[PATCH v2] coresight: Make current W=1 warnings default

[kernel test robot]

Hi James,

kernel test robot noticed the following build warnings:

[auto build test WARNING on atorgue-stm32/stm32-next]
[also build test WARNING on linus/master v6.7-rc4 next-20231204]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/James-Clark/coresight-Make-current-W-1-warnings-default/20231116-004818
base:   https://git.kernel.org/pub/scm/linux/kernel/git/atorgue/stm32.git stm32-next
patch link:    https://lore.kernel.org/r/20231115162834.355598-1-james.clark%40arm.com
patch subject: [PATCH v2] coresight: Make current W=1 warnings default
config: arm-randconfig-r131-20231117 (https://download.01.org/0day-ci/archive/20231205/202312050158.FKpxuafP-lkp@intel.com/config)
compiler: arm-linux-gnueabi-gcc (GCC) 13.2.0
reproduce: (https://download.01.org/0day-ci/archive/20231205/202312050158.FKpxuafP-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 at intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202312050158.FKpxuafP-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> drivers/hwtracing/coresight/coresight-etb10.c:840:17: sparse: sparse: Using plain integer as NULL pointer
   drivers/hwtracing/coresight/coresight-etb10.c: note: in included file (through include/linux/mmzone.h, include/linux/gfp.h, include/linux/xarray.h, ...):
   include/linux/page-flags.h:242:46: sparse: sparse: self-comparison always evaluates to false
--
>> drivers/hwtracing/coresight/coresight-funnel.c:395:17: sparse: sparse: Using plain integer as NULL pointer
   drivers/hwtracing/coresight/coresight-funnel.c: note: in included file (through include/linux/mmzone.h, include/linux/gfp.h, include/linux/slab.h, ...):
   include/linux/page-flags.h:242:46: sparse: sparse: self-comparison always evaluates to false
--
>> drivers/hwtracing/coresight/coresight-tpdm.c:242:17: sparse: sparse: Using plain integer as NULL pointer
   drivers/hwtracing/coresight/coresight-tpdm.c: note: in included file (through include/linux/mmzone.h, include/linux/gfp.h, include/linux/xarray.h, ...):
   include/linux/page-flags.h:242:46: sparse: sparse: self-comparison always evaluates to false

vim +840 drivers/hwtracing/coresight/coresight-etb10.c

   834	
   835	static const struct amba_id etb_ids[] = {
   836		{
   837			.id	= 0x000bb907,
   838			.mask	= 0x000fffff,
   839		},
 > 840		{ 0, 0, 0 },
   841	};
   842	

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