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Date:   Fri, 11 Dec 2020 12:21:42 +0800
From:   kernel test robot <lkp@...el.com>
To:     Michael Grzeschik <m.grzeschik@...gutronix.de>,
        netdev@...r.kernel.org
Cc:     kbuild-all@...ts.01.org, clang-built-linux@...glegroups.com,
        andrew@...n.ch, f.fainelli@...il.com, davem@...emloft.net,
        kernel@...gutronix.de, matthias.schiffer@...tq-group.com,
        woojung.huh@...rochip.com, UNGLinuxDriver@...rochip.com
Subject: Re: [PATCH v5 3/6] net: dsa: microchip: ksz8795: move register
 offsets and shifts to separate struct

Hi Michael,

I love your patch! Perhaps something to improve:

[auto build test WARNING on net-next/master]
[also build test WARNING on next-20201210]
[cannot apply to net/master ipvs/master linus/master v5.10-rc7]
[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]

url:    https://github.com/0day-ci/linux/commits/Michael-Grzeschik/microchip-add-support-for-ksz88x3-driver-family/20201207-205945
base:   https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git af3f4a85d90218bb59315d591bd2bffa5e646466
config: riscv-randconfig-r003-20201210 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 1968804ac726e7674d5de22bc2204b45857da344)
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://github.com/0day-ci/linux/commit/db1f7322c8fa2c28587f13ab3eebbb6ee02874b1
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Michael-Grzeschik/microchip-add-support-for-ksz88x3-driver-family/20201207-205945
        git checkout db1f7322c8fa2c28587f13ab3eebbb6ee02874b1
        # 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@...el.com>

All warnings (new ones prefixed by >>):

                                                                           ~~~~~~~~~~ ^
   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/net/dsa/microchip/ksz8795.c:11:
   In file included from include/linux/gpio.h:62:
   In file included from include/asm-generic/gpio.h:11:
   In file included from include/linux/gpio/driver.h:7:
   In file included from include/linux/irq.h:20:
   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/net/dsa/microchip/ksz8795.c:11:
   In file included from include/linux/gpio.h:62:
   In file included from include/asm-generic/gpio.h:11:
   In file included from include/linux/gpio/driver.h:7:
   In file included from include/linux/irq.h:20:
   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/net/dsa/microchip/ksz8795.c:11:
   In file included from include/linux/gpio.h:62:
   In file included from include/asm-generic/gpio.h:11:
   In file included from include/linux/gpio/driver.h:7:
   In file included from include/linux/irq.h:20:
   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/net/dsa/microchip/ksz8795.c:11:
   In file included from include/linux/gpio.h:62:
   In file included from include/asm-generic/gpio.h:11:
   In file included from include/linux/gpio/driver.h:7:
   In file included from include/linux/irq.h:20:
   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/net/dsa/microchip/ksz8795.c:11:
   In file included from include/linux/gpio.h:62:
   In file included from include/asm-generic/gpio.h:11:
   In file included from include/linux/gpio/driver.h:7:
   In file included from include/linux/irq.h:20:
   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/net/dsa/microchip/ksz8795.c:11:
   In file included from include/linux/gpio.h:62:
   In file included from include/asm-generic/gpio.h:11:
   In file included from include/linux/gpio/driver.h:7:
   In file included from include/linux/irq.h:20:
   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;
                                                     ~~~~~~~~~~ ^
>> drivers/net/dsa/microchip/ksz8795.c:69:27: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides]
           [DYNAMIC_MAC_ENTRIES]           = 29,
                                             ^~
   drivers/net/dsa/microchip/ksz8795.c:64:29: note: previous initialization is here
           [VLAN_TABLE_MEMBERSHIP]         = 7,
                                             ^
   8 warnings generated.
   /tmp/ksz8795-ce9b6a.s: Assembler messages:
   /tmp/ksz8795-ce9b6a.s:183: Error: unrecognized opcode `zext.b a2,s9'
   /tmp/ksz8795-ce9b6a.s:447: Error: unrecognized opcode `zext.b a2,a1'
   /tmp/ksz8795-ce9b6a.s:454: Error: unrecognized opcode `zext.b a2,a0'
   /tmp/ksz8795-ce9b6a.s:521: Error: unrecognized opcode `zext.b a0,s3'
   /tmp/ksz8795-ce9b6a.s:555: Error: unrecognized opcode `zext.b s6,s3'
   /tmp/ksz8795-ce9b6a.s:568: Error: unrecognized opcode `zext.b s3,s1'
   /tmp/ksz8795-ce9b6a.s:635: Error: unrecognized opcode `zext.b a0,s3'
   /tmp/ksz8795-ce9b6a.s:654: Error: unrecognized opcode `zext.b a0,s3'
   /tmp/ksz8795-ce9b6a.s:737: Error: unrecognized opcode `zext.b s3,s3'
   /tmp/ksz8795-ce9b6a.s:753: Error: unrecognized opcode `zext.b s1,a1'
   /tmp/ksz8795-ce9b6a.s:794: Error: unrecognized opcode `zext.b s3,s3'
   /tmp/ksz8795-ce9b6a.s:836: Error: unrecognized opcode `zext.b s1,a1'
   /tmp/ksz8795-ce9b6a.s:880: Error: unrecognized opcode `zext.b s1,a1'
   /tmp/ksz8795-ce9b6a.s:1548: Error: unrecognized opcode `zext.b a2,a1'
   /tmp/ksz8795-ce9b6a.s:1572: Error: unrecognized opcode `zext.b a2,a1'
   /tmp/ksz8795-ce9b6a.s:1610: Error: unrecognized opcode `zext.b s3,a1'
   /tmp/ksz8795-ce9b6a.s:1648: Error: unrecognized opcode `zext.b a2,a0'
   /tmp/ksz8795-ce9b6a.s:1658: Error: unrecognized opcode `zext.b a2,a0'
   /tmp/ksz8795-ce9b6a.s:1665: Error: unrecognized opcode `zext.b a2,a0'
   /tmp/ksz8795-ce9b6a.s:1676: Error: unrecognized opcode `zext.b a2,a0'
   /tmp/ksz8795-ce9b6a.s:1687: Error: unrecognized opcode `zext.b a2,a0'
   /tmp/ksz8795-ce9b6a.s:2701: Error: unrecognized opcode `zext.b a2,s7'
   /tmp/ksz8795-ce9b6a.s:2868: Error: unrecognized opcode `zext.b a4,a4'
   /tmp/ksz8795-ce9b6a.s:2876: Error: unrecognized opcode `zext.b a1,a1'
   /tmp/ksz8795-ce9b6a.s:3027: Error: unrecognized opcode `zext.b a1,a1'
   /tmp/ksz8795-ce9b6a.s:3049: Error: unrecognized opcode `zext.b a2,a2'
   clang-12: error: assembler command failed with exit code 1 (use -v to see invocation)

vim +69 drivers/net/dsa/microchip/ksz8795.c

    62	
    63	static const u8 ksz8795_shifts[] = {
    64		[VLAN_TABLE_MEMBERSHIP]		= 7,
    65		[VLAN_TABLE]			= 16,
    66		[STATIC_MAC_FWD_PORTS]		= 16,
    67		[STATIC_MAC_FID]		= 24,
    68		[DYNAMIC_MAC_ENTRIES_H]		= 3,
  > 69		[DYNAMIC_MAC_ENTRIES]		= 29,
    70		[DYNAMIC_MAC_FID]		= 16,
    71		[DYNAMIC_MAC_TIMESTAMP]		= 27,
    72		[DYNAMIC_MAC_SRC_PORT]		= 24,
    73	};
    74	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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