KVM: convert slots_lock to a mutex

[firefly-linux-kernel-4.4.55.git] / arch / x86 / kvm / x86.c

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 53bc06a68105644eaf6d43679a319053ce8bf9b9..aff3479867a8f34bba84e3d83cd44a17bc1cac54 100644 (file)
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -2208,14 +2208,14 @@ static int kvm_vm_ioctl_set_nr_mmu_pages(struct kvm *kvm,
        if (kvm_nr_mmu_pages < KVM_MIN_ALLOC_MMU_PAGES)
                return -EINVAL;
 
-       down_write(&kvm->slots_lock);
+       mutex_lock(&kvm->slots_lock);
        spin_lock(&kvm->mmu_lock);
 
        kvm_mmu_change_mmu_pages(kvm, kvm_nr_mmu_pages);
        kvm->arch.n_requested_mmu_pages = kvm_nr_mmu_pages;
 
        spin_unlock(&kvm->mmu_lock);
-       up_write(&kvm->slots_lock);
+       mutex_unlock(&kvm->slots_lock);
        return 0;
 }
 
@@ -2292,7 +2292,7 @@ static int kvm_vm_ioctl_set_memory_alias(struct kvm *kvm,
        if (!aliases)
                goto out;
 
-       down_write(&kvm->slots_lock);
+       mutex_lock(&kvm->slots_lock);
 
        /* invalidate any gfn reference in case of deletion/shrinking */
        memcpy(aliases, kvm->arch.aliases, sizeof(struct kvm_mem_aliases));
@@ -2328,7 +2328,7 @@ static int kvm_vm_ioctl_set_memory_alias(struct kvm *kvm,
        r = 0;
 
 out_unlock:
-       up_write(&kvm->slots_lock);
+       mutex_unlock(&kvm->slots_lock);
 out:
        return r;
 }
@@ -2462,7 +2462,7 @@ int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
        unsigned long is_dirty = 0;
        unsigned long *dirty_bitmap = NULL;
 
-       down_write(&kvm->slots_lock);
+       mutex_lock(&kvm->slots_lock);
 
        r = -EINVAL;
        if (log->slot >= KVM_MEMORY_SLOTS)
@@ -2512,7 +2512,7 @@ int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
 out_free:
        vfree(dirty_bitmap);
 out:
-       up_write(&kvm->slots_lock);
+       mutex_unlock(&kvm->slots_lock);
        return r;
 }
 
@@ -2625,7 +2625,7 @@ long kvm_arch_vm_ioctl(struct file *filp,
                                   sizeof(struct kvm_pit_config)))
                        goto out;
        create_pit:
-               down_write(&kvm->slots_lock);
+               mutex_lock(&kvm->slots_lock);
                r = -EEXIST;
                if (kvm->arch.vpit)
                        goto create_pit_unlock;
@@ -2634,7 +2634,7 @@ long kvm_arch_vm_ioctl(struct file *filp,
                if (kvm->arch.vpit)
                        r = 0;
        create_pit_unlock:
-               up_write(&kvm->slots_lock);
+               mutex_unlock(&kvm->slots_lock);
                break;
        case KVM_IRQ_LINE_STATUS:
        case KVM_IRQ_LINE: {