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| author |   Avi Kivity <avi@redhat.com> | 2010-02-18 11:25:22 +0200 |
|---|---|---|
| committer |   Marcelo Tosatti <mtosatti@redhat.com> | 2010-03-01 12:36:13 -0300 |
| commit | 70e335e16882df5b5d6971022e63c3603a1e8c23 (patch) | |
| tree | a15adffbba25223c7232a6b349a5307cdcad48bf /virt | |
| parent | KVM: Convert i8254/i8259 locks to raw_spinlocks (diff) | |
| download | linux-dev-70e335e16882df5b5d6971022e63c3603a1e8c23.tar.xz linux-dev-70e335e16882df5b5d6971022e63c3603a1e8c23.zip | |
KVM: Convert kvm->requests_lock to raw_spinlock_t
The code relies on kvm->requests_lock inhibiting preemption.
Noted by Jan Kiszka.
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'virt')
| -rw-r--r-- | virt/kvm/kvm_main.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 0a360c26cc34..548f9253c195 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -138,7 +138,7 @@ static bool make_all_cpus_request(struct kvm *kvm, unsigned int req) zalloc_cpumask_var(&cpus, GFP_ATOMIC); - spin_lock(&kvm->requests_lock); + raw_spin_lock(&kvm->requests_lock); me = smp_processor_id(); kvm_for_each_vcpu(i, vcpu, kvm) { if (test_and_set_bit(req, &vcpu->requests)) @@ -153,7 +153,7 @@ static bool make_all_cpus_request(struct kvm *kvm, unsigned int req) smp_call_function_many(cpus, ack_flush, NULL, 1); else called = false; - spin_unlock(&kvm->requests_lock); + raw_spin_unlock(&kvm->requests_lock); free_cpumask_var(cpus); return called; } @@ -409,7 +409,7 @@ static struct kvm *kvm_create_vm(void) kvm->mm = current->mm; atomic_inc(&kvm->mm->mm_count); spin_lock_init(&kvm->mmu_lock); - spin_lock_init(&kvm->requests_lock); + raw_spin_lock_init(&kvm->requests_lock); kvm_eventfd_init(kvm); mutex_init(&kvm->lock); mutex_init(&kvm->irq_lock); |