Re: [PATCH net-next 05/11] net: enetc: add enetc-pf-common driver support

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

Hi Wei,

kernel test robot noticed the following build warnings:

[auto build test WARNING on net-next/main]

url:    https://github.com/intel-lab-lkp/linux/commits/Wei-Fang/dt-bindings-net-add-compatible-string-for-i-MX95-EMDIO/20241009-181113
base:   net-next/main
patch link:    https://lore.kernel.org/r/20241009095116.147412-6-wei.fang%40nxp.com
patch subject: [PATCH net-next 05/11] net: enetc: add enetc-pf-common driver support
config: hexagon-allmodconfig (https://download.01.org/0day-ci/archive/20241011/202410110019.xUSLtcAC-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/20241011/202410110019.xUSLtcAC-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/202410110019.xUSLtcAC-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from drivers/net/ethernet/freescale/enetc/enetc_pf_common.c:3:
   In file included from include/linux/fsl/enetc_mdio.h:7:
   In file included from include/linux/phy.h:16:
   In file included from include/linux/ethtool.h:18:
   In file included from include/linux/if_ether.h:19:
   In file included from include/linux/skbuff.h:17:
   In file included from include/linux/bvec.h:10:
   In file included from include/linux/highmem.h:10:
   In file included from include/linux/mm.h:2213:
   include/linux/vmstat.h:518:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
     518 |         return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
         |                               ~~~~~~~~~~~ ^ ~~~
   In file included from drivers/net/ethernet/freescale/enetc/enetc_pf_common.c:3:
   In file included from include/linux/fsl/enetc_mdio.h:7:
   In file included from include/linux/phy.h:16:
   In file included from include/linux/ethtool.h:18:
   In file included from include/linux/if_ether.h:19:
   In file included from include/linux/skbuff.h:17:
   In file included from include/linux/bvec.h:10:
   In file included from include/linux/highmem.h:12:
   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:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     548 |         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]
     561 |         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 drivers/net/ethernet/freescale/enetc/enetc_pf_common.c:3:
   In file included from include/linux/fsl/enetc_mdio.h:7:
   In file included from include/linux/phy.h:16:
   In file included from include/linux/ethtool.h:18:
   In file included from include/linux/if_ether.h:19:
   In file included from include/linux/skbuff.h:17:
   In file included from include/linux/bvec.h:10:
   In file included from include/linux/highmem.h:12:
   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:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     574 |         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 drivers/net/ethernet/freescale/enetc/enetc_pf_common.c:3:
   In file included from include/linux/fsl/enetc_mdio.h:7:
   In file included from include/linux/phy.h:16:
   In file included from include/linux/ethtool.h:18:
   In file included from include/linux/if_ether.h:19:
   In file included from include/linux/skbuff.h:17:
   In file included from include/linux/bvec.h:10:
   In file included from include/linux/highmem.h:12:
   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:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     585 |         __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]
     595 |         __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]
     605 |         __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
         |                                                       ~~~~~~~~~~ ^
   In file included from drivers/net/ethernet/freescale/enetc/enetc_pf_common.c:3:
>> include/linux/fsl/enetc_mdio.h:62:18: warning: no previous prototype for function 'enetc_hw_alloc' [-Wmissing-prototypes]
      62 | struct enetc_hw *enetc_hw_alloc(struct device *dev, void __iomem *port_regs)
         |                  ^
   include/linux/fsl/enetc_mdio.h:62:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
      62 | struct enetc_hw *enetc_hw_alloc(struct device *dev, void __iomem *port_regs)
         | ^
         | static 
   8 warnings generated.

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 +/enetc_hw_alloc +62 include/linux/fsl/enetc_mdio.h

6517798dd3432a Claudiu Manoil 2020-01-06  49  
80e87442e69ba8 Andrew Lunn    2023-01-12  50  static inline int enetc_mdio_read_c22(struct mii_bus *bus, int phy_id,
80e87442e69ba8 Andrew Lunn    2023-01-12  51  				      int regnum)
6517798dd3432a Claudiu Manoil 2020-01-06  52  { return -EINVAL; }
80e87442e69ba8 Andrew Lunn    2023-01-12  53  static inline int enetc_mdio_write_c22(struct mii_bus *bus, int phy_id,
80e87442e69ba8 Andrew Lunn    2023-01-12  54  				       int regnum, u16 value)
80e87442e69ba8 Andrew Lunn    2023-01-12  55  { return -EINVAL; }
80e87442e69ba8 Andrew Lunn    2023-01-12  56  static inline int enetc_mdio_read_c45(struct mii_bus *bus, int phy_id,
80e87442e69ba8 Andrew Lunn    2023-01-12  57  				      int devad, int regnum)
80e87442e69ba8 Andrew Lunn    2023-01-12  58  { return -EINVAL; }
80e87442e69ba8 Andrew Lunn    2023-01-12  59  static inline int enetc_mdio_write_c45(struct mii_bus *bus, int phy_id,
80e87442e69ba8 Andrew Lunn    2023-01-12  60  				       int devad, int regnum, u16 value)
6517798dd3432a Claudiu Manoil 2020-01-06  61  { return -EINVAL; }
6517798dd3432a Claudiu Manoil 2020-01-06 @62  struct enetc_hw *enetc_hw_alloc(struct device *dev, void __iomem *port_regs)
6517798dd3432a Claudiu Manoil 2020-01-06  63  { return ERR_PTR(-EINVAL); }
6517798dd3432a Claudiu Manoil 2020-01-06  64  

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