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

[David Laight <david.laight.linux@gmail.com>]

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) ?

	David