[PATCH][v4] powerpc: move epapr paravirt init of power_save to an initcall

[Stuart Yoder <stuart.yoder@freescale.com>]

From: Stuart Yoder <stuart.yoder@freescale.com>

some restructuring of epapr paravirt init resulted in
ppc_md.power_save being set, and then overwritten to
NULL during machine_init.  This patch splits the
initialization of ppc_md.power_save out into a postcore
init call.

Signed-off-by: Stuart Yoder <stuart.yoder@freescale.com>
---
-v3
   -changed approach slightly, set flag in the dt scanning
    code and just look at that flag in the initcall
-v4
   -made idle flag static

 arch/powerpc/kernel/epapr_paravirt.c |   12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/arch/powerpc/kernel/epapr_paravirt.c b/arch/powerpc/kernel/epapr_paravirt.c
index 7898be9..8a7a62c 100644
--- a/arch/powerpc/kernel/epapr_paravirt.c
+++ b/arch/powerpc/kernel/epapr_paravirt.c
@@ -30,6 +30,7 @@ extern u32 epapr_ev_idle_start[];
 #endif
 
 bool epapr_paravirt_enabled;
+static bool epapr_has_idle;
 
 static int __init early_init_dt_scan_epapr(unsigned long node,
 					   const char *uname,
@@ -55,7 +56,7 @@ static int __init early_init_dt_scan_epapr(unsigned long node,
 
 #if !defined(CONFIG_64BIT) || defined(CONFIG_PPC_BOOK3E_64)
 	if (of_get_flat_dt_prop(node, "has-idle", NULL))
-		ppc_md.power_save = epapr_ev_idle;
+		epapr_has_idle = true;
 #endif
 
 	epapr_paravirt_enabled = true;
@@ -70,3 +71,12 @@ int __init epapr_paravirt_early_init(void)
 	return 0;
 }
 
+static int __init epapr_idle_init(void)
+{
+	if (epapr_has_idle)
+		ppc_md.power_save = epapr_ev_idle;
+
+	return 0;
+}
+
+postcore_initcall(epapr_idle_init);
-- 
1.7.9.7