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kvm: Serialize wq active checks in kvm_vcpu_wake_up()
authorDavidlohr Bueso <dave@stgolabs.net>
Wed, 13 Sep 2017 20:08:22 +0000 (13:08 -0700)
committerPaolo Bonzini <pbonzini@redhat.com>
Fri, 15 Sep 2017 14:57:12 +0000 (16:57 +0200)
commit5a99c5188a9db8a633d932cd47b5d35fa6689f69
tree952ca6bfcd94135fa0c609f40f54a7a9ef603d04tree | snapshot
parent2c96d6f53a169449313a611e4dcbe83dd533e277commit | diff
kvm: Serialize wq active checks in kvm_vcpu_wake_up()

This is a generic call and can be suceptible to races
in reading the wq task_list while another task is adding
itself to the list. Add a full barrier by using the
swq_has_sleeper() helper.

Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
virt/kvm/kvm_main.c diff | blob | history
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