diff -r 4c4b6a45be43 -r 1063026e8cee hotspot/src/cpu/ppc/vm/vtableStubs_ppc_64.cpp
--- a/hotspot/src/cpu/ppc/vm/vtableStubs_ppc_64.cpp	Thu Nov 21 12:30:35 2013 -0800
+++ b/hotspot/src/cpu/ppc/vm/vtableStubs_ppc_64.cpp	Thu Nov 21 18:29:34 2013 -0800
@@ -221,7 +221,7 @@
 
   // Must do an explicit check if implicit checks are disabled.
   assert(!MacroAssembler::needs_explicit_null_check(in_bytes(Method::from_compiled_offset())), "sanity");
-  if (!ImplicitNullChecks NOT_LINUX(|| true) /*!os::zero_page_read_protected()*/) {
+  if (!ImplicitNullChecks || !os::zero_page_read_protected()) {
     if (TrapBasedNullChecks) {
       __ trap_null_check(R19_method);
     } else {