Re: [linux-next:master 5576/13785] /tmp/clk-cdce925-041827.s:1150: Error: unrecognized opcode `zext.b a1, s2'

[Philip Li <philip.li@intel.com>]

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On Sat, Dec 19, 2020 at 06:50:23AM +0800, kernel test robot wrote:
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
> head:   0d52778b8710eb11cb616761a02aee0a7fd60425
> commit: b1246bd4a18b50c0f424a877ab64605ce8ebad86 [5576/13785] drm/amdgpu: Fix missing prototype warning
> config: riscv-randconfig-r022-20201217 (attached as .config)
> compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project cee1e7d14f4628d6174b33640d502bff3b54ae45)
> 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 riscv cross compiling tool for clang build
>         # apt-get install binutils-riscv64-linux-gnu
>         # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=b1246bd4a18b50c0f424a877ab64605ce8ebad86
>         git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
>         git fetch --no-tags linux-next master
>         git checkout b1246bd4a18b50c0f424a877ab64605ce8ebad86
>         # save the attached .config to linux build tree
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=riscv 
> 
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@intel.com>
Hi Luben, kindly ignore this false positive report.

Thanks

> 
> Note: the linux-next/master HEAD 0d52778b8710eb11cb616761a02aee0a7fd60425 builds fine.
>       It may have been fixed somewhere.
> 
> All errors (new ones prefixed by >>):
> 
>    In file included from drivers/clk/clk-cdce925.c:18:
>    In file included from include/linux/regmap.h:20:
>    In file included from include/linux/iopoll.h:14:
>    In file included from include/linux/io.h:13:
>    In file included from arch/riscv/include/asm/io.h:149:
>    include/asm-generic/io.h:556:9: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
>            return inb(addr);
>                   ^~~~~~~~~
>    arch/riscv/include/asm/io.h:55:76: note: expanded from macro 'inb'
>    #define inb(c)          ({ u8  __v; __io_pbr(); __v = readb_cpu((void*)(PCI_IOBASE + (c))); __io_par(__v); __v; })
>                                                                            ~~~~~~~~~~ ^
>    arch/riscv/include/asm/mmio.h:87:48: note: expanded from macro 'readb_cpu'
>    #define readb_cpu(c)            ({ u8  __r = __raw_readb(c); __r; })
>                                                             ^
>    In file included from drivers/clk/clk-cdce925.c:18:
>    In file included from include/linux/regmap.h:20:
>    In file included from include/linux/iopoll.h:14:
>    In file included from include/linux/io.h:13:
>    In file included from arch/riscv/include/asm/io.h:149:
>    include/asm-generic/io.h:564:9: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
>            return inw(addr);
>                   ^~~~~~~~~
>    arch/riscv/include/asm/io.h:56:76: note: expanded from macro 'inw'
>    #define inw(c)          ({ u16 __v; __io_pbr(); __v = readw_cpu((void*)(PCI_IOBASE + (c))); __io_par(__v); __v; })
>                                                                            ~~~~~~~~~~ ^
>    arch/riscv/include/asm/mmio.h:88:76: note: expanded from macro 'readw_cpu'
>    #define readw_cpu(c)            ({ u16 __r = le16_to_cpu((__force __le16)__raw_readw(c)); __r; })
>                                                                                         ^
>    include/uapi/linux/byteorder/little_endian.h:36:51: note: expanded from macro '__le16_to_cpu'
>    #define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
>                                                      ^
>    In file included from drivers/clk/clk-cdce925.c:18:
>    In file included from include/linux/regmap.h:20:
>    In file included from include/linux/iopoll.h:14:
>    In file included from include/linux/io.h:13:
>    In file included from arch/riscv/include/asm/io.h:149:
>    include/asm-generic/io.h:572:9: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
>            return inl(addr);
>                   ^~~~~~~~~
>    arch/riscv/include/asm/io.h:57:76: note: expanded from macro 'inl'
>    #define inl(c)          ({ u32 __v; __io_pbr(); __v = readl_cpu((void*)(PCI_IOBASE + (c))); __io_par(__v); __v; })
>                                                                            ~~~~~~~~~~ ^
>    arch/riscv/include/asm/mmio.h:89:76: note: expanded from macro 'readl_cpu'
