From 624e46d03576dd4d5667bad9d2ef814135d0075c Mon Sep 17 00:00:00 2001

From: Nicholas Piggin <npiggin@gmail.com>

Date: Wed, 14 Jun 2017 23:02:40 +1000

Subject: [PATCH] cpuidle: powerpc: read mostly for common globals

References: PED-3947 bsc#1210544 ltc#202303

Patch-mainline: v4.13-rc1

Git-commit: 624e46d03576dd4d5667bad9d2ef814135d0075c

Ensure these don't get put into bouncing cachelines.

Reviewed-by: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>

Reviewed-by: Gautham R. Shenoy <ego@linux.vnet.ibm.com>

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

Acked-by: Michal Suchanek <msuchanek@suse.de>

---

 drivers/cpuidle/cpuidle-powernv.c | 10 +++++-----

 drivers/cpuidle/cpuidle-pseries.c |  8 ++++----

 2 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/drivers/cpuidle/cpuidle-powernv.c b/drivers/cpuidle/cpuidle-powernv.c

index 50b3c2e0306f..9d03326ac05e 100644

--- a/drivers/cpuidle/cpuidle-powernv.c

+++ b/drivers/cpuidle/cpuidle-powernv.c

@@ -32,18 +32,18 @@ static struct cpuidle_driver powernv_idle_driver = {

 	.owner            = THIS_MODULE,

 };

-static int max_idle_state;

-static struct cpuidle_state *cpuidle_state_table;

+static int max_idle_state __read_mostly;

+static struct cpuidle_state *cpuidle_state_table __read_mostly;

 struct stop_psscr_table {

 	u64 val;

 	u64 mask;

 };

-static struct stop_psscr_table stop_psscr_table[CPUIDLE_STATE_MAX];

+static struct stop_psscr_table stop_psscr_table[CPUIDLE_STATE_MAX] __read_mostly;

-static u64 snooze_timeout;

-static bool snooze_timeout_en;

+static u64 snooze_timeout __read_mostly;

+static bool snooze_timeout_en __read_mostly;

 static int snooze_loop(struct cpuidle_device *dev,

 			struct cpuidle_driver *drv,

diff --git a/drivers/cpuidle/cpuidle-pseries.c b/drivers/cpuidle/cpuidle-pseries.c

index 7b12bb2ea70f..a404f352d284 100644

--- a/drivers/cpuidle/cpuidle-pseries.c

+++ b/drivers/cpuidle/cpuidle-pseries.c

@@ -25,10 +25,10 @@ struct cpuidle_driver pseries_idle_driver = {

 	.owner            = THIS_MODULE,

 };

-static int max_idle_state;

-static struct cpuidle_state *cpuidle_state_table;

-static u64 snooze_timeout;

-static bool snooze_timeout_en;

+static int max_idle_state __read_mostly;

+static struct cpuidle_state *cpuidle_state_table __read_mostly;

+static u64 snooze_timeout __read_mostly;

+static bool snooze_timeout_en __read_mostly;

 static inline void idle_loop_prolog(unsigned long *in_purr)

 {

-- 

2.40.0