Re: [PATCH next 11/14] bit: Strengthen compile-time tests in GENMASK() and BIT()

[Philip Li <philip.li@intel.com>]

On Thu, Jan 22, 2026 at 10:33:37AM +0000, David Laight wrote:
> On Thu, 22 Jan 2026 12:41:22 +0800
> kernel test robot <lkp@intel.com> wrote:
> 
> > Hi,
> > 
> > kernel test robot noticed the following build warnings:
> > 
> > [auto build test WARNING on next-20260120]
> > 
> > url:    https://github.com/intel-lab-lkp/linux/commits/david-laight-linux-gmail-com/overflow-Reduce-expansion-of-__type_max/20260122-013456
> > base:   next-20260120
> > patch link:    https://lore.kernel.org/r/20260121145731.3623-12-david.laight.linux%40gmail.com
> > patch subject: [PATCH next 11/14] bit: Strengthen compile-time tests in GENMASK() and BIT()
> > config: mips-randconfig-r132-20260122 (https://download.01.org/0day-ci/archive/20260122/202601221237.soiAkwkN-lkp@intel.com/config)
> > compiler: mips64-linux-gcc (GCC) 10.5.0
> > reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260122/202601221237.soiAkwkN-lkp@intel.com/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@intel.com>
> > | Closes: https://lore.kernel.org/oe-kbuild-all/202601221237.soiAkwkN-lkp@intel.com/
> > 
> > sparse warnings: (new ones prefixed by >>)
> >    kernel/kthread.c: note: in included file (through include/linux/bitmap.h, include/linux/cpumask.h, arch/mips/include/asm/processor.h, ...):
> > >> include/linux/find.h:209:45: sparse: sparse: Variable length array is used.  
> 
> Can we stop sparse complaining about sizeof(VLA) ?

Got it, we will avoid the direct report this 'sparse: Variable length array is used' warning.

> 
> 	David
>