From: Lan Tianyu Date: Sun, 13 Mar 2016 03:10:26 +0000 (+0800) Subject: KVM: Replace smp_mb() with smp_mb_after_atomic() in the kvm_make_all_cpus_request() X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=a30a0509165d9bc5a3107894338e6adf4be7b60f;p=deliverable%2Flinux.git KVM: Replace smp_mb() with smp_mb_after_atomic() in the kvm_make_all_cpus_request() Signed-off-by: Lan Tianyu Signed-off-by: Paolo Bonzini --- diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index db021c383aa7..402590dfcf9b 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -170,8 +170,8 @@ bool kvm_make_all_cpus_request(struct kvm *kvm, unsigned int req) kvm_make_request(req, vcpu); cpu = vcpu->cpu; - /* Set ->requests bit before we read ->mode */ - smp_mb(); + /* Set ->requests bit before we read ->mode. */ + smp_mb__after_atomic(); if (cpus != NULL && cpu != -1 && cpu != me && kvm_vcpu_exiting_guest_mode(vcpu) != OUTSIDE_GUEST_MODE)