diff options
| author | Michal Luczaj <mhal@rbox.co> | 2023-01-07 01:12:53 +0100 |
|---|---|---|
| committer | Sean Christopherson <seanjc@google.com> | 2023-02-03 15:30:32 -0800 |
| commit | 4d85cfcaa82f0ceb5dcb7ad369a2cc7efb32c65c (patch) | |
| tree | d353abb30029116ac030cd4d0dd364661a4d8bee /arch/x86/kvm/x86.c | |
| parent | 708f799d22fe6b69d2e6e3e0625c30666d5e798a (diff) | |
KVM: x86: Simplify msr_filter update
Replace srcu_dereference()+rcu_assign_pointer() sequence with
a single rcu_replace_pointer().
Suggested-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Michal Luczaj <mhal@rbox.co>
Link: https://lore.kernel.org/r/20230107001256.2365304-4-mhal@rbox.co
Signed-off-by: Sean Christopherson <seanjc@google.com>
Diffstat (limited to 'arch/x86/kvm/x86.c')
| -rw-r--r-- | arch/x86/kvm/x86.c | 5 |
1 files changed, 1 insertions, 4 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 4f8e78d49585..9c66cb3657b4 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -6492,11 +6492,8 @@ static int kvm_vm_ioctl_set_msr_filter(struct kvm *kvm, } mutex_lock(&kvm->lock); - /* The per-VM filter is protected by kvm->lock... */ - old_filter = srcu_dereference_check(kvm->arch.msr_filter, &kvm->srcu, 1); - - rcu_assign_pointer(kvm->arch.msr_filter, new_filter); + old_filter = rcu_replace_pointer(kvm->arch.msr_filter, new_filter, 1); mutex_unlock(&kvm->lock); synchronize_srcu(&kvm->srcu); |