diff options
| author | Sean Christopherson <sean.j.christopherson@intel.com> | 2019-12-19 00:55:29 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-01-27 21:59:33 +0300 |
| commit | 9941d224fb7c765bc20f3cb6c747786adc5cd002 (patch) | |
| tree | daadd4f59f88daaaed08c79e1bb5ba63e58b55ea /virt | |
| parent | ddd259c9aaba08244dba8877687ee856f79c4f45 (diff) | |
| download | linux-9941d224fb7c765bc20f3cb6c747786adc5cd002.tar.xz | |
KVM: Move putting of vcpu->pid to kvm_vcpu_destroy()
Move the putting of vcpu->pid to kvm_vcpu_destroy(). vcpu->pid is
guaranteed to be NULL when kvm_vcpu_uninit() is called in the error path
of kvm_vm_ioctl_create_vcpu(), e.g. it is explicitly nullified by
kvm_vcpu_init() and is only changed by KVM_RUN.
No functional change intended.
Acked-by: Christoffer Dall <christoffer.dall@arm.com>
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'virt')
| -rw-r--r-- | virt/kvm/kvm_main.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 6b496038cd7f..483b6b8e70a1 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -352,12 +352,6 @@ static int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id) static void kvm_vcpu_uninit(struct kvm_vcpu *vcpu) { - /* - * no need for rcu_read_lock as VCPU_RUN is the only place that - * will change the vcpu->pid pointer and on uninit all file - * descriptors are already gone. - */ - put_pid(rcu_dereference_protected(vcpu->pid, 1)); free_page((unsigned long)vcpu->run); } @@ -365,6 +359,13 @@ void kvm_vcpu_destroy(struct kvm_vcpu *vcpu) { kvm_arch_vcpu_destroy(vcpu); + /* + * No need for rcu_read_lock as VCPU_RUN is the only place that changes + * the vcpu->pid pointer, and at destruction time all file descriptors + * are already gone. + */ + put_pid(rcu_dereference_protected(vcpu->pid, 1)); + kvm_vcpu_uninit(vcpu); kmem_cache_free(kvm_vcpu_cache, vcpu); } |