[conor:qwip 10/15] drivers/irqchip/irq-mpfs-mux.c:215:6: warning: variable 'mask' set but not used

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

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/conor/linux.git qwip
head:   520f2563214599bc3abdd1aa6f127f67e084e65f
commit: c0ea499b12c76ccd8bceafc3ee52ba5655125837 [10/15] irqchip: add mpfs gpio interrupt mux
config: riscv-defconfig (https://download.01.org/0day-ci/archive/20240510/202405100628.xntHTI5e-lkp@intel.com/config)
compiler: clang version 19.0.0git (https://github.com/llvm/llvm-project b910bebc300dafb30569cecc3017b446ea8eafa0)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240510/202405100628.xntHTI5e-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/202405100628.xntHTI5e-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from drivers/irqchip/irq-mpfs-mux.c:11:
   In file included from include/linux/interrupt.h:21:
   In file included from arch/riscv/include/asm/sections.h:9:
   In file included from include/linux/mm.h:2208:
   include/linux/vmstat.h:522:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
     522 |         return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
         |                               ~~~~~~~~~~~ ^ ~~~
>> drivers/irqchip/irq-mpfs-mux.c:215:6: warning: variable 'mask' set but not used [-Wunused-but-set-variable]
     215 |         u64 mask;
         |             ^
   2 warnings generated.


vim +/mask +215 drivers/irqchip/irq-mpfs-mux.c

   207	
   208	static int mpfs_irq_mux_alloc(struct irq_domain *d, unsigned int virq,
   209				      unsigned int nr_irqs, void *arg)
   210	{
   211		struct mpfs_irq_mux *priv = d->host_data;
   212		struct irq_fwspec *fwspec = arg;
   213		struct irq_fwspec parent_fwspec;
   214		unsigned int bank, line, irq;
 > 215		u64 mask;
   216	
   217		if (!mpfs_irq_mux_is_direct(priv, fwspec))
   218			return mpfs_irq_mux_nondirect_alloc(d, virq, fwspec, priv);
   219	
   220		bank = fwspec->param[0] / MPFS_MAX_IRQS_PER_GPIO;
   221		line = fwspec->param[0] % MPFS_MAX_IRQS_PER_GPIO;
   222		mask = mpfs_irq_mux_bank_configs[bank].mask;
   223		irq = line + mpfs_irq_mux_bank_configs[bank].shift;
   224	
   225		parent_fwspec.fwnode = d->parent->fwnode;
   226		parent_fwspec.param[0] = priv->parent_irqs[irq];
   227		parent_fwspec.param_count = 1;
   228	
   229		irq_domain_set_hwirq_and_chip(d, virq, fwspec->param[0], &mpfs_irq_mux_irq_chip, priv);
   230	
   231		return irq_domain_alloc_irqs_parent(d, virq, 1, &parent_fwspec);
   232	}
   233	

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