cpuidle: Split cpuidle_state structure and move per-cpu statistics fields

This is the first step towards global registration of cpuidle
states. The statistics used primarily by the governor are per-cpu
and have to be split from rest of the fields inside cpuidle_state,
which would be made global i.e. single copy. The driver_data field
is also per-cpu and moved.

Signed-off-by: Deepthi Dharwar <deepthi@linux.vnet.ibm.com>
Signed-off-by: Trinabh Gupta <g.trinabh@gmail.com>
Tested-by: Jean Pihet <j-pihet@ti.com>
Reviewed-by: Kevin Hilman <khilman@ti.com>
Acked-by: Arjan van de Ven <arjan@linux.intel.com>
Acked-by: Kevin Hilman <khilman@ti.com>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 7 insertions, 6 deletions

diff --git a/arch/arm/mach-omap2/cpuidle34xx.c b/arch/arm/mach-omap2/cpuidle34xx.c
index 58425c75f1b8..d3fce7b97fcf 100644
--- a/arch/arm/mach-omap2/cpuidle34xx.c
+++ b/arch/arm/mach-omap2/cpuidle34xx.c
@@ -97,7 +97,7 @@ static int omap3_enter_idle(struct cpuidle_device *dev,
                                 int index)
 {
         struct omap3_idle_statedata *cx =
-                        cpuidle_get_statedata(&dev->states[index]);
+                        cpuidle_get_statedata(&dev->states_usage[index]);
         struct timespec ts_preidle, ts_postidle, ts_idle;
         u32 mpu_state = cx->mpu_state, core_state = cx->core_state;
         int idle_time;
@@ -160,8 +160,9 @@ return_sleep_time:
 static int next_valid_state(struct cpuidle_device *dev,
                                 int index)
 {
+        struct cpuidle_state_usage *curr_usage = &dev->states_usage[index];
         struct cpuidle_state *curr = &dev->states[index];
-        struct omap3_idle_statedata *cx = cpuidle_get_statedata(curr);
+        struct omap3_idle_statedata *cx = cpuidle_get_statedata(curr_usage);
         u32 mpu_deepest_state = PWRDM_POWER_RET;
         u32 core_deepest_state = PWRDM_POWER_RET;
         int next_index = -1;
@@ -202,7 +203,7 @@ static int next_valid_state(struct cpuidle_device *dev,
                  */
                 idx--;
                 for (; idx >= 0; idx--) {
-                        cx = cpuidle_get_statedata(&dev->states[idx]);
+                        cx = cpuidle_get_statedata(&dev->states_usage[idx]);
                         if ((cx->valid) &&
                             (cx->mpu_state >= mpu_deepest_state) &&
                             (cx->core_state >= core_deepest_state)) {
@@ -231,7 +232,6 @@ static int next_valid_state(struct cpuidle_device *dev,
 static int omap3_enter_idle_bm(struct cpuidle_device *dev,
                                int index)
 {
-        struct cpuidle_state *state = &dev->states[index];
         int new_state_idx;
         u32 core_next_state, per_next_state = 0, per_saved_state = 0, cam_state;
         struct omap3_idle_statedata *cx;
@@ -264,7 +264,7 @@ static int omap3_enter_idle_bm(struct cpuidle_device *dev,
          * Prevent PER off if CORE is not in retention or off as this
          * would disable PER wakeups completely.
          */
-        cx = cpuidle_get_statedata(state);
+        cx = cpuidle_get_statedata(&dev->states_usage[index]);
         core_next_state = cx->core_state;
         per_next_state = per_saved_state = pwrdm_read_next_pwrst(per_pd);
         if ((per_next_state == PWRDM_POWER_OFF) &&
@@ -318,6 +318,7 @@ static inline struct omap3_idle_statedata *_fill_cstate(
 {
         struct omap3_idle_statedata *cx = &omap3_idle_data[idx];
         struct cpuidle_state *state = &dev->states[idx];
+        struct cpuidle_state_usage *state_usage = &dev->states_usage[idx];
 
         state->exit_latency     = cpuidle_params_table[idx].exit_latency;
         state->target_residency = cpuidle_params_table[idx].target_residency;
@@ -326,7 +327,7 @@ static inline struct omap3_idle_statedata *_fill_cstate(
         cx->valid               = cpuidle_params_table[idx].valid;
         sprintf(state->name, "C%d", idx + 1);
         strncpy(state->desc, descr, CPUIDLE_DESC_LEN);
-        cpuidle_set_statedata(state, cx);
+        cpuidle_set_statedata(state_usage, cx);
 
         return cx;
 }