tree:   https://github.com/Xilinx/linux-xlnx xlnx_rebase_v5.10
head:   bf98c1493fb23bfd7e2678498b7e337ce2cd1d53
commit: b0c3669ae8f124715469bae21ac86b25f3c48cf6 [1363/1760] uio: Add the UIO driver for AI engine
config: arm-randconfig-r016-20210812 (attached as .config)
compiler: arm-linux-gnueabi-gcc (GCC) 10.3.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/Xilinx/linux-xlnx/commit/b0c3669ae8f124715469bae21ac86b25f3c48cf6
        git remote add xlnx https://github.com/Xilinx/linux-xlnx
        git fetch --no-tags xlnx xlnx_rebase_v5.10
        git checkout b0c3669ae8f124715469bae21ac86b25f3c48cf6
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-10.3.0 make.cross ARCH=arm 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

   drivers/uio/uio_xilinx_ai_engine.c: In function 'xilinx_ai_engine_debugfs_write':
>> drivers/uio/uio_xilinx_ai_engine.c:39:6: warning: variable 'irq' set but not used [-Wunused-but-set-variable]
      39 |  int irq, ret;
         |      ^~~


vim +/irq +39 drivers/uio/uio_xilinx_ai_engine.c

    33	
    34	static ssize_t xilinx_ai_engine_debugfs_write(struct file *f,
    35						      const char __user *buf,
    36						      size_t size, loff_t *pos)
    37	{
    38		struct irq_domain *irq_sim_domain = file_inode(f)->i_private;
  > 39		int irq, ret;
    40	
    41		irq = irq_find_mapping(irq_sim_domain, 1);
    42		ret = irq_set_irqchip_state(1, IRQCHIP_STATE_PENDING, true);
    43		if (ret)
    44			return ret;
    45	
    46		return size;
    47	}
    48	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org