Re: [PATCH v1 3/6] irqchip/gic-v3: support SGI broadcast

[kernel test robot <lkp@intel.com>]

Hi Yu,

kernel test robot noticed the following build warnings:

[auto build test WARNING on 42f7652d3eb527d03665b09edac47f85fb600924]

url:    https://github.com/intel-lab-lkp/linux/commits/Yu-Zhao/mm-hugetlb_vmemmap-batch-update-PTEs/20241021-122330
base:   42f7652d3eb527d03665b09edac47f85fb600924
patch link:    https://lore.kernel.org/r/20241021042218.746659-4-yuzhao%40google.com
patch subject: [PATCH v1 3/6] irqchip/gic-v3: support SGI broadcast
config: arm-defconfig (https://download.01.org/0day-ci/archive/20241022/202410221026.yJKHaGWA-lkp@intel.com/config)
compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project f28c006a5895fc0e329fe15fead81e37457cb1d1)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241022/202410221026.yJKHaGWA-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/202410221026.yJKHaGWA-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/irqchip/irq-gic-v3.c:1401:8: warning: shift count >= width of type [-Wshift-count-overflow]
           val = BIT(ICC_SGI1R_IRQ_ROUTING_MODE_BIT) | (irq << ICC_SGI1R_SGI_ID_SHIFT);
                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/vdso/bits.h:7:26: note: expanded from macro 'BIT'
   #define BIT(nr)                 (UL(1) << (nr))
                                          ^  ~~~~
   1 warning generated.


vim +1401 drivers/irqchip/irq-gic-v3.c

  1396	
  1397	static void gic_broadcast_sgi(unsigned int irq)
  1398	{
  1399		u64 val;
  1400	
> 1401		val = BIT(ICC_SGI1R_IRQ_ROUTING_MODE_BIT) | (irq << ICC_SGI1R_SGI_ID_SHIFT);
  1402	
  1403		pr_devel("CPU %d: broadcasting SGI %u\n", smp_processor_id(), irq);
  1404		gic_write_sgi1r(val);
  1405	}
  1406	

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