linux-kernel - drivers/irqchip/irq-aspeed-scu-ic.c:107:27: warning: variable 'mask' set but not used

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Message-ID: <202602010957.9uuKqUkG-lkp@intel.com>
Date: Sun, 01 Feb 2026 09:50:43 +0800
From: kernel test robot <lkp@...el.com>
To: Ryan Chen <ryan_chen@...eedtech.com>
Cc: oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
 Thomas Gleixner <tglx@...utronix.de>
Subject: drivers/irqchip/irq-aspeed-scu-ic.c:107:27: warning:
 variable 'mask' set but not used

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   162b42445b585cd89f45475848845db353539605
commit: b2a0c13f8b4fc3f6c8b279fdc4395a5fa57dda5d irqchip/aspeed-scu-ic: Add support for AST2700 SCU interrupt controllers
date:   5 months ago
config: arm-allyesconfig (https://download.01.org/0day-ci/archive/20260201/202602010957.9uuKqUkG-lkp@intel.com/config)
compiler: arm-linux-gnueabi-gcc (GCC) 15.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260201/202602010957.9uuKqUkG-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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202602010957.9uuKqUkG-lkp@intel.com/

All warnings (new ones prefixed by >>):

   drivers/irqchip/irq-aspeed-scu-ic.c: In function 'aspeed_scu_ic_irq_handler_split':
>> drivers/irqchip/irq-aspeed-scu-ic.c:107:27: warning: variable 'mask' set but not used [-Wunused-but-set-variable]
     107 |         unsigned int sts, mask;
         |                           ^~~~


vim +/mask +107 drivers/irqchip/irq-aspeed-scu-ic.c

   101	
   102	static void aspeed_scu_ic_irq_handler_split(struct irq_desc *desc)
   103	{
   104		struct aspeed_scu_ic *scu_ic = irq_desc_get_handler_data(desc);
   105		struct irq_chip *chip = irq_desc_get_chip(desc);
   106		unsigned long bit, enabled, max, status;
 > 107		unsigned int sts, mask;
   108	
   109		chained_irq_enter(chip, desc);
   110	
   111		mask = scu_ic->irq_enable;
   112		sts = readl(scu_ic->base + scu_ic->isr);
   113		enabled = sts & scu_ic->irq_enable;
   114		sts = readl(scu_ic->base + scu_ic->isr);
   115		status = sts & enabled;
   116	
   117		bit = scu_ic->irq_shift;
   118		max = scu_ic->num_irqs + bit;
   119	
   120		for_each_set_bit_from(bit, &status, max) {
   121			generic_handle_domain_irq(scu_ic->irq_domain, bit - scu_ic->irq_shift);
   122			/* Clear interrupt */
   123			writel(BIT(bit), scu_ic->base + scu_ic->isr);
   124		}
   125	
   126		chained_irq_exit(chip, desc);
   127	}
   128	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki