tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 2dac75696c6da3c848daa118a729827541c89d33 commit: c7db3832ff19a9a1116c1b3d435c9db165a2f2f8 [9303/13299] m68k: io: Mark mmio read addresses as const config: m68k-allyesconfig (https://download.01.org/0day-ci/archive/20231019/202310190741.mbPtQRpD-lkp@xxxxxxxxx/config) compiler: m68k-linux-gcc (GCC) 13.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231019/202310190741.mbPtQRpD-lkp@xxxxxxxxx/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202310190741.mbPtQRpD-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): In file included from arch/m68k/include/asm/io_mm.h:25, from arch/m68k/include/asm/io.h:8, from include/linux/io.h:13, from drivers/hwmon/pc87427.c:31: drivers/hwmon/pc87427.c: In function 'pc87427_readall_pwm': >> arch/m68k/include/asm/raw_io.h:20:18: warning: array subscript 0 is outside array bounds of 'const volatile u8[0]' {aka 'const volatile unsigned char[]'} [-Warray-bounds=] 20 | ({ u8 __v = (*(__force const volatile u8 *) (unsigned long)(addr)); __v; }) | ~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/m68k/include/asm/io_mm.h:345:62: note: in expansion of macro 'in_8' 345 | #define inb(port) ((port) < 1024 ? isa_rom_inb(port) : in_8(port)) | ^~~~ drivers/hwmon/pc87427.c:244:32: note: in expansion of macro 'inb' 244 | data->pwm_enable[nr] = inb(iobase + PC87427_REG_PWM_ENABLE); | ^~~ cc1: note: source object is likely at address zero vim +20 arch/m68k/include/asm/raw_io.h 15 16 /* ++roman: The assignments to temp. vars avoid that gcc sometimes generates 17 * two accesses to memory, which may be undesirable for some devices. 18 */ 19 #define in_8(addr) \ > 20 ({ u8 __v = (*(__force const volatile u8 *) (unsigned long)(addr)); __v; }) 21 #define in_be16(addr) \ 22 ({ u16 __v = (*(__force const volatile u16 *) (unsigned long)(addr)); __v; }) 23 #define in_be32(addr) \ 24 ({ u32 __v = (*(__force const volatile u32 *) (unsigned long)(addr)); __v; }) 25 #define in_le16(addr) \ 26 ({ u16 __v = le16_to_cpu(*(__force const volatile __le16 *) (unsigned long)(addr)); __v; }) 27 #define in_le32(addr) \ 28 ({ u32 __v = le32_to_cpu(*(__force const volatile __le32 *) (unsigned long)(addr)); __v; }) 29 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
