245 struct aplic *aplic = kvm->arch.aia.aplic_state; 246 247 if (!aplic || !source || (aplic->nr_irqs <= source)) 248 return -ENODEV; 249 irqd = &aplic->irqs[source]; 250 ie = (aplic->domaincfg & APLIC_DOMAINCFG_IE) ? true : false; 251 252 raw_spin_lock_irqsave(&irqd->lock, flags); 253 255 goto skip_unlock; 256 257 switch (irqd->sourcecfg & APLIC_SOURCECFG_SM_MASK) { 258 case APLIC_SOURCECFG_SM_EDGE_RISE: 259 if (level && !(irqd->state & APLIC_IRQ_STATE_INPUT) && 260 !(irqd->state & APLIC_IRQ_STATE_PENDING)) 261 irqd->state |= APLIC_IRQ_STATE_PENDING; 262 break; 263 case APLIC_SOURCECFG_SM_EDGE_FALL: 264 if (!level && (irqd->state & APLIC_IRQ_STATE_INPUT) && 265 !(irqd->state & APLIC_IRQ_STATE_PENDING)) 266 irqd->state |= APLIC_IRQ_STATE_PENDING; 267 break; 268 case APLIC_SOURCECFG_SM_LEVEL_HIGH: 269 if (level && !(irqd->state & APLIC_IRQ_STATE_PENDING)) 270 irqd->state |= APLIC_IRQ_STATE_PENDING; 271 break; 272 case APLIC_SOURCECFG_SM_LEVEL_LOW: 273 if (!level && !(irqd->state & APLIC_IRQ_STATE_PENDING)) 274 irqd->state |= APLIC_IRQ_STATE_PENDING; 275 break; 276 } 277 278 if (level) 279 irqd->state |= APLIC_IRQ_STATE_INPUT; 280 else 281 irqd->state &= ~APLIC_IRQ_STATE_INPUT; 282 283 inject = false; 284 target = irqd->target; 285 if (ie && (irqd->state & APLIC_IRQ_STATE_ENPEND)) { 286 irqd->state &= ~APLIC_IRQ_STATE_PENDING; 287 inject = true; 288 } 289 290 skip_unlock: 291 raw_spin_unlock_irqrestore(&irqd->lock, flags); 292 293 if (inject) 294 aplic_inject_msi(kvm, source, target); 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