[driver-core:kobject-const 122/122] drivers/iommu/iommu.c:118:2: error: initializing 'struct bus_type *const' with an expression of type 'const struct bus_type *' discards qualifiers

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core.git kobject-const
head:   de9d11ba9a2261b62a065a1b6539eecf8a6d81f5
commit: de9d11ba9a2261b62a065a1b6539eecf8a6d81f5 [122/122] driver core: platform: make platform_bus_type constant
config: arm64-randconfig-r015-20230220 (https://download.01.org/0day-ci/archive/20230221/[email protected]/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project db89896bbbd2251fff457699635acbbedeead27f)
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 arm64 cross compiling tool for clang build
        # apt-get install binutils-aarch64-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core.git/commit/?id=de9d11ba9a2261b62a065a1b6539eecf8a6d81f5
        git remote add driver-core https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core.git
        git fetch --no-tags driver-core kobject-const
        git checkout de9d11ba9a2261b62a065a1b6539eecf8a6d81f5
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm64 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm64 SHELL=/bin/bash drivers/iommu/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <[email protected]>
| Link: https://lore.kernel.org/oe-kbuild-all/[email protected]/

All errors (new ones prefixed by >>):

>> drivers/iommu/iommu.c:118:2: error: initializing 'struct bus_type *const' with an expression of type 'const struct bus_type *' discards qualifiers [-Werror,-Wincompatible-pointer-types-discards-qualifiers]
           &platform_bus_type,
           ^~~~~~~~~~~~~~~~~~
   1 error generated.


vim +118 drivers/iommu/iommu.c

b0119e870837dc Joerg Roedel 2017-02-01  116  
c13dbc1e248549 Robin Murphy 2022-08-15  117  static struct bus_type * const iommu_buses[] = {
c13dbc1e248549 Robin Murphy 2022-08-15 @118  	&platform_bus_type,
c13dbc1e248549 Robin Murphy 2022-08-15  119  #ifdef CONFIG_PCI
c13dbc1e248549 Robin Murphy 2022-08-15  120  	&pci_bus_type,
c13dbc1e248549 Robin Murphy 2022-08-15  121  #endif
c13dbc1e248549 Robin Murphy 2022-08-15  122  #ifdef CONFIG_ARM_AMBA
c13dbc1e248549 Robin Murphy 2022-08-15  123  	&amba_bustype,
c13dbc1e248549 Robin Murphy 2022-08-15  124  #endif
c13dbc1e248549 Robin Murphy 2022-08-15  125  #ifdef CONFIG_FSL_MC_BUS
c13dbc1e248549 Robin Murphy 2022-08-15  126  	&fsl_mc_bus_type,
c13dbc1e248549 Robin Murphy 2022-08-15  127  #endif
c13dbc1e248549 Robin Murphy 2022-08-15  128  #ifdef CONFIG_TEGRA_HOST1X_CONTEXT_BUS
c13dbc1e248549 Robin Murphy 2022-08-15  129  	&host1x_context_device_bus_type,
c13dbc1e248549 Robin Murphy 2022-08-15  130  #endif
c13dbc1e248549 Robin Murphy 2022-08-15  131  };
c13dbc1e248549 Robin Murphy 2022-08-15  132  

:::::: The code at line 118 was first introduced by commit
:::::: c13dbc1e24854908376c40ccaeb7a3a3c111e3af iommu: Always register bus notifiers

:::::: TO: Robin Murphy <[email protected]>
:::::: CC: Joerg Roedel <[email protected]>

-- 
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https://github.com/intel/lkp-tests
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