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[3/7] KVM: Replace smp_mb() with smp_mb_after_atomic() in the kvm_make_all_cpus_request()

Message ID 1457838631-26775-4-git-send-email-tianyu.lan@intel.com (mailing list archive)
State New, archived
Headers show

Commit Message

lan,Tianyu March 13, 2016, 3:10 a.m. UTC 
Signed-off-by: Lan Tianyu <tianyu.lan@intel.com>
---
 virt/kvm/kvm_main.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
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Patch

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)