Hi Huacai, I love your patch! Perhaps something to improve: [auto build test WARNING on tip/irq/core] [also build test WARNING on linux/master linus/master v5.15-rc5 next-20211011] [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] url: https://github.com/0day-ci/linux/commits/Huacai-Chen/irqchip-Add-LoongArc... base: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git b70e13885cf63b6f99cbd9a1dbb6beaa2622bf68 config: mips-loongson2k_defconfig (attached as .config) compiler: mips64el-linux-gcc (GCC) 11.2.0 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/0day-ci/linux/commit/2bea942946e85ba99a5ff261f18347f2b... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Huacai-Chen/irqchip-Add-LoongArch-related-irqchip-drivers/20211011-164738 git checkout 2bea942946e85ba99a5ff261f18347f2b36b8742 # save the attached .config to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=mips SHELL=/bin/bash drivers/irqchip/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): 149 | struct acpi_madt_lpc_pic *acpi_pchlpc) | ^~~~~~~~~~~~~~~~~ 148 | struct irq_domain *pch_lpc_acpi_init(struct irq_domain *parent, | ^~~~~~~~~~~~~~~~~ In file included from arch/mips/include/asm/mmiowb.h:5, from include/linux/spinlock.h:65, from include/linux/wait.h:9, from include/linux/pid.h:6, from include/linux/sched.h:14, from include/linux/hardirq.h:9, from include/linux/interrupt.h:11, from drivers/irqchip/irq-loongson-pch-lpc.c:10: drivers/irqchip/irq-loongson-pch-lpc.c: In function 'pch_lpc_acpi_init': drivers/irqchip/irq-loongson-pch-lpc.c:164:41: error: invalid use of undefined type 'struct acpi_madt_lpc_pic' 164 | priv->base = ioremap(acpi_pchlpc->address, acpi_pchlpc->size); | ^~ arch/mips/include/asm/io.h:180:23: note: in definition of macro 'ioremap' 180 | ioremap_prot((offset), (size), _CACHE_UNCACHED) | ^~~~~~ drivers/irqchip/irq-loongson-pch-lpc.c:164:63: error: invalid use of undefined type 'struct acpi_madt_lpc_pic' 164 | priv->base = ioremap(acpi_pchlpc->address, acpi_pchlpc->size); | ^~ arch/mips/include/asm/io.h:180:33: note: in definition of macro 'ioremap' 180 | ioremap_prot((offset), (size), _CACHE_UNCACHED) | ^~~~ drivers/irqchip/irq-loongson-pch-lpc.c:187:38: error: invalid use of undefined type 'struct acpi_madt_lpc_pic' 187 | fwspec.param[0] = acpi_pchlpc->cascade; | ^~ vim +149 drivers/irqchip/irq-loongson-pch-lpc.c 147 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org