Re: [linux-next:master] BUILD REGRESSION 736ee37e2e8eed7fe48d0a37ee5a709514d478b3

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On Wed, 18 May 2022 20:41:27 -0700 Guenter Roeck <linux@xxxxxxxxxxxx> wrote:

> On 5/18/22 17:55, kernel test robot wrote:
> > tree/branch: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
> > branch HEAD: 736ee37e2e8eed7fe48d0a37ee5a709514d478b3  Add linux-next specific files for 20220518
> > 
> > Error/Warning reports:
> > 
> > https://lore.kernel.org/linux-mm/202204291924.vTGZmerI-lkp@xxxxxxxxx
> > https://lore.kernel.org/linux-mm/202205041248.WgCwPcEV-lkp@xxxxxxxxx
> > https://lore.kernel.org/linux-mm/202205122113.uLKzd3SZ-lkp@xxxxxxxxx
> > https://lore.kernel.org/linux-mm/202205172344.3GFeaum1-lkp@xxxxxxxxx
> > https://lore.kernel.org/linux-mm/202205190527.o9wVEvHI-lkp@xxxxxxxxx
> > 
> > Error/Warning: (recently discovered and may have been fixed)
> > 
> [ .. ]
> > drivers/hwmon/nct6775-platform.c:199:9: sparse:    unsigned char
> > drivers/hwmon/nct6775-platform.c:199:9: sparse:    void
> 
> This is getting tiresome. Every driver using outb() on m68k will
> experience that "problem". As far as I can see, it is caused by
> 
> #define out_8(addr,b) (void)((*(__force volatile u8 *) (unsigned long)(addr)) = (b))
> 
> in arch/m68k/include/asm/raw_io.h. I have no idea what the
> "(void)" is for, but removing it "fixes" the problem.
> Either case, this is not a problem with the nct6775 driver,
> nor is it a new problem.

(cc Geert)



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