Consolidate the various functions that read and write guest memory

Index: kvm/drivers/kvm/kvm_main.c
===================================================================
@@ -1082,7 +1082,7 @@
 				     const void *old,
 				     const void *new,
 				     unsigned int bytes,
-				     struct x86_emulate_ctxt *ctxt)
+				     struct kvm_vcpu *vcpu)
 {
 	static int reported;
 

@@ -1090,7 +1090,7 @@
 		reported = 1;
 		printk(KERN_WARNING "kvm: emulating exchange as write\n");
 	}
-	return emulator_write_emulated(addr, new, bytes, ctxt->vcpu);
+	return emulator_write_emulated(addr, new, bytes, vcpu);
 }
 
 static unsigned long get_segment_base(struct kvm_vcpu *vcpu, int seg)

Index: kvm/drivers/kvm/x86_emulate.c
===================================================================
@@ -1093,7 +1093,7 @@
 				rc = ops->cmpxchg_emulated((unsigned long)dst.
 							   ptr, &dst.orig_val,
 							   &dst.val, dst.bytes,
-							   ctxt);
+							   ctxt->vcpu);
 			else
 				rc = ops->write_emulated((unsigned long)dst.ptr,
 							 &dst.val, dst.bytes,

@@ -1392,7 +1392,7 @@
 				new = ((u64)_regs[VCPU_REGS_RCX] << 32)
 					| (u32) _regs[VCPU_REGS_RBX];
 				if ((rc = ops->cmpxchg_emulated(cr2, &old,
-							  &new, 8, ctxt)) != 0)
+							  &new, 8, ctxt->vcpu)) != 0)
 					goto done;
 				_eflags |= EFLG_ZF;
 			}

Index: kvm/drivers/kvm/x86_emulate.h
===================================================================
@@ -108,7 +108,7 @@
 				 const void *old,
 				 const void *new,
 				 unsigned int bytes,
-				 struct x86_emulate_ctxt * ctxt);
+				 struct kvm_vcpu *vcpu);
 
 };