Subject: [PATCH 14/14] powerpc/64s: idle runlatch switch is done with MSR[EE]=0

From: Nicholas Piggin <[email-masked]>
Date: Fri, 9 Jun 2017 01:51:13 +1000

2*mfmsr and 2*mtmsr can be avoided in the idle sleep/wake code
because we know the MSR[EE] is clear.

Signed-off-by: Nicholas Piggin <[email-masked]>
---
 arch/powerpc/platforms/powernv/idle.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/arch/powerpc/platforms/powernv/idle.c b/arch/powerpc/platforms/powernv/idle.c
index 7c83a95f929e..8db49f9c2bd8 100644
--- a/arch/powerpc/platforms/powernv/idle.c
+++ b/arch/powerpc/platforms/powernv/idle.c
@@ -263,9 +263,9 @@ static unsigned long __power7_idle_type(unsigned long type)
 	if (!prep_irq_for_idle())
 		return 0;
 
-	ppc64_runlatch_off();
+	__ppc64_runlatch_off();
 	srr1 = power7_idle_insn(type);
-	ppc64_runlatch_on();
+	__ppc64_runlatch_on();
 
 	return srr1;
 }
@@ -300,9 +300,9 @@ static unsigned long __power9_idle_type(unsigned long stop_psscr_val,
 	psscr = mfspr(SPRN_PSSCR);
 	psscr = (psscr & ~stop_psscr_mask) | stop_psscr_val;
 
-	ppc64_runlatch_off();
+	__ppc64_runlatch_off();
 	srr1 = power9_idle_stop(psscr);
-	ppc64_runlatch_on();
+	__ppc64_runlatch_on();
 
 	trace_hardirqs_off();
 
@@ -336,7 +336,7 @@ unsigned long pnv_cpu_offline(unsigned int cpu)
 	unsigned long srr1;
 	u32 idle_states = pnv_get_supported_cpuidle_states();
 
-	ppc64_runlatch_off();
+	__ppc64_runlatch_off();
 
 	if (cpu_has_feature(CPU_FTR_ARCH_300) && deepest_stop_found) {
 		unsigned long psscr;
@@ -363,7 +363,7 @@ unsigned long pnv_cpu_offline(unsigned int cpu)
 		HMT_medium();
 	}
 
-	ppc64_runlatch_on();
+	__ppc64_runlatch_on();
 
 	return srr1;
 }
-- 
2.11.0