Re: [PATCH] pinctrl: mediatek: add eint new design for mt8196

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

Hi chang,

kernel test robot noticed the following build errors:

[auto build test ERROR on linusw-pinctrl/devel]
[also build test ERROR on linusw-pinctrl/for-next linus/master v6.12-rc4 next-20241025]
[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#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/chang-hao/pinctrl-mediatek-add-eint-new-design-for-mt8196/20241025-111952
base:   https://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl.git devel
patch link:    https://lore.kernel.org/r/20241025031814.21442-1-ot_chhao.chang%40mediatek.com
patch subject: [PATCH] pinctrl: mediatek: add eint new design for mt8196
config: s390-randconfig-r131-20241027 (https://download.01.org/0day-ci/archive/20241028/202410280230.KAMZK7aZ-lkp@intel.com/config)
compiler: clang version 15.0.7 (https://github.com/llvm/llvm-project 8dfdcc7b7bf66834a761bd8de445840ef68e4d1a)
reproduce: (https://download.01.org/0day-ci/archive/20241028/202410280230.KAMZK7aZ-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/202410280230.KAMZK7aZ-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from drivers/pinctrl/mediatek/mtk-eint.c:14:
   In file included from include/linux/gpio/driver.h:8:
   In file included from include/linux/irqchip/chained_irq.h:10:
   In file included from include/linux/irq.h:20:
   In file included from include/linux/io.h:14:
   In file included from arch/s390/include/asm/io.h:93:
   include/asm-generic/io.h:548:31: 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:561:61: 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:37:59: 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/pinctrl/mediatek/mtk-eint.c:14:
   In file included from include/linux/gpio/driver.h:8:
   In file included from include/linux/irqchip/chained_irq.h:10:
   In file included from include/linux/irq.h:20:
   In file included from include/linux/io.h:14:
   In file included from arch/s390/include/asm/io.h:93:
   include/asm-generic/io.h:574:61: 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:35:59: 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/pinctrl/mediatek/mtk-eint.c:14:
   In file included from include/linux/gpio/driver.h:8:
   In file included from include/linux/irqchip/chained_irq.h:10:
   In file included from include/linux/irq.h:20:
   In file included from include/linux/io.h:14:
   In file included from arch/s390/include/asm/io.h:93:
   include/asm-generic/io.h:585:33: 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:595:59: 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:605:59: 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:693:20: 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:701:20: 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:709:20: 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:718:21: 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:727:21: 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:736:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           writesl(PCI_IOBASE + addr, buffer, count);
                   ~~~~~~~~~~ ^
>> drivers/pinctrl/mediatek/mtk-eint.c:588:2: error: call to undeclared function 'dsb'; ISO C99 and later do not support implicit function declarations [-Werror,-Wimplicit-function-declaration]
           dsb(sy);
           ^
   drivers/pinctrl/mediatek/mtk-eint.c:588:6: error: use of undeclared identifier 'sy'
           dsb(sy);
               ^
   drivers/pinctrl/mediatek/mtk-eint.c:609:2: error: call to undeclared function 'dsb'; ISO C99 and later do not support implicit function declarations [-Werror,-Wimplicit-function-declaration]
           dsb(sy);
           ^
   drivers/pinctrl/mediatek/mtk-eint.c:609:6: error: use of undeclared identifier 'sy'
           dsb(sy);
               ^
   drivers/pinctrl/mediatek/mtk-eint.c:686:14: warning: no previous prototype for function 'mtk_eint_get_debounce_en' [-Wmissing-prototypes]
   unsigned int mtk_eint_get_debounce_en(struct mtk_eint *eint,
                ^
   drivers/pinctrl/mediatek/mtk-eint.c:686:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   unsigned int mtk_eint_get_debounce_en(struct mtk_eint *eint,
   ^
   static 
   drivers/pinctrl/mediatek/mtk-eint.c:709:14: warning: no previous prototype for function 'mtk_eint_get_debounce_value' [-Wmissing-prototypes]
   unsigned int mtk_eint_get_debounce_value(struct mtk_eint *eint,
                ^
   drivers/pinctrl/mediatek/mtk-eint.c:709:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   unsigned int mtk_eint_get_debounce_value(struct mtk_eint *eint,
   ^
   static 
   14 warnings and 4 errors generated.


vim +/dsb +588 drivers/pinctrl/mediatek/mtk-eint.c

   572	
   573	int mtk_eint_do_suspend(struct mtk_eint *eint)
   574	{
   575		unsigned int i, j, port;
   576	
   577		for (i = 0; i < eint->instance_number; i++) {
   578			struct mtk_eint_instance inst = eint->instances[i];
   579	
   580			for (j = 0; j < inst.number; j += MAX_BIT) {
   581				port = j >> REG_GROUP;
   582				writel_relaxed(~inst.wake_mask[port],
   583					       inst.base + port*REG_OFSET + eint->comp->regs->mask_set);
   584				writel_relaxed(inst.wake_mask[port],
   585					       inst.base + port*REG_OFSET + eint->comp->regs->mask_clr);
   586			}
   587		}
 > 588		dsb(sy);
   589	
   590		return 0;
   591	}
   592	EXPORT_SYMBOL_GPL(mtk_eint_do_suspend);
   593	

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