--- src/sys/i386/i386/Attic/vm86.c	2005/11/22 04:09:38	1.17
+++ src/sys/i386/i386/Attic/vm86.c	2005/11/22 08:41:00	1.18
@@ -599,7 +599,7 @@ vm86_prepcall(struct vm86frame vmf)
  * to returning to the VM86 call.
  */
 void
-vm86_trap(struct vm86frame *vmf)
+vm86_trap(struct vm86frame *vmf, int have_mplock)
 {
 	caddr_t addr;
 
@@ -613,7 +613,8 @@ vm86_trap(struct vm86frame *vmf)
 	else
 		vmf->vmf_trapno = vmf->vmf_trapno << 16;
 
-	rel_mplock();
+	if (have_mplock)
+		rel_mplock();
 	vm86_biosret(vmf);
 }