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kvm: Make init_rmode_identity_map() return 0 on success.

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In init_rmode_identity_map(), there two variables indicating the return
value, r and ret, and it return 0 on error, 1 on success. The function
is only called by vmx_create_vcpu(), and ret is redundant.

This patch removes the redundant variable, and makes init_rmode_identity_map()
return 0 on success, -errno on failure.

Signed-off-by: Tang Chen <tangchen@cn.fujitsu.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Tang Chen 2014-09-16 18:41:59 +08:00 committed by Paolo Bonzini
parent a255d4795f
commit f51770ed46
1 changed files with 8 additions and 10 deletions
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18
arch/x86/kvm/vmx.c
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@ -3963,25 +3963,23 @@ out:
static int init_rmode_identity_map(struct kvm *kvm)
{
int i, idx, r, ret = 0;
int i, idx, r = 0;
pfn_t identity_map_pfn;
u32 tmp;
if (!enable_ept)
return 1;
return 0;
/* Protect kvm->arch.ept_identity_pagetable_done. */
mutex_lock(&kvm->slots_lock);
if (likely(kvm->arch.ept_identity_pagetable_done)) {
ret = 1;
if (likely(kvm->arch.ept_identity_pagetable_done))
goto out2;
}
identity_map_pfn = kvm->arch.ept_identity_map_addr >> PAGE_SHIFT;
r = alloc_identity_pagetable(kvm);
if (r)
if (r < 0)
goto out2;
idx = srcu_read_lock(&kvm->srcu);
@ -3998,13 +3996,13 @@ static int init_rmode_identity_map(struct kvm *kvm)
goto out;
}
kvm->arch.ept_identity_pagetable_done = true;
ret = 1;
out:
srcu_read_unlock(&kvm->srcu, idx);
out2:
mutex_unlock(&kvm->slots_lock);
return ret;
return r;
}
static void seg_setup(int seg)
@ -7756,8 +7754,8 @@ static struct kvm_vcpu *vmx_create_vcpu(struct kvm *kvm, unsigned int id)
if (!kvm->arch.ept_identity_map_addr)
kvm->arch.ept_identity_map_addr =
VMX_EPT_IDENTITY_PAGETABLE_ADDR;
err = -ENOMEM;
if (!init_rmode_identity_map(kvm))
err = init_rmode_identity_map(kvm);
if (err)
goto free_vmcs;
}