Hi Srinivasan, I love your patch! Perhaps something to improve: [auto build test WARNING on v4.17-rc2] [also build test WARNING on next-20180426] [cannot apply to tip/x86/core] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linux/commits/kys-linuxonhyperv-com/X86-Hyper-V-APIC-enlightenments/20180427-114416 reproduce: # apt-get install sparse make ARCH=x86_64 allmodconfig make C=1 CF=-D__CHECK_ENDIAN__ sparse warnings: (new ones prefixed by >>) >> arch/x86/hyperv/mmu.c:86:22: sparse: incorrect type in initializer (different address spaces) @@ expected void const [noderef] <asn:3>*__vpp_verify @@ got const [noderef] <asn:3>*__vpp_verify @@ arch/x86/hyperv/mmu.c:86:22: expected void const [noderef] <asn:3>*__vpp_verify arch/x86/hyperv/mmu.c:86:22: got void [noderef] <asn:3>**<noident> arch/x86/hyperv/mmu.c:171:22: sparse: incorrect type in initializer (different address spaces) @@ expected void const [noderef] <asn:3>*__vpp_verify @@ got const [noderef] <asn:3>*__vpp_verify @@ arch/x86/hyperv/mmu.c:171:22: expected void const [noderef] <asn:3>*__vpp_verify arch/x86/hyperv/mmu.c:171:22: got void [noderef] <asn:3>**<noident> vim +86 arch/x86/hyperv/mmu.c 65 66 static void hyperv_flush_tlb_others(const struct cpumask *cpus, 67 const struct flush_tlb_info *info) 68 { 69 int cpu, vcpu, gva_n, max_gvas; 70 struct hv_flush_pcpu **flush_pcpu; 71 struct hv_flush_pcpu *flush; 72 u64 status = U64_MAX; 73 unsigned long flags; 74 75 trace_hyperv_mmu_flush_tlb_others(cpus, info); 76 77 if (!hv_hypercall_pg) 78 goto do_native; 79 80 if (cpumask_empty(cpus)) 81 return; 82 83 local_irq_save(flags); 84 85 flush_pcpu = (struct hv_flush_pcpu **) > 86 this_cpu_ptr(hyperv_pcpu_input_arg); 87 88 flush = *flush_pcpu; 89 90 if (unlikely(!flush)) { 91 local_irq_restore(flags); 92 goto do_native; 93 } 94 95 if (info->mm) { 96 /* 97 * AddressSpace argument must match the CR3 with PCID bits 98 * stripped out. 99 */ 100 flush->address_space = virt_to_phys(info->mm->pgd); 101 flush->address_space &= CR3_ADDR_MASK; 102 flush->flags = 0; 103 } else { 104 flush->address_space = 0; 105 flush->flags = HV_FLUSH_ALL_VIRTUAL_ADDRESS_SPACES; 106 } 107 108 flush->processor_mask = 0; 109 if (cpumask_equal(cpus, cpu_present_mask)) { 110 flush->flags |= HV_FLUSH_ALL_PROCESSORS; 111 } else { 112 for_each_cpu(cpu, cpus) { 113 vcpu = hv_cpu_number_to_vp_number(cpu); 114 if (vcpu >= 64) 115 goto do_native; 116 117 __set_bit(vcpu, (unsigned long *) 118 &flush->processor_mask); 119 } 120 } 121 122 /* 123 * We can flush not more than max_gvas with one hypercall. Flush the 124 * whole address space if we were asked to do more. 125 */ 126 max_gvas = (PAGE_SIZE - sizeof(*flush)) / sizeof(flush->gva_list[0]); 127 128 if (info->end == TLB_FLUSH_ALL) { 129 flush->flags |= HV_FLUSH_NON_GLOBAL_MAPPINGS_ONLY; 130 status = hv_do_hypercall(HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE, 131 flush, NULL); 132 } else if (info->end && 133 ((info->end - info->start)/HV_TLB_FLUSH_UNIT) > max_gvas) { 134 status = hv_do_hypercall(HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE, 135 flush, NULL); 136 } else { 137 gva_n = fill_gva_list(flush->gva_list, 0, 138 info->start, info->end); 139 status = hv_do_rep_hypercall(HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST, 140 gva_n, 0, flush, NULL); 141 } 142 143 local_irq_restore(flags); 144 145 if (!(status & HV_HYPERCALL_RESULT_MASK)) 146 return; 147 do_native: 148 native_flush_tlb_others(cpus, info); 149 } 150 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
