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Date:   Sun, 17 Jul 2022 07:46:14 +0100
From:   Chris Down <chris@chrisdown.name>
To:     kernel test robot <lkp@intel.com>
Cc:     kbuild-all@lists.01.org, linux-kernel@vger.kernel.org,
        Petr Mladek <pmladek@suse.com>
Subject: Re: arch/parisc/math-emu/driver.c:88:17: sparse: sparse: Using plain
 integer as NULL pointer
Message-ID: <YtOwNiF1JJK544bN@chrisdown.name>
References: <202207171242.NdWlnOID-lkp@intel.com>
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The real issue is this:

     ../arch/parisc/math-emu/decode_exc.c: In function 'decode_fpu':
     ../arch/parisc/math-emu/decode_exc.c:49:25: error: expected identifier before numeric constant
        49 | #define fmt             11      /* bits 19 & 20 */
           |                         ^~
     ../include/linux/printk.h:391:34: note: in expansion of macro 'fmt'
       391 |                                 .fmt = __builtin_constant_p(_fmt) ? (_fmt) : NULL, \

And that's why you don't define such shortly named, ambiguous macros. The 
simplest fix is probably just to have this file and others like it use _printk.

I'll send a patch and cc linux-parisc.