>    #define readl_cpu(c)            ({ u32 __r = le32_to_cpu((__force __le32)__raw_readl(c)); __r; })
>                                                                                         ^
>    include/uapi/linux/byteorder/little_endian.h:34:51: note: expanded from macro '__le32_to_cpu'
>    #define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
>                                                      ^
>    In file included from drivers/clk/clk-cdce925.c:18:
>    In file included from include/linux/regmap.h:20:
>    In file included from include/linux/iopoll.h:14:
>    In file included from include/linux/io.h:13:
>    In file included from arch/riscv/include/asm/io.h:149:
>    include/asm-generic/io.h:580:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
>            outb(value, addr);
>            ^~~~~~~~~~~~~~~~~
>    arch/riscv/include/asm/io.h:59:68: note: expanded from macro 'outb'
>    #define outb(v,c)       ({ __io_pbw(); writeb_cpu((v),(void*)(PCI_IOBASE + (c))); __io_paw(); })
>                                                                  ~~~~~~~~~~ ^
>    arch/riscv/include/asm/mmio.h:91:52: note: expanded from macro 'writeb_cpu'
>    #define writeb_cpu(v, c)        ((void)__raw_writeb((v), (c)))
>                                                              ^
>    In file included from drivers/clk/clk-cdce925.c:18:
>    In file included from include/linux/regmap.h:20:
>    In file included from include/linux/iopoll.h:14:
>    In file included from include/linux/io.h:13:
>    In file included from arch/riscv/include/asm/io.h:149:
>    include/asm-generic/io.h:588:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
>            outw(value, addr);
>            ^~~~~~~~~~~~~~~~~
>    arch/riscv/include/asm/io.h:60:68: note: expanded from macro 'outw'
>    #define outw(v,c)       ({ __io_pbw(); writew_cpu((v),(void*)(PCI_IOBASE + (c))); __io_paw(); })
>                                                                  ~~~~~~~~~~ ^
>    arch/riscv/include/asm/mmio.h:92:76: note: expanded from macro 'writew_cpu'
>    #define writew_cpu(v, c)        ((void)__raw_writew((__force u16)cpu_to_le16(v), (c)))
>                                                                                      ^
>    In file included from drivers/clk/clk-cdce925.c:18:
>    In file included from include/linux/regmap.h:20:
>    In file included from include/linux/iopoll.h:14:
>    In file included from include/linux/io.h:13:
>    In file included from arch/riscv/include/asm/io.h:149:
>    include/asm-generic/io.h:596:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
>            outl(value, addr);
>            ^~~~~~~~~~~~~~~~~
>    arch/riscv/include/asm/io.h:61:68: note: expanded from macro 'outl'
>    #define outl(v,c)       ({ __io_pbw(); writel_cpu((v),(void*)(PCI_IOBASE + (c))); __io_paw(); })
>                                                                  ~~~~~~~~~~ ^
>    arch/riscv/include/asm/mmio.h:93:76: note: expanded from macro 'writel_cpu'
>    #define writel_cpu(v, c)        ((void)__raw_writel((__force u32)cpu_to_le32(v), (c)))
>                                                                                      ^
>    In file included from drivers/clk/clk-cdce925.c:18:
>    In file included from include/linux/regmap.h:20:
>    In file included from include/linux/iopoll.h:14:
>    In file included from include/linux/io.h:13:
>    In file included from arch/riscv/include/asm/io.h:149:
>    include/asm-generic/io.h:1005:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
>            return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
>                                                      ~~~~~~~~~~ ^
>    7 warnings generated.
>    /tmp/clk-cdce925-041827.s: Assembler messages:
> >> /tmp/clk-cdce925-041827.s:1150: Error: unrecognized opcode `zext.b a1,s2'
> >> /tmp/clk-cdce925-041827.s:1207: Error: unrecognized opcode `zext.b a5,a6'
> >> /tmp/clk-cdce925-041827.s:1255: Error: unrecognized opcode `zext.b a1,a0'
> >> /tmp/clk-cdce925-041827.s:1333: Error: unrecognized opcode `zext.b s3,s2'
> >> /tmp/clk-cdce925-041827.s:1335: Error: unrecognized opcode `zext.b a2,s5'
> >> /tmp/clk-cdce925-041827.s:2162: Error: unrecognized opcode `zext.b a2,s2'
>    clang-12: error: assembler command failed with exit code 1 (use -v to see invocation)
> 
> ---
> 0-DAY CI Kernel Test Service, Intel Corporation
> https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org


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