Re: [PATCH v8 01/14] Consolidate IO memcpy/memset into iomap_copy.c

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

Hi Julian,

kernel test robot noticed the following build errors:

[auto build test ERROR on powerpc/next]
[also build test ERROR on powerpc/fixes arm64/for-next/core deller-parisc/for-next s390/features mtd/mtd/next mtd/mtd/fixes linus/master arm/for-next arm/fixes v6.12-rc2 next-20241008]
[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/Julian-Vetter/Consolidate-IO-memcpy-memset-into-iomap_copy-c/20241008-163134
base:   https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next
patch link:    https://lore.kernel.org/r/20241008075023.3052370-2-jvetter%40kalrayinc.com
patch subject: [PATCH v8 01/14] Consolidate IO memcpy/memset into iomap_copy.c
config: hexagon-allmodconfig (https://download.01.org/0day-ci/archive/20241009/202410091134.mtrlor1I-lkp@intel.com/config)
compiler: clang version 20.0.0git (https://github.com/llvm/llvm-project 70e0a7e7e6a8541bcc46908c592eed561850e416)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241009/202410091134.mtrlor1I-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/202410091134.mtrlor1I-lkp@intel.com/

All errors (new ones prefixed by >>):

   WARNING: unmet direct dependencies detected for GET_FREE_REGION
   Depends on [n]: SPARSEMEM [=n]
   Selected by [m]:
   - RESOURCE_KUNIT_TEST [=m] && RUNTIME_TESTING_MENU [=y] && KUNIT [=m]
   In file included from arch/hexagon/kernel/asm-offsets.c:15:
   In file included from include/linux/interrupt.h:11:
   In file included from include/linux/hardirq.h:11:
   In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1:
   In file included from include/asm-generic/hardirq.h:17:
   In file included from include/linux/irq.h:20:
   In file included from include/linux/io.h:14:
   In file included from arch/hexagon/include/asm/io.h:328:
>> include/asm-generic/io.h:105:13: error: conflicting types for 'memcpy_fromio'
   105 | extern void memcpy_fromio(void *to, const volatile void __iomem *from,
   |             ^
   arch/hexagon/include/asm/io.h:314:23: note: expanded from macro 'memcpy_fromio'
   314 | #define memcpy_fromio memcpy_fromio
   |                       ^
   arch/hexagon/include/asm/io.h:173:20: note: previous definition is here
   173 | static inline void memcpy_fromio(void *dst, const volatile void __iomem *src,
   |                    ^
   In file included from arch/hexagon/kernel/asm-offsets.c:15:
   In file included from include/linux/interrupt.h:11:
   In file included from include/linux/hardirq.h:11:
   In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1:
   In file included from include/asm-generic/hardirq.h:17:
   In file included from include/linux/irq.h:20:
   In file included from include/linux/io.h:14:
   In file included from arch/hexagon/include/asm/io.h:328:
>> include/asm-generic/io.h:107:13: error: conflicting types for 'memcpy_toio'
   107 | extern void memcpy_toio(volatile void __iomem *to, const void *from,
   |             ^
   arch/hexagon/include/asm/io.h:315:21: note: expanded from macro 'memcpy_toio'
   315 | #define memcpy_toio memcpy_toio
   |                     ^
   arch/hexagon/include/asm/io.h:179:20: note: previous definition is here
   179 | static inline void memcpy_toio(volatile void __iomem *dst, const void *src,
   |                    ^
   In file included from arch/hexagon/kernel/asm-offsets.c:15:
   In file included from include/linux/interrupt.h:11:
   In file included from include/linux/hardirq.h:11:
   In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1:
   In file included from include/asm-generic/hardirq.h:17:
   In file included from include/linux/irq.h:20:
   In file included from include/linux/io.h:14:
   In file included from arch/hexagon/include/asm/io.h:328:
   include/asm-generic/io.h:554:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
   554 |         val = __raw_readb(PCI_IOBASE + addr);
   |                           ~~~~~~~~~~ ^
   include/asm-generic/io.h:567:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
   567 |         val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
   |                                                         ~~~~~~~~~~ ^
   include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
   37 | #define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
   |                                                   ^
   In file included from arch/hexagon/kernel/asm-offsets.c:15:
   In file included from include/linux/interrupt.h:11:
   In file included from include/linux/hardirq.h:11:
   In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1:
   In file included from include/asm-generic/hardirq.h:17:
   In file included from include/linux/irq.h:20:
   In file included from include/linux/io.h:14:
   In file included from arch/hexagon/include/asm/io.h:328:
   include/asm-generic/io.h:580:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
   580 |         val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
   |                                                         ~~~~~~~~~~ ^
   include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
   35 | #define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
   |                                                   ^
   In file included from arch/hexagon/kernel/asm-offsets.c:15:
   In file included from include/linux/interrupt.h:11:
   In file included from include/linux/hardirq.h:11:
   In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1:
   In file included from include/asm-generic/hardirq.h:17:
   In file included from include/linux/irq.h:20:
   In file included from include/linux/io.h:14:
   In file included from arch/hexagon/include/asm/io.h:328:
   include/asm-generic/io.h:591:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
   591 |         __raw_writeb(value, PCI_IOBASE + addr);
   |                             ~~~~~~~~~~ ^
   include/asm-generic/io.h:601:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
   601 |         __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
   |                                                       ~~~~~~~~~~ ^
   include/asm-generic/io.h:611:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
   611 |         __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
   |                                                       ~~~~~~~~~~ ^
   6 warnings and 2 errors generated.
   make[3]: *** [scripts/Makefile.build:102: arch/hexagon/kernel/asm-offsets.s] Error 1
   make[3]: Target 'prepare' not remade because of errors.
   make[2]: *** [Makefile:1203: prepare0] Error 2
   make[2]: Target 'prepare' not remade because of errors.
   make[1]: *** [Makefile:224: __sub-make] Error 2
   make[1]: Target 'prepare' not remade because of errors.
   make: *** [Makefile:224: __sub-make] Error 2
   make: Target 'prepare' not remade because of errors.

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for MODVERSIONS
   Depends on [n]: MODULES [=y] && !COMPILE_TEST [=y]
   Selected by [y]:
   - RANDSTRUCT_FULL [=y] && (CC_HAS_RANDSTRUCT [=y] || GCC_PLUGINS [=n]) && MODULES [=y]
   WARNING: unmet direct dependencies detected for GET_FREE_REGION
   Depends on [n]: SPARSEMEM [=n]
   Selected by [m]:
   - RESOURCE_KUNIT_TEST [=m] && RUNTIME_TESTING_MENU [=y] && KUNIT [=m]


vim +/memcpy_fromio +105 include/asm-generic/io.h

   104	
 > 105	extern void memcpy_fromio(void *to, const volatile void __iomem *from,
   106				  size_t count);
 > 107	extern void memcpy_toio(volatile void __iomem *to, const void *from,
   108				size_t count);
   109	extern void memset_io(volatile void __iomem *dst, int c, size_t count);
   110	

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