On Sat, May 16, 2020 at 02:20:38AM +0800, kbuild test robot wrote: > tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master > head: 051e6b7e34b9bd24f46725f74994a4d3a653966e > commit: 06e85c7e9a1c1356038936566fc23f7c0d363b96 asm-generic: fix unistd_32.h generation format > date: 5 weeks ago I don't see how that commit in any way reflects this error message. > reproduce: > # apt-get install sparse > # sparse version: v0.6.1-193-gb8fad4bc-dirty > git checkout 06e85c7e9a1c1356038936566fc23f7c0d363b96 > make ARCH=x86_64 allmodconfig I can't even see a way to build the ncr53c8xx module with this config. Unless somebody reenabled EISA on x86, the only way I can see to still build this driver is on PA-RISC with the ZALON code. > make C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' > > If you fix the issue, kindly add following tag as appropriate > Reported-by: kbuild test robot <lkp@xxxxxxxxx> > > > sparse warnings: (new ones prefixed by >>) > > >> drivers/scsi/ncr53c8xx.c:5306:9: sparse: sparse: cast truncates bits from constant value (58f becomes 8f) > > ^1da177e4c3f41 Linus Torvalds 2005-04-16 @5306 OUTW (nc_sien , STO|HTH|MA|SGE|UDC|RST|PAR); This seems entirely intentional. Something like this should do the job (whitespace damaged): +++ b/drivers/scsi/ncr53c8xx.h @@ -407,7 +407,7 @@ #ifdef CONFIG_SCSI_NCR53C8XX_NO_WORD_TRANSFERS /* Only 8 or 32 bit transfers allowed */ -#define OUTW_OFF(o, val) do { writeb((char)((val) >> 8), (char __iomem *)np->reg + ncr_offw(o)); writeb((char)(val), (char __iomem *)np->reg + ncr_offw(o) + 1); } while (0) +#define OUTW_OFF(o, val) do { writeb((char)((val) >> 8), (char __iomem *)np->reg + ncr_offw(o)); writeb((char)((val) & 0xff), (char __iomem *)np->reg + ncr_offw(o) + 1); } while (0) #else #define OUTW_OFF(o, val) writew_raw((val), (char __iomem *)np->reg + ncr_offw(o)) #endif
