10:34 a.m.
On Fri, May 15, 2020 at 12:00:26PM -0700, Matthew Wilcox wrote:
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.
sorry, the reproduce
steps here is wrong, it is not for x86_64. We will
fix this.
>
> > 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(a)intel.com>
> >
> >
> > 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
>
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