[PATCH 11/14] powerpc/64s: cpuidle read mostly for common globals

Nicholas Piggin npiggin at gmail.com
Mon Jun 12 09:58:32 AEST 2017


Ensure these don't get put into bouncing cachelines.

Signed-off-by: Nicholas Piggin <npiggin at gmail.com>
---
 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)
 {
-- 
2.11.0



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