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    Subject[PATCH 3/7] KVM: Replace smp_mb() with smp_mb_after_atomic() in the kvm_make_all_cpus_request()
    Date
    Signed-off-by: Lan Tianyu <tianyu.lan@intel.com>
    ---
    virt/kvm/kvm_main.c | 4 ++--
    1 file changed, 2 insertions(+), 2 deletions(-)

    diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
    index 1eae052..ec5aa8d 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)
    --
    1.8.4.rc0.1.g8f6a3e5.dirty
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