tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 8903263671cb22bc33545eb7cbd68c875bb87e95 commit: f3691b7ba5c39508aaac341050e72304bb1a115d [3504/6488] PCI: Fix pci_cfg_wait queue locking problem config: riscv-randconfig-s031-20200708 (attached as .config) compiler: riscv64-linux-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.2-37-gc9676a3b-dirty git checkout f3691b7ba5c39508aaac341050e72304bb1a115d # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=riscv If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) vim +/pci_wait_cfg +22 arch/riscv/include/asm/irqflags.h 6d60b6ee0c9777 Palmer Dabbelt 2017-07-10 18 6d60b6ee0c9777 Palmer Dabbelt 2017-07-10 19 /* unconditionally enable interrupts */ 6d60b6ee0c9777 Palmer Dabbelt 2017-07-10 20 static inline void arch_local_irq_enable(void) 6d60b6ee0c9777 Palmer Dabbelt 2017-07-10 21 { a4c3733d32a72f Christoph Hellwig 2019-10-28 @22 csr_set(CSR_STATUS, SR_IE); 6d60b6ee0c9777 Palmer Dabbelt 2017-07-10 23 } 6d60b6ee0c9777 Palmer Dabbelt 2017-07-10 24 :::::: The code at line 22 was first introduced by commit :::::: a4c3733d32a72f11dee86d0731d7565aa6ebe22d riscv: abstract out CSR names for supervisor vs machine mode :::::: TO: Christoph Hellwig <hch(a)lst.de&gt; :::::: CC: Paul Walmsley <paul.walmsley(a)sifive.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org