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KVM: use __copy_to_user/__clear_user to write guest page

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Simply use __copy_to_user/__clear_user to write guest page since we have
already verified the user address when the memslot is set

Signed-off-by: Xiao Guangrong <[email protected]>
Signed-off-by: Marcelo Tosatti <[email protected]>
This commit is contained in:
Xiao Guangrong 2011-05-15 23:22:04 +08:00 • committed by Avi Kivity
commit 8b0cedff04
2 changed files with 4 additions and 4 deletions
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4
virt/kvm/kvm_main.c
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@ -1345,7 +1345,7 @@ int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
addr = gfn_to_hva(kvm, gfn);
if (kvm_is_error_hva(addr))
return -EFAULT;
r = copy_to_user((void __user *)addr + offset, data, len);
r = __copy_to_user((void __user *)addr + offset, data, len);
if (r)
return -EFAULT;
mark_page_dirty(kvm, gfn);
@ -1405,7 +1405,7 @@ int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
if (kvm_is_error_hva(ghc->hva))
return -EFAULT;
r = copy_to_user((void __user *)ghc->hva, data, len);
r = __copy_to_user((void __user *)ghc->hva, data, len);
if (r)
return -EFAULT;
mark_page_dirty_in_slot(kvm, ghc->memslot, ghc->gpa >> PAGE_SHIFT);