--- a/hotspot/src/os_cpu/linux_ppc/vm/os_linux_ppc.cpp	Thu Dec 10 14:22:00 2015 +0100
+++ b/hotspot/src/os_cpu/linux_ppc/vm/os_linux_ppc.cpp	Mon Dec 14 02:29:11 2015 -0500
@@ -99,7 +99,7 @@
 // Frame information (pc, sp, fp) retrieved via ucontext
 // always looks like a C-frame according to the frame
 // conventions in frame_ppc64.hpp.
-address os::Linux::ucontext_get_pc(ucontext_t * uc) {
+address os::Linux::ucontext_get_pc(const ucontext_t * uc) {
   // On powerpc64, ucontext_t is not selfcontained but contains
   // a pointer to an optional substructure (mcontext_t.regs) containing the volatile
   // registers - NIP, among others.
@@ -122,19 +122,19 @@
   uc->uc_mcontext.regs->nip = (unsigned long)pc;
 }
 
-intptr_t* os::Linux::ucontext_get_sp(ucontext_t * uc) {
+intptr_t* os::Linux::ucontext_get_sp(const ucontext_t * uc) {
   return (intptr_t*)uc->uc_mcontext.regs->gpr[1/*REG_SP*/];
 }
 
-intptr_t* os::Linux::ucontext_get_fp(ucontext_t * uc) {
+intptr_t* os::Linux::ucontext_get_fp(const ucontext_t * uc) {
   return NULL;
 }
 
-ExtendedPC os::fetch_frame_from_context(void* ucVoid,
+ExtendedPC os::fetch_frame_from_context(const void* ucVoid,
                     intptr_t** ret_sp, intptr_t** ret_fp) {
 
   ExtendedPC  epc;
-  ucontext_t* uc = (ucontext_t*)ucVoid;
+  const ucontext_t* uc = (const ucontext_t*)ucVoid;
 
   if (uc != NULL) {
     epc = ExtendedPC(os::Linux::ucontext_get_pc(uc));
@@ -150,7 +150,7 @@
   return epc;
 }
 
-frame os::fetch_frame_from_context(void* ucVoid) {
+frame os::fetch_frame_from_context(const void* ucVoid) {
   intptr_t* sp;
   intptr_t* fp;
   ExtendedPC epc = fetch_frame_from_context(ucVoid, &sp, &fp);
@@ -564,10 +564,10 @@
 /////////////////////////////////////////////////////////////////////////////
 // helper functions for fatal error handler
 
-void os::print_context(outputStream *st, void *context) {
+void os::print_context(outputStream *st, const void *context) {
   if (context == NULL) return;
 
-  ucontext_t* uc = (ucontext_t*)context;
+  const ucontext_t* uc = (const ucontext_t*)context;
 
   st->print_cr("Registers:");
   st->print("pc =" INTPTR_FORMAT "  ", uc->uc_mcontext.regs->nip);
@@ -595,10 +595,10 @@
   st->cr();
 }
 
-void os::print_register_info(outputStream *st, void *context) {
+void os::print_register_info(outputStream *st, const void *context) {
   if (context == NULL) return;
 
-  ucontext_t *uc = (ucontext_t*)context;
+  const ucontext_t *uc = (const ucontext_t*)context;
 
   st->print_cr("Register to memory mapping:");
   st->cr();