ppc64: get rid of -fomit-frame-pointer and implement xics ibm,int-on

arch/ppc64/Kconfig

@@ -37,6 +37,10 @@ config COMPAT
 	bool
 	default y
 
+config FRAME_POINTER
+	bool
+	default y
+
 source "init/Kconfig"
 
 

arch/ppc64/kernel/xics.c

@@ -91,6 +91,7 @@ unsigned int default_distrib_server = 0;
 /* RTAS service tokens */
 int ibm_get_xive;
 int ibm_set_xive;
+int ibm_int_on;
 int ibm_int_off;
 
 struct xics_interrupt_node {
@@ -162,6 +163,14 @@ xics_enable_irq(
 		       irq, call_status, status);
 		return;
 	}
+	/* Now unmask the interrupt (often a no-op) */
+	call_status = rtas_call(ibm_int_on, 1, 1, (unsigned long*)&status, 
+				irq);
+	if( call_status != 0 ) {
+		printk("xics_disable_irq on: irq=%x: rtas_call failed, retn=%lx\n",
+		       irq, call_status);
+		return;
+	}
 }
 
 void
@@ -302,6 +311,7 @@ xics_init_IRQ( void )
 
 	ibm_get_xive = rtas_token("ibm,get-xive");
 	ibm_set_xive = rtas_token("ibm,set-xive");
+	ibm_int_on  = rtas_token("ibm,int-on");
 	ibm_int_off = rtas_token("ibm,int-off");
 
 	np = find_type_devices("PowerPC-External-Interrupt-Presentation");