tree: https://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms.git irq/domain_cleanup head: 6c1d2ff6977626ba56bd0ee4d04b955bf06a2032 commit: a9e69bee36a8712077e2d6f66108428a2f18e1a4 [23/25] irqchip: Bulk conversion to generic_handle_domain_irq() config: s390-randconfig-r021-20210514 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 425781bce01f2f1d5f553d3b2bf9ebbd6e15068c) 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 # install s390 cross compiling tool for clang build # apt-get install binutils-s390x-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms.git/com... git remote add arm-platforms https://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms.git git fetch --no-tags arm-platforms irq/domain_cleanup git checkout a9e69bee36a8712077e2d6f66108428a2f18e1a4 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=s390 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): In file included from drivers/irqchip/irq-ingenic-tcu.c:9: In file included from include/linux/irqchip.h:14: In file included from include/linux/acpi.h:13: In file included from include/linux/irqdomain.h:34: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/s390/include/asm/io.h:75: include/asm-generic/io.h:464:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __raw_readb(PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:477:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr)); ~~~~~~~~~~ ^ include/uapi/linux/byteorder/big_endian.h:36:59: note: expanded from macro '__le16_to_cpu' #define __le16_to_cpu(x) __swab16((__force __u16)(__le16)(x)) ^ include/uapi/linux/swab.h:102:54: note: expanded from macro '__swab16' #define __swab16(x) (__u16)__builtin_bswap16((__u16)(x)) ^ In file included from drivers/irqchip/irq-ingenic-tcu.c:9: In file included from include/linux/irqchip.h:14: In file included from include/linux/acpi.h:13: In file included from include/linux/irqdomain.h:34: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/s390/include/asm/io.h:75: include/asm-generic/io.h:490:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr)); ~~~~~~~~~~ ^ include/uapi/linux/byteorder/big_endian.h:34:59: note: expanded from macro '__le32_to_cpu' #define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x)) ^ include/uapi/linux/swab.h:115:54: note: expanded from macro '__swab32' #define __swab32(x) (__u32)__builtin_bswap32((__u32)(x)) ^ In file included from drivers/irqchip/irq-ingenic-tcu.c:9: In file included from include/linux/irqchip.h:14: In file included from include/linux/acpi.h:13: In file included from include/linux/irqdomain.h:34: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/s390/include/asm/io.h:75: include/asm-generic/io.h:501:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writeb(value, PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:511:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:521:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:609:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] readsb(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:617:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] readsw(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:625:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] readsl(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:634:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] writesb(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:643:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] writesw(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:652:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] writesl(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ generic_handle_domain_irq(domain, i); ^ drivers/irqchip/irq-ingenic-tcu.c:41:3: note: did you mean 'generic_handle_irq'? include/linux/irqdesc.h:162:5: note: 'generic_handle_irq' declared here int generic_handle_irq(unsigned int irq); ^ 12 warnings and 1 error generated. vim +/generic_handle_domain_irq +41 drivers/irqchip/irq-ingenic-tcu.c 23 24 static void ingenic_tcu_intc_cascade(struct irq_desc *desc) 25 { 26 struct irq_chip *irq_chip = irq_data_get_irq_chip(&desc->irq_data); 27 struct irq_domain *domain = irq_desc_get_handler_data(desc); 28 struct irq_chip_generic *gc = irq_get_domain_generic_chip(domain, 0); 29 struct regmap *map = gc->private; 30 uint32_t irq_reg, irq_mask; 31 unsigned int i; 32 33 regmap_read(map, TCU_REG_TFR, &irq_reg); 34 regmap_read(map, TCU_REG_TMR, &irq_mask); 35 36 chained_irq_enter(irq_chip, desc); 37 38 irq_reg &= ~irq_mask; 39 40 for_each_set_bit(i, (unsigned long *)&irq_reg, 32) 42 43 chained_irq_exit(irq_chip, desc); 44 } 45 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org