[esmil:jh7100-dmapool 19/39] arch/hexagon/kernel/dma.c:24:2: error: call to undeclared function 'hexagon_flush_dcache_range'; ISO C99 and later do not support implicit function declarations

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

tree:   https://github.com/esmil/linux jh7100-dmapool
head:   41d6f3f3b3698aab55a40592597677c448a7093a
commit: 801f1883c4bb70cc8c7725b85e220adc36a77a94 [19/39] dma-mapping: replace custom code with generic implementation
config: hexagon-randconfig-r016-20230620 (https://download.01.org/0day-ci/archive/20230621/202306210901.C8pP4HB5-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project.git 4a5ac14ee968ff0ad5d2cc1ffa0299048db4c88a)
reproduce: (https://download.01.org/0day-ci/archive/20230621/202306210901.C8pP4HB5-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/202306210901.C8pP4HB5-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from arch/hexagon/kernel/dma.c:8:
   In file included from include/linux/dma-map-ops.h:9:
   In file included from include/linux/dma-mapping.h:10:
   In file included from include/linux/scatterlist.h:9:
   In file included from arch/hexagon/include/asm/io.h:334:
   include/asm-generic/io.h:547:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     547 |         val = __raw_readb(PCI_IOBASE + addr);
         |                           ~~~~~~~~~~ ^
   include/asm-generic/io.h:560:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     560 |         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/dma.c:8:
   In file included from include/linux/dma-map-ops.h:9:
   In file included from include/linux/dma-mapping.h:10:
   In file included from include/linux/scatterlist.h:9:
   In file included from arch/hexagon/include/asm/io.h:334:
   include/asm-generic/io.h:573:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     573 |         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/dma.c:8:
   In file included from include/linux/dma-map-ops.h:9:
   In file included from include/linux/dma-mapping.h:10:
   In file included from include/linux/scatterlist.h:9:
   In file included from arch/hexagon/include/asm/io.h:334:
   include/asm-generic/io.h:584:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     584 |         __raw_writeb(value, PCI_IOBASE + addr);
         |                             ~~~~~~~~~~ ^
   include/asm-generic/io.h:594:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     594 |         __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
         |                                                       ~~~~~~~~~~ ^
   include/asm-generic/io.h:604:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     604 |         __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
         |                                                       ~~~~~~~~~~ ^
   arch/hexagon/kernel/dma.c:19:27: error: use of undeclared identifier 'paddr'
      19 |         hexagon_inv_dcache_range(paddr, paddr + size);
         |                                  ^
   arch/hexagon/kernel/dma.c:19:34: error: use of undeclared identifier 'paddr'
      19 |         hexagon_inv_dcache_range(paddr, paddr + size);
         |                                         ^
>> arch/hexagon/kernel/dma.c:24:2: error: call to undeclared function 'hexagon_flush_dcache_range'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
      24 |         hexagon_flush_dcache_range(paddr, paddr + size);
         |         ^
   arch/hexagon/kernel/dma.c:24:2: note: did you mean 'hexagon_clean_dcache_range'?
   arch/hexagon/include/asm/cacheflush.h:75:13: note: 'hexagon_clean_dcache_range' declared here
      75 | extern void hexagon_clean_dcache_range(unsigned long start, unsigned long end);
         |             ^
   arch/hexagon/kernel/dma.c:24:29: error: use of undeclared identifier 'paddr'
      24 |         hexagon_flush_dcache_range(paddr, paddr + size);
         |                                    ^
   arch/hexagon/kernel/dma.c:24:36: error: use of undeclared identifier 'paddr'
      24 |         hexagon_flush_dcache_range(paddr, paddr + size);
         |                                           ^
   6 warnings and 5 errors generated.


vim +/hexagon_flush_dcache_range +24 arch/hexagon/kernel/dma.c

    21	
    22	static inline void arch_dma_cache_wback_inv(phys_addr_t start, size_t size)
    23	{
  > 24		hexagon_flush_dcache_range(paddr, paddr + size);
    25	}
    26	

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