linux-kernel - [rmk-arm:zii 42/87] drivers/net/pcs/pcs-xpcs.c:178:9: error: call to undeclared function 'mdiodev_c45_read'; ISO C99 and later do not support implicit function declarations

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Date:   Thu, 4 Aug 2022 06:13:19 +0800
From:   kernel test robot <lkp@...el.com>
To:     "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org
Subject: [rmk-arm:zii 42/87] drivers/net/pcs/pcs-xpcs.c:178:9: error: call to
 undeclared function 'mdiodev_c45_read'; ISO C99 and later do not support
 implicit function declarations

tree:   git://git.armlinux.org.uk/~rmk/linux-arm zii
head:   315d00812d1f8ed8bbbce4e4fd8d32fc883900a0
commit: 8994c74ee066d099110807ffcee3f61ffd62d28b [42/87] net: pcs: xpcs: use mdiodev accessors
config: arm-randconfig-r014-20220803 (https://download.01.org/0day-ci/archive/20220804/202208040637.Ng1pO69r-lkp@intel.com/config)
compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project 495519e5f8232d144ed26e9c18dbcbac6a5f25eb)
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 arm cross compiling tool for clang build
        # apt-get install binutils-arm-linux-gnueabi
        git remote add rmk-arm git://git.armlinux.org.uk/~rmk/linux-arm
        git fetch --no-tags rmk-arm zii
        git checkout 8994c74ee066d099110807ffcee3f61ffd62d28b
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash drivers/net/pcs/

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@...el.com>

All errors (new ones prefixed by >>):

>> drivers/net/pcs/pcs-xpcs.c:178:9: error: call to undeclared function 'mdiodev_c45_read'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
           return mdiodev_c45_read(xpcs->mdiodev, dev, reg);
                  ^
   drivers/net/pcs/pcs-xpcs.c:178:9: note: did you mean 'mdiobus_c45_read'?
   include/linux/mdio.h:505:19: note: 'mdiobus_c45_read' declared here
   static inline int mdiobus_c45_read(struct mii_bus *bus, int prtad, int devad,
                     ^
>> drivers/net/pcs/pcs-xpcs.c:183:9: error: call to undeclared function 'mdiodev_c45_write'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
           return mdiodev_c45_write(xpcs->mdiodev, dev, reg, val);
                  ^
   drivers/net/pcs/pcs-xpcs.c:183:9: note: did you mean 'mdiobus_c45_write'?
   include/linux/mdio.h:511:19: note: 'mdiobus_c45_write' declared here
   static inline int mdiobus_c45_write(struct mii_bus *bus, int prtad, int devad,
                     ^
   2 errors generated.


vim +/mdiodev_c45_read +178 drivers/net/pcs/pcs-xpcs.c

   172	
   173	#define xpcs_linkmode_supported(compat, mode) \
   174		__xpcs_linkmode_supported(compat, ETHTOOL_LINK_MODE_ ## mode ## _BIT)
   175	
   176	int xpcs_read(struct dw_xpcs *xpcs, int dev, u32 reg)
   177	{
 > 178		return mdiodev_c45_read(xpcs->mdiodev, dev, reg);
   179	}
   180	
   181	int xpcs_write(struct dw_xpcs *xpcs, int dev, u32 reg, u16 val)
   182	{
 > 183		return mdiodev_c45_write(xpcs->mdiodev, dev, reg, val);
   184	}
   185	

-- 
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https://01.org/lkp