msm: Fix high load average from uninterruptible waits

 * The load average on all MSMs is currently hovering at around 14
   due to uninterruptible waits in various places.
 * Convert these waits to interruptible waits to bring the load
   back down to zero at idle.

Change-Id: I14bad4af135b1594e235e2252cb484cb34d91054
Signed-off-by: franciscofranco <[email protected]>
Signed-off-by: tarun93 <[email protected]>

arch/arm/mach-msm/rpm-smd.c

@@ -850,7 +850,7 @@ static void msm_rpm_smd_work(struct work_struct *work)
 	char buf[MAX_ERR_BUFFER_SIZE] = {0};
 
 	while (1) {
-		wait_for_completion(&data_ready);
+		wait_for_completion_interruptible(&data_ready);
 
 		spin_lock(&msm_rpm_data.smd_lock_read);
 		while (smd_is_pkt_avail(msm_rpm_data.ch_info)) {

drivers/thermal/msm_thermal.c

@@ -970,7 +970,7 @@ static __ref int do_hotplug(void *data)
 		return -EINVAL;
 
 	while (!kthread_should_stop()) {
-		wait_for_completion(&hotplug_notify_complete);
+		wait_for_completion_interruptible(&hotplug_notify_complete);
 		INIT_COMPLETION(hotplug_notify_complete);
 		mask = 0;
 
@@ -1404,7 +1404,7 @@ static __ref int do_freq_mitigation(void *data)
 	uint32_t cpu = 0, max_freq_req = 0, min_freq_req = 0;
 
 	while (!kthread_should_stop()) {
-		wait_for_completion(&freq_mitigation_complete);
+		wait_for_completion_interruptible(&freq_mitigation_complete);
 		INIT_COMPLETION(freq_mitigation_complete);
 
 		get_online_cpus();

drivers/video/msm/mdss/mdss_fb.c

@@ -1823,10 +1823,15 @@ static int __mdss_fb_display_thread(void *data)
 				mfd->index);
 
 	while (1) {
-		wait_event(mfd->commit_wait_q,
+		ret = wait_event_interruptible(mfd->commit_wait_q,
 				(atomic_read(&mfd->commits_pending) ||
 				 kthread_should_stop()));
 
+		if (ret) {
+			pr_info("%s: interrupted", __func__);
+			continue;
+		}
+
 		if (kthread_should_stop())
 			break;