Hi Waiman, [auto build test ERROR on kvm/linux-next] [also build test ERROR on v4.10-rc8 next-20170215] [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/Waiman-Long/x86-kvm-Reduce-vcpu_is_preempted-overhead/20170216-033517 base: https://git.kernel.org/pub/scm/virt/kvm/kvm.git linux-next config: i386-randconfig-h1-02160052 (attached as .config) compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901 reproduce: # save the attached .config to linux build tree make ARCH=i386 All error/warnings (new ones prefixed by >>): In file included from include/uapi/linux/stddef.h:1:0, from include/linux/stddef.h:4, from include/uapi/linux/posix_types.h:4, from include/uapi/linux/types.h:13, from include/linux/types.h:5, from include/uapi/linux/capability.h:16, from include/linux/capability.h:15, from include/linux/sched.h:15, from include/linux/context_tracking.h:4, from arch/x86/kernel/kvm.c:23: arch/x86/kernel/kvm.c: In function 'kvm_spinlock_init': >> arch/x86/kernel/kvm.c:631:6: error: 'PREEMPTED_OFFSET' undeclared (first use in this function) != PREEMPTED_OFFSET) || (sizeof(steal_time.preempted) != 1)); ^ include/linux/compiler.h:498:19: note: in definition of macro '__compiletime_assert' bool __cond = !(condition); \ ^~~~~~~~~ include/linux/compiler.h:518:2: note: in expansion of macro '_compiletime_assert' _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__) ^~~~~~~~~~~~~~~~~~~ include/linux/bug.h:54:37: note: in expansion of macro 'compiletime_assert' #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg) ^~~~~~~~~~~~~~~~~~ include/linux/bug.h:78:2: note: in expansion of macro 'BUILD_BUG_ON_MSG' BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition) ^~~~~~~~~~~~~~~~ >> arch/x86/kernel/kvm.c:630:2: note: in expansion of macro 'BUILD_BUG_ON' BUILD_BUG_ON((offsetof(struct kvm_steal_time, preempted) ^~~~~~~~~~~~ arch/x86/kernel/kvm.c:631:6: note: each undeclared identifier is reported only once for each function it appears in != PREEMPTED_OFFSET) || (sizeof(steal_time.preempted) != 1)); ^ include/linux/compiler.h:498:19: note: in definition of macro '__compiletime_assert' bool __cond = !(condition); \ ^~~~~~~~~ include/linux/compiler.h:518:2: note: in expansion of macro '_compiletime_assert' _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__) ^~~~~~~~~~~~~~~~~~~ include/linux/bug.h:54:37: note: in expansion of macro 'compiletime_assert' #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg) ^~~~~~~~~~~~~~~~~~ include/linux/bug.h:78:2: note: in expansion of macro 'BUILD_BUG_ON_MSG' BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition) ^~~~~~~~~~~~~~~~ >> arch/x86/kernel/kvm.c:630:2: note: in expansion of macro 'BUILD_BUG_ON' BUILD_BUG_ON((offsetof(struct kvm_steal_time, preempted) ^~~~~~~~~~~~ vim +/PREEMPTED_OFFSET +631 arch/x86/kernel/kvm.c 624 625 /* 626 * Setup pv_lock_ops to exploit KVM_FEATURE_PV_UNHALT if present. 627 */ 628 void __init kvm_spinlock_init(void) 629 { > 630 BUILD_BUG_ON((offsetof(struct kvm_steal_time, preempted) > 631 != PREEMPTED_OFFSET) || (sizeof(steal_time.preempted) != 1)); 632 633 if (!kvm_para_available()) 634 return; --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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