tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 2734d6c1b1a089fb593ef6a23d4b70903526fe0c commit: 005b73d0dd83c9cb9420a196bea8070cde30ecac m68knommu: __force type casts for raw IO access date: 12 months ago config: m68k-randconfig-s032-20210719 (attached as .config) compiler: m68k-linux-gcc (GCC) 10.3.0 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: v0.6.3-341-g8af24329-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 005b73d0dd83c9cb9420a196bea8070cde30ecac # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-10.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=m68k 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/spi/spi-orion.c:413:17: sparse: expected unsigned int volatile [usertype] drivers/spi/spi-orion.c:413:17: sparse: got restricted __le16 [usertype] drivers/spi/spi-orion.c:423:17: sparse: sparse: cast to restricted __le16 drivers/spi/spi-orion.c:423:17: sparse: sparse: cast to restricted __le16 drivers/spi/spi-orion.c:423:17: sparse: sparse: cast to restricted __le16 drivers/spi/spi-orion.c:423:17: sparse: sparse: cast to restricted __le16 drivers/spi/spi-orion.c:423:17: sparse: sparse: cast to restricted __le16 drivers/spi/spi-orion.c:423:17: sparse: sparse: cast to restricted __le16 drivers/spi/spi-orion.c:423:17: sparse: sparse: cast to restricted __le16 drivers/spi/spi-orion.c:423:17: sparse: sparse: cast to restricted __le16 drivers/spi/spi-orion.c:423:17: sparse: sparse: cast to restricted __le16 drivers/spi/spi-orion.c:423:17: sparse: sparse: cast to restricted __le16 drivers/spi/spi-orion.c:423:17: sparse: sparse: cast to restricted __le16 drivers/spi/spi-orion.c:423:17: sparse: sparse: cast to restricted __le16 drivers/spi/spi-orion.c:423:17: sparse: sparse: cast to restricted __le16 drivers/spi/spi-orion.c:423:17: sparse: sparse: cast to restricted __le16 drivers/spi/spi-orion.c:423:17: sparse: sparse: cast to restricted __le16 drivers/spi/spi-orion.c:423:17: sparse: sparse: cast to restricted __le16 vim +413 drivers/spi/spi-orion.c 60cadec9da7b6c drivers/spi/orion_spi.c Shadi Ammouri 2008-08-05 396 60cadec9da7b6c drivers/spi/orion_spi.c Shadi Ammouri 2008-08-05 397 static inline int 60cadec9da7b6c drivers/spi/orion_spi.c Shadi Ammouri 2008-08-05 398 orion_spi_write_read_16bit(struct spi_device *spi, 60cadec9da7b6c drivers/spi/orion_spi.c Shadi Ammouri 2008-08-05 399 const u16 **tx_buf, u16 **rx_buf) 60cadec9da7b6c drivers/spi/orion_spi.c Shadi Ammouri 2008-08-05 400 { 60cadec9da7b6c drivers/spi/orion_spi.c Shadi Ammouri 2008-08-05 401 void __iomem *tx_reg, *rx_reg, *int_reg; 60cadec9da7b6c drivers/spi/orion_spi.c Shadi Ammouri 2008-08-05 402 struct orion_spi *orion_spi; 60cadec9da7b6c drivers/spi/orion_spi.c Shadi Ammouri 2008-08-05 403 60cadec9da7b6c drivers/spi/orion_spi.c Shadi Ammouri 2008-08-05 404 orion_spi = spi_master_get_devdata(spi->master); 60cadec9da7b6c drivers/spi/orion_spi.c Shadi Ammouri 2008-08-05 405 tx_reg = spi_reg(orion_spi, ORION_SPI_DATA_OUT_REG); 60cadec9da7b6c drivers/spi/orion_spi.c Shadi Ammouri 2008-08-05 406 rx_reg = spi_reg(orion_spi, ORION_SPI_DATA_IN_REG); 60cadec9da7b6c drivers/spi/orion_spi.c Shadi Ammouri 2008-08-05 407 int_reg = spi_reg(orion_spi, ORION_SPI_INT_CAUSE_REG); 60cadec9da7b6c drivers/spi/orion_spi.c Shadi Ammouri 2008-08-05 408 60cadec9da7b6c drivers/spi/orion_spi.c Shadi Ammouri 2008-08-05 409 /* clear the interrupt cause register */ 60cadec9da7b6c drivers/spi/orion_spi.c Shadi Ammouri 2008-08-05 410 writel(0x0, int_reg); 60cadec9da7b6c drivers/spi/orion_spi.c Shadi Ammouri 2008-08-05 411 60cadec9da7b6c drivers/spi/orion_spi.c Shadi Ammouri 2008-08-05 412 if (tx_buf && *tx_buf) 60cadec9da7b6c drivers/spi/orion_spi.c Shadi Ammouri 2008-08-05 @413 writel(__cpu_to_le16(get_unaligned((*tx_buf)++)), tx_reg); 60cadec9da7b6c drivers/spi/orion_spi.c Shadi Ammouri 2008-08-05 414 else 60cadec9da7b6c drivers/spi/orion_spi.c Shadi Ammouri 2008-08-05 415 writel(0, tx_reg); 60cadec9da7b6c drivers/spi/orion_spi.c Shadi Ammouri 2008-08-05 416 60cadec9da7b6c drivers/spi/orion_spi.c Shadi Ammouri 2008-08-05 417 if (orion_spi_wait_till_ready(orion_spi) < 0) { 60cadec9da7b6c drivers/spi/orion_spi.c Shadi Ammouri 2008-08-05 418 dev_err(&spi->dev, "TXS timed out\n"); 60cadec9da7b6c drivers/spi/orion_spi.c Shadi Ammouri 2008-08-05 419 return -1; 60cadec9da7b6c drivers/spi/orion_spi.c Shadi Ammouri 2008-08-05 420 } 60cadec9da7b6c drivers/spi/orion_spi.c Shadi Ammouri 2008-08-05 421 60cadec9da7b6c drivers/spi/orion_spi.c Shadi Ammouri 2008-08-05 422 if (rx_buf && *rx_buf) 60cadec9da7b6c drivers/spi/orion_spi.c Shadi Ammouri 2008-08-05 423 put_unaligned(__le16_to_cpu(readl(rx_reg)), (*rx_buf)++); 60cadec9da7b6c drivers/spi/orion_spi.c Shadi Ammouri 2008-08-05 424 60cadec9da7b6c drivers/spi/orion_spi.c Shadi Ammouri 2008-08-05 425 return 1; 60cadec9da7b6c drivers/spi/orion_spi.c Shadi Ammouri 2008-08-05 426 } 60cadec9da7b6c drivers/spi/orion_spi.c Shadi Ammouri 2008-08-05 427 :::::: The code at line 413 was first introduced by commit :::::: 60cadec9da7b6c91aca51f408c828f7e74a68379 spi: new orion_spi driver :::::: TO: Shadi Ammouri <shadi(a)marvell.com&gt; :::::: CC: Linus Torvalds <torvalds(a)linux-foundation.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org