linux-kernel - [avpatel:riscv_ipi_imp_v7 8/23] include/linux/stddef.h:8:14: warning: initialization of 'unsigned int' from 'void *' makes integer from pointer without a cast

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Date:   Wed, 27 Jul 2022 22:36:16 +0800
From:   kernel test robot <lkp@...el.com>
To:     Anup Patel <apatel@...tanamicro.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Atish Patra <atishp@...osinc.com>
Subject: [avpatel:riscv_ipi_imp_v7 8/23] include/linux/stddef.h:8:14:
 warning: initialization of 'unsigned int' from 'void *' makes integer from
 pointer without a cast

tree:   https://github.com/avpatel/linux.git riscv_ipi_imp_v7
head:   5dc8676fc21b816e1b107a18f33a49b2acf645b7
commit: beca2348d03ad05136b6c2fd20d2fde9b5b0239e [8/23] KVM: Add gfp_custom flag in struct kvm_mmu_memory_cache
config: arm64-defconfig (https://download.01.org/0day-ci/archive/20220727/202207272227.X4sMLaS2-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 12.1.0
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
        # https://github.com/avpatel/linux/commit/beca2348d03ad05136b6c2fd20d2fde9b5b0239e
        git remote add avpatel https://github.com/avpatel/linux.git
        git fetch --no-tags avpatel riscv_ipi_imp_v7
        git checkout beca2348d03ad05136b6c2fd20d2fde9b5b0239e
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=arm64 SHELL=/bin/bash arch/arm64/kvm/ drivers/clk/keystone/

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

All warnings (new ones prefixed by >>):

   In file included from include/uapi/linux/posix_types.h:5,
                    from include/uapi/linux/types.h:14,
                    from include/linux/types.h:6,
                    from include/linux/kasan-checks.h:5,
                    from include/asm-generic/rwonce.h:26,
                    from arch/arm64/include/asm/rwonce.h:71,
                    from include/linux/compiler.h:248,
                    from include/asm-generic/bug.h:5,
                    from arch/arm64/include/asm/bug.h:26,
                    from include/linux/bug.h:5,
                    from include/linux/mmdebug.h:5,
                    from include/linux/mm.h:6,
                    from include/linux/mman.h:5,
                    from arch/arm64/kvm/mmu.c:7:
   arch/arm64/kvm/mmu.c: In function 'kvm_phys_addr_ioremap':
>> include/linux/stddef.h:8:14: warning: initialization of 'unsigned int' from 'void *' makes integer from pointer without a cast [-Wint-conversion]
       8 | #define NULL ((void *)0)
         |              ^
   arch/arm64/kvm/mmu.c:789:62: note: in expansion of macro 'NULL'
     789 |         struct kvm_mmu_memory_cache cache = { 0, __GFP_ZERO, NULL, };
         |                                                              ^~~~
   include/linux/stddef.h:8:14: note: (near initialization for 'cache.gfp_custom')
       8 | #define NULL ((void *)0)
         |              ^
   arch/arm64/kvm/mmu.c:789:62: note: in expansion of macro 'NULL'
     789 |         struct kvm_mmu_memory_cache cache = { 0, __GFP_ZERO, NULL, };
         |                                                              ^~~~


vim +8 include/linux/stddef.h

^1da177e4c3f41 Linus Torvalds   2005-04-16  6  
^1da177e4c3f41 Linus Torvalds   2005-04-16  7  #undef NULL
^1da177e4c3f41 Linus Torvalds   2005-04-16 @8  #define NULL ((void *)0)
6e218287432472 Richard Knutsson 2006-09-30  9  

:::::: The code at line 8 was first introduced by commit
:::::: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Linux-2.6.12-rc2

:::::: TO: Linus Torvalds <torvalds@...970.osdl.org>
:::::: CC: Linus Torvalds <torvalds@...970.osdl.org>

-- 
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https://01.org/lkp