Re: [PATCH] KVM: remove unused code in kvm_coalesced_mmio_init()

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On 04/12/2010 12:34 PM, wzt.wzt@xxxxxxxxx wrote:
ret is already set as ENOMEM before, so the second ret = -ENOMEM; can be removed.


diff --git a/virt/kvm/coalesced_mmio.c b/virt/kvm/coalesced_mmio.c
index 5169736..c0dcfb7 100644
--- a/virt/kvm/coalesced_mmio.c
+++ b/virt/kvm/coalesced_mmio.c
@@ -101,7 +101,6 @@ int kvm_coalesced_mmio_init(struct kvm *kvm)
  		goto out_err;
  	kvm->coalesced_mmio_ring = page_address(page);

-	ret = -ENOMEM;
  	dev = kzalloc(sizeof(struct kvm_coalesced_mmio_dev), GFP_KERNEL);
  	if (!dev)
  		goto out_free_page;

I prefer to keep it there and let the compiler do the elimination. Otherwise inserting any code in the middle may cause a bug (the assignment is logically part of the code block, it only matches the previous one by accident).

--
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.

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