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

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Message-ID: <aXLOELiIG8MHKcIO@rli9-mobl>
Date: Fri, 23 Jan 2026 09:25:36 +0800
From: Philip Li <philip.li@...el.com>
To: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
CC: David Laight <david.laight.linux@...il.com>, kernel test robot
	<lkp@...el.com>, Nathan Chancellor <nathan@...nel.org>, Greg Kroah-Hartman
	<gregkh@...uxfoundation.org>, Thomas Gleixner <tglx@...utronix.de>, "Peter
 Zijlstra" <peterz@...radead.org>, Ingo Molnar <mingo@...nel.org>, "Mathieu
 Desnoyers" <mathieu.desnoyers@...icios.com>, Arnd Bergmann <arnd@...db.de>,
	<linux-arch@...r.kernel.org>, <linux-kernel@...r.kernel.org>, Yury Norov
	<yury.norov@...il.com>, Jani Nikula <jani.nikula@...el.com>, Vincent Mailhol
	<mailhol.vincent@...adoo.fr>, Kees Cook <keescook@...omium.org>, "Andrew
 Morton" <akpm@...ux-foundation.org>, <oe-kbuild-all@...ts.linux.dev>, "Linux
 Memory Management List" <linux-mm@...ck.org>
Subject: Re: [PATCH next 11/14] bit: Strengthen compile-time tests in
 GENMASK() and BIT()

On Thu, Jan 22, 2026 at 04:26:44PM +0200, Andy Shevchenko wrote:
> 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@...el.com> wrote:
> 
> > > 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) ?
> 
> First of all, the LKP should install the fork of sparse by Al Viro. That will
> fix tons of warnings that are related to modules and speed up the process
> itself.

Thanks Andy, i will switch to the repo from Al Viro for sparse.

> 
> -- 
> With Best Regards,
> Andy Shevchenko
> 
>