Hi Kefeng, First bad commit (maybe != root cause): tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 61556703b610a104de324e4f061dc6cf7b218b46 commit: ed1ed4c0da5447c5e322481ce2ef9f03336c6ffb riscv: mmiowb: Fix implicit declaration of function 'smp_processor_id' date: 9 months ago config: riscv-randconfig-s031-20210209 (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: v0.6.3-215-g0fb77bb6-dirty # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout ed1ed4c0da5447c5e322481ce2ef9f03336c6ffb # 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 >>)" drivers/scsi/bnx2i/bnx2i_hwi.c:347:25: sparse: sparse: incorrect type in assignment (different base types) @@ expected unsigned short [usertype] tsih @@ got restricted __be16 [usertype] tsih @@ drivers/scsi/bnx2i/bnx2i_hwi.c:347:25: sparse: expected unsigned short [usertype] tsih drivers/scsi/bnx2i/bnx2i_hwi.c:347:25: sparse: got restricted __be16 [usertype] tsih drivers/scsi/bnx2i/bnx2i_hwi.c:350:24: sparse: sparse: incorrect type in assignment (different base types) @@ expected unsigned short [usertype] cid @@ got restricted __be16 [usertype] cid @@ drivers/scsi/bnx2i/bnx2i_hwi.c:350:24: sparse: expected unsigned short [usertype] cid drivers/scsi/bnx2i/bnx2i_hwi.c:350:24: sparse: got restricted __be16 [usertype] cid drivers/scsi/bnx2i/bnx2i_hwi.c:427:54: sparse: sparse: restricted itt_t degrades to integer drivers/scsi/bnx2i/bnx2i_hwi.c:430:39: sparse: sparse: incorrect type in assignment (different base types) @@ expected unsigned int [usertype] ref_itt @@ got restricted itt_t [usertype] @@ drivers/scsi/bnx2i/bnx2i_hwi.c:430:39: sparse: expected unsigned int [usertype] ref_itt drivers/scsi/bnx2i/bnx2i_hwi.c:430:39: sparse: got restricted itt_t [usertype] drivers/scsi/bnx2i/bnx2i_hwi.c:433:32: sparse: sparse: cast to restricted __be32 drivers/scsi/bnx2i/bnx2i_hwi.c:433:32: sparse: sparse: cast to restricted __be32 drivers/scsi/bnx2i/bnx2i_hwi.c:433:32: sparse: sparse: cast to restricted __be32 drivers/scsi/bnx2i/bnx2i_hwi.c:433:32: sparse: sparse: cast to restricted __be32 drivers/scsi/bnx2i/bnx2i_hwi.c:433:32: sparse: sparse: cast to restricted __be32 drivers/scsi/bnx2i/bnx2i_hwi.c:433:32: sparse: sparse: cast to restricted __be32 drivers/scsi/bnx2i/bnx2i_hwi.c:434:32: sparse: sparse: cast to restricted __be32 drivers/scsi/bnx2i/bnx2i_hwi.c:434:32: sparse: sparse: cast to restricted __be32 drivers/scsi/bnx2i/bnx2i_hwi.c:434:32: sparse: sparse: cast to restricted __be32 drivers/scsi/bnx2i/bnx2i_hwi.c:434:32: sparse: sparse: cast to restricted __be32 drivers/scsi/bnx2i/bnx2i_hwi.c:434:32: sparse: sparse: cast to restricted __be32 drivers/scsi/bnx2i/bnx2i_hwi.c:434:32: sparse: sparse: cast to restricted __be32 drivers/scsi/bnx2i/bnx2i_hwi.c:1350:48: sparse: sparse: incorrect type in argument 2 (different base types) @@ expected restricted itt_t [usertype] @@ got int @@ drivers/scsi/bnx2i/bnx2i_hwi.c:1350:48: sparse: expected restricted itt_t [usertype] drivers/scsi/bnx2i/bnx2i_hwi.c:1350:48: sparse: got int drivers/scsi/bnx2i/bnx2i_hwi.c:1446:45: sparse: sparse: incorrect type in argument 2 (different base types) @@ expected restricted itt_t [usertype] @@ got int @@ drivers/scsi/bnx2i/bnx2i_hwi.c:1446:45: sparse: expected restricted itt_t [usertype] drivers/scsi/bnx2i/bnx2i_hwi.c:1446:45: sparse: got int drivers/scsi/bnx2i/bnx2i_hwi.c:1513:50: sparse: sparse: incorrect type in argument 2 (different base types) @@ expected restricted itt_t [usertype] @@ got int @@ drivers/scsi/bnx2i/bnx2i_hwi.c:1513:50: sparse: expected restricted itt_t [usertype] drivers/scsi/bnx2i/bnx2i_hwi.c:1513:50: sparse: got int drivers/scsi/bnx2i/bnx2i_hwi.c:1573:47: sparse: sparse: incorrect type in argument 2 (different base types) @@ expected restricted itt_t [usertype] @@ got int @@ drivers/scsi/bnx2i/bnx2i_hwi.c:1573:47: sparse: expected restricted itt_t [usertype] drivers/scsi/bnx2i/bnx2i_hwi.c:1573:47: sparse: got int drivers/scsi/bnx2i/bnx2i_hwi.c:1612:46: sparse: sparse: incorrect type in argument 2 (different base types) @@ expected restricted itt_t [usertype] @@ got int @@ drivers/scsi/bnx2i/bnx2i_hwi.c:1612:46: