diff --git a/arch/powerpc/kernel/udbg.c b/arch/powerpc/kernel/udbg.c
index 87703df87509..cbca1df8bc60 100644
--- a/arch/powerpc/kernel/udbg.c
+++ b/arch/powerpc/kernel/udbg.c
@@ -151,12 +151,18 @@ static struct console udbg_console = {
 
 static int early_console_initialized;
 
-/* called by setup_system */
+/*
+ * Called by setup_system after ppc_md->probe and ppc_md->early_init.
+ * Call it again after setting udbg_putc in ppc_md->setup_arch.
+ */
 void register_early_udbg_console(void)
 {
 	if (early_console_initialized)
 		return;
 
+	if (!udbg_putc)
+		return;
+
 	if (strstr(boot_command_line, "udbg-immortal")) {
 		printk(KERN_INFO "early console immortal !\n");
 		udbg_console.flags &= ~CON_BOOT;
diff --git a/arch/powerpc/platforms/powermac/setup.c b/arch/powerpc/platforms/powermac/setup.c
index 07b1c4ec428d..956571526a57 100644
--- a/arch/powerpc/platforms/powermac/setup.c
+++ b/arch/powerpc/platforms/powermac/setup.c
@@ -363,8 +363,19 @@ static void __init pmac_setup_arch(void)
 		smp_ops = &core99_smp_ops;
 	}
 #ifdef CONFIG_PPC32
-	else
+	else {
+		/*
+		 * We have to set bits in cpu_possible_map here since the
+		 * secondary CPU(s) aren't in the device tree, and
+		 * setup_per_cpu_areas only allocates per-cpu data for
+		 * CPUs in the cpu_possible_map.
+		 */
+		int cpu;
+
+		for (cpu = 1; cpu < 4 && cpu < NR_CPUS; ++cpu)
+			cpu_set(cpu, cpu_possible_map);
 		smp_ops = &psurge_smp_ops;
+	}
 #endif
 #endif /* CONFIG_SMP */
 
diff --git a/arch/powerpc/platforms/powermac/smp.c b/arch/powerpc/platforms/powermac/smp.c
index 686ed82bde79..cb2d894541c6 100644
--- a/arch/powerpc/platforms/powermac/smp.c
+++ b/arch/powerpc/platforms/powermac/smp.c
@@ -317,7 +317,6 @@ static int __init smp_psurge_probe(void)
 		ncpus = NR_CPUS;
 	for (i = 1; i < ncpus ; ++i) {
 		cpu_set(i, cpu_present_map);
-		cpu_set(i, cpu_possible_map);
 		set_hard_smp_processor_id(i, i);
 	}