Hi "Adalbert, Thank you for the patch! Yet something to improve: [auto build test ERROR on dc924b062488a0376aae41d3e0a27dc99f852a5e] url: https://github.com/0day-ci/linux/commits/Adalbert-Laz-r/VM-introspection/20201125-174530 base: dc924b062488a0376aae41d3e0a27dc99f852a5e config: s390-randconfig-r005-20201125 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 77e98eaee2e8d4b9b297b66fda5b1e51e2a69999) 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 s390 cross compiling tool for clang build # apt-get install binutils-s390x-linux-gnu # https://github.com/0day-ci/linux/commit/6ffa5da71155bd0bed0d68c52af248bda256d0f2 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Adalbert-Laz-r/VM-introspection/20201125-174530 git checkout 6ffa5da71155bd0bed0d68c52af248bda256d0f2 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=s390 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): include/asm-generic/io.h:490:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr)); ~~~~~~~~~~ ^ include/uapi/linux/byteorder/big_endian.h:34:59: note: expanded from macro '__le32_to_cpu' #define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x)) ^ include/uapi/linux/swab.h:119:21: note: expanded from macro '__swab32' ___constant_swab32(x) : \ ^ include/uapi/linux/swab.h:21:12: note: expanded from macro '___constant_swab32' (((__u32)(x) & (__u32)0x00ff0000UL) >> 8) | \ ^ In file included from arch/s390/kvm/../../../virt/kvm/kvm_main.c:18: In file included from include/linux/kvm_host.h:32: In file included from include/linux/kvm_para.h:5: In file included from include/uapi/linux/kvm_para.h:40: In file included from arch/s390/include/asm/kvm_para.h:25: In file included from arch/s390/include/asm/diag.h:12: In file included from include/linux/if_ether.h:19: In file included from include/linux/skbuff.h:31: In file included from include/linux/dma-mapping.h:10: In file included from include/linux/scatterlist.h:9: In file included from arch/s390/include/asm/io.h:80: include/asm-generic/io.h:490:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr)); ~~~~~~~~~~ ^ include/uapi/linux/byteorder/big_endian.h:34:59: note: expanded from macro '__le32_to_cpu' #define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x)) ^ include/uapi/linux/swab.h:119:21: note: expanded from macro '__swab32' ___constant_swab32(x) : \ ^ include/uapi/linux/swab.h:22:12: note: expanded from macro '___constant_swab32' (((__u32)(x) & (__u32)0xff000000UL) >> 24))) ^ In file included from arch/s390/kvm/../../../virt/kvm/kvm_main.c:18: In file included from include/linux/kvm_host.h:32: In file included from include/linux/kvm_para.h:5: In file included from include/uapi/linux/kvm_para.h:40: In file included from arch/s390/include/asm/kvm_para.h:25: In file included from arch/s390/include/asm/diag.h:12: In file included from include/linux/if_ether.h:19: In file included from include/linux/skbuff.h:31: In file included from include/linux/dma-mapping.h:10: In file included from include/linux/scatterlist.h:9: In file included from arch/s390/include/asm/io.h:80: include/asm-generic/io.h:490:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr)); ~~~~~~~~~~ ^ include/uapi/linux/byteorder/big_endian.h:34:59: note: expanded from macro '__le32_to_cpu' #define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x)) ^ include/uapi/linux/swab.h:120:12: note: expanded from macro '__swab32' __fswab32(x)) ^ In file included from arch/s390/kvm/../../../virt/kvm/kvm_main.c:18: In file included from include/linux/kvm_host.h:32: In file included from include/linux/kvm_para.h:5: In file included from include/uapi/linux/kvm_para.h:40: In file included from arch/s390/include/asm/kvm_para.h:25: In file included from arch/s390/include/asm/diag.h:12: In file included from include/linux/if_ether.h:19: In file included from include/linux/skbuff.h:31: In file included from include/linux/dma-mapping.h:10: In file included from include/linux/scatterlist.h:9: In file included from arch/s390/include/asm/io.h:80: include/asm-generic/io.h:501:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writeb(value, PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:511:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:521:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:609:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] readsb(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:617:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] readsw(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:625:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] readsl(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:634:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] writesb(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:643:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] writesw(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:652:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] writesl(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ In file included from arch/s390/kvm/../../../virt/kvm/kvm_main.c:18: include/linux/kvm_host.h:925:14: warning: declaration of 'struct kvm_xsave' will not be visible outside of this function [-Wvisibility] struct kvm_xsave *guest_xsave); ^ include/linux/kvm_host.h:927:13: warning: declaration of 'struct kvm_xsave' will not be visible outside of this function [-Wvisibility] struct kvm_xsave *guest_xsave); ^ >> arch/s390/kvm/../../../virt/kvm/kvm_main.c:806:6: error: use of undeclared identifier 'enable_introspection' if (enable_introspection) ^ arch/s390/kvm/../../../virt/kvm/kvm_main.c:861:6: error: use of undeclared identifier 'enable_introspection' if (enable_introspection) ^ arch/s390/kvm/../../../virt/kvm/kvm_main.c:5012:6: error: use of undeclared identifier 'enable_introspection' if (enable_introspection) { ^ 22 warnings and 3 errors generated. vim +/enable_introspection +806 arch/s390/kvm/../../../virt/kvm/kvm_main.c 797 798 r = kvm_init_mmu_notifier(kvm); 799 if (r) 800 goto out_err_no_mmu_notifier; 801 802 r = kvm_arch_post_init_vm(kvm); 803 if (r) 804 goto out_err; 805 > 806 if (enable_introspection) 807 kvmi_create_vm(kvm); 808 809 mutex_lock(&kvm_lock); 810 list_add(&kvm->vm_list, &vm_list); 811 mutex_unlock(&kvm_lock); 812 813 preempt_notifier_inc(); 814 815 return kvm; 816 817 out_err: 818 #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER) 819 if (kvm->mmu_notifier.ops) 820 mmu_notifier_unregister(&kvm->mmu_notifier, current->mm); 821 #endif 822 out_err_no_mmu_notifier: 823 hardware_disable_all(); 824 out_err_no_disable: 825 kvm_arch_destroy_vm(kvm); 826 out_err_no_arch_destroy_vm: 827 WARN_ON_ONCE(!refcount_dec_and_test(&kvm->users_count)); 828 for (i = 0; i < KVM_NR_BUSES; i++) 829 kfree(kvm_get_bus(kvm, i)); 830 for (i = 0; i < KVM_ADDRESS_SPACE_NUM; i++) 831 kvm_free_memslots(kvm, __kvm_memslots(kvm, i)); 832 cleanup_srcu_struct(&kvm->irq_srcu); 833 out_err_no_irq_srcu: 834 cleanup_srcu_struct(&kvm->srcu); 835 out_err_no_srcu: 836 kvm_arch_free_vm(kvm); 837 mmdrop(current->mm); 838 return ERR_PTR(r); 839 } 840 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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