[PATCH] kvm: x86: keep srcu writer side operation mutually exclusive

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



From: Peng Hao <flyingpeng@xxxxxxxxxxx>

Synchronization operations on the writer side of SRCU should be
invoked within the mutex.

Signed-off-by: Peng Hao <flyingpeng@xxxxxxxxxxx>
---
 arch/x86/kvm/pmu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kvm/pmu.c b/arch/x86/kvm/pmu.c
index 8a7dbe2c469a..619151849980 100644
--- a/arch/x86/kvm/pmu.c
+++ b/arch/x86/kvm/pmu.c
@@ -602,9 +602,9 @@ int kvm_vm_ioctl_set_pmu_event_filter(struct kvm
*kvm, void __user *argp)

        mutex_lock(&kvm->lock);
        filter = rcu_replace_pointer(kvm->arch.pmu_event_filter, filter, 1);
+       synchronize_srcu_expedited(&kvm->srcu);
        mutex_unlock(&kvm->lock);

-       synchronize_srcu_expedited(&kvm->srcu);
        r = 0;
 cleanup:
        kfree(filter);
--
2.27.0



[Index of Archives]     [KVM ARM]     [KVM ia64]     [KVM ppc]     [Virtualization Tools]     [Spice Development]     [Libvirt]     [Libvirt Users]     [Linux USB Devel]     [Linux Audio Users]     [Yosemite Questions]     [Linux Kernel]     [Linux SCSI]     [XFree86]

  Powered by Linux