diff -r f7f6fa8665e7 xen/arch/x86/mm/hap/p2m-ept.c
--- a/xen/arch/x86/mm/hap/p2m-ept.c	Thu Feb 03 11:56:05 2011 +0000
+++ b/xen/arch/x86/mm/hap/p2m-ept.c	Mon Feb 07 14:34:20 2011 +0000
@@ -395,10 +395,6 @@
     int i;
     int ret = 0;
     mfn_t mfn = _mfn(INVALID_MFN);
-    int do_locking = !p2m_locked_by_me(d->arch.p2m);
-
-    if ( do_locking )
-        p2m_lock(d->arch.p2m);
 
     *t = p2m_mmio_dm;
 
@@ -476,8 +472,6 @@
     }
 
 out:
-    if ( do_locking )
-        p2m_unlock(d->arch.p2m);
     unmap_domain_page(table);
     return mfn;
 }