sparse: expected restricted itt_t [usertype] drivers/scsi/bnx2i/bnx2i_hwi.c:1612:46: sparse: got int drivers/scsi/bnx2i/bnx2i_hwi.c:1627:26: sparse: sparse: incorrect type in assignment (different base types) @@ expected restricted __be16 [usertype] t2wait @@ got restricted __be32 [usertype] @@ drivers/scsi/bnx2i/bnx2i_hwi.c:1627:26: sparse: expected restricted __be16 [usertype] t2wait drivers/scsi/bnx2i/bnx2i_hwi.c:1627:26: sparse: got restricted __be32 [usertype] drivers/scsi/bnx2i/bnx2i_hwi.c:1628:28: sparse: sparse: incorrect type in assignment (different base types) @@ expected restricted __be16 [usertype] t2retain @@ got restricted __be32 [usertype] @@ drivers/scsi/bnx2i/bnx2i_hwi.c:1628:28: sparse: expected restricted __be16 [usertype] t2retain drivers/scsi/bnx2i/bnx2i_hwi.c:1628:28: sparse: got restricted __be32 [usertype] drivers/scsi/bnx2i/bnx2i_hwi.c:1657:46: sparse: sparse: incorrect type in argument 2 (different base types) @@ expected restricted itt_t [usertype] @@ got int @@ drivers/scsi/bnx2i/bnx2i_hwi.c:1657:46: sparse: expected restricted itt_t [usertype] drivers/scsi/bnx2i/bnx2i_hwi.c:1657:46: sparse: got int drivers/scsi/bnx2i/bnx2i_hwi.c:1707:29: sparse: sparse: cast from restricted itt_t drivers/scsi/bnx2i/bnx2i_hwi.c:1716:27: sparse: sparse: cast to restricted itt_t drivers/scsi/bnx2i/bnx2i_hwi.c:1812:25: sparse: sparse: cast from restricted itt_t drivers/scsi/bnx2i/bnx2i_hwi.c:1812:25: sparse: sparse: incorrect type in argument 1 (different base types) @@ expected unsigned int [usertype] val @@ got restricted itt_t [usertype] @@ drivers/scsi/bnx2i/bnx2i_hwi.c:1812:25: sparse: expected unsigned int [usertype] val drivers/scsi/bnx2i/bnx2i_hwi.c:1812:25: sparse: got restricted itt_t [usertype] drivers/scsi/bnx2i/bnx2i_hwi.c:1812:25: sparse: sparse: cast from restricted itt_t drivers/scsi/bnx2i/bnx2i_hwi.c:1812:25: sparse: sparse: cast from restricted itt_t drivers/scsi/bnx2i/bnx2i_hwi.c:1812:25: sparse: sparse: cast from restricted itt_t drivers/scsi/bnx2i/bnx2i_hwi.c:1812:25: sparse: sparse: cast from restricted itt_t drivers/scsi/bnx2i/bnx2i_hwi.c:1837:44: sparse: sparse: incorrect type in argument 2 (different base types) @@ expected restricted itt_t [usertype] @@ got int @@ drivers/scsi/bnx2i/bnx2i_hwi.c:1837:44: sparse: expected restricted itt_t [usertype] drivers/scsi/bnx2i/bnx2i_hwi.c:1837:44: sparse: got int drivers/scsi/bnx2i/bnx2i_hwi.c:1909:43: sparse: sparse: incorrect type in argument 2 (different base types) @@ expected restricted itt_t [usertype] @@ got int @@ drivers/scsi/bnx2i/bnx2i_hwi.c:1909:43: sparse: expected restricted itt_t [usertype] drivers/scsi/bnx2i/bnx2i_hwi.c:1909:43: sparse: got int drivers/scsi/bnx2i/bnx2i_hwi.c:1979:44: sparse: sparse: cast from restricted itt_t vim +220 drivers/scsi/bnx2i/bnx2i_hwi.c cf4e6363859d30 Michael Chan 2009-06-08 208 cf4e6363859d30 Michael Chan 2009-06-08 209 cf4e6363859d30 Michael Chan 2009-06-08 210 static void bnx2i_ring_577xx_doorbell(struct bnx2i_conn *conn) cf4e6363859d30 Michael Chan 2009-06-08 211 { cf4e6363859d30 Michael Chan 2009-06-08 212 struct bnx2i_5771x_dbell dbell; cf4e6363859d30 Michael Chan 2009-06-08 213 u32 msg; cf4e6363859d30 Michael Chan 2009-06-08 214 cf4e6363859d30 Michael Chan 2009-06-08 215 memset(&dbell, 0, sizeof(dbell)); cf4e6363859d30 Michael Chan 2009-06-08 216 dbell.dbell.header = (B577XX_ISCSI_CONNECTION_TYPE << cf4e6363859d30 Michael Chan 2009-06-08 217 B577XX_DOORBELL_HDR_CONN_TYPE_SHIFT); cf4e6363859d30 Michael Chan 2009-06-08 218 msg = *((u32 *)&dbell); cf4e6363859d30 Michael Chan 2009-06-08 219 /* TODO : get doorbell register mapping */ cf4e6363859d30 Michael Chan 2009-06-08 @220 writel(cpu_to_le32(msg), conn->ep->qp.ctx_base); cf4e6363859d30 Michael Chan 2009-06-08 221 } cf4e6363859d30 Michael Chan 2009-06-08 222 :::::: The code at line 220 was first introduced by commit :::::: cf4e6363859d30f24f8cd3e8930dbff399cc3550 [SCSI] bnx2i: Add bnx2i iSCSI driver. :::::: TO: Michael Chan <mchan(a)broadcom.com&gt; :::::: CC: James Bottomley <James.Bottomley(a)HansenPartnership.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org