sched: walt: Leverage existing helper APIs to apply invariance

There's no need for a separate hierarchy of notifiers, APIs
and variables in walt.c for the purpose of applying frequency
and IPC invariance. Let's just use capacity_curr_of and get
rid of a lot of the infrastructure relating to capacity,
load_scale_factor etc.

Change-Id: Ia220e2c896373fa535db05bff60f9aa33aefc978
Signed-off-by: Vikram Mulukutla <markivx@codeaurora.org>

Author: Vikram Mulukutla

include/trace/events/sched.h

@@ -1045,7 +1045,6 @@ TRACE_EVENT(walt_update_task_ravg,
 		__array(	char,	comm,   TASK_COMM_LEN	)
 		__field(	pid_t,	pid			)
 		__field(	pid_t,	cur_pid			)
-		__field(unsigned int,	cur_freq		)
 		__field(	u64,	wallclock		)
 		__field(	u64,	mark_start		)
 		__field(	u64,	delta_m			)
@@ -1073,7 +1072,6 @@ TRACE_EVENT(walt_update_task_ravg,
 		__entry->evt            = evt;
 		__entry->cpu            = rq->cpu;
 		__entry->cur_pid        = rq->curr->pid;
-		__entry->cur_freq       = rq->cur_freq;
 		memcpy(__entry->comm, p->comm, TASK_COMM_LEN);
 		__entry->pid            = p->pid;
 		__entry->mark_start     = p->ravg.mark_start;
@@ -1092,11 +1090,10 @@ TRACE_EVENT(walt_update_task_ravg,
 		__entry->active_windows	= p->ravg.active_windows;
 	),
 
-	TP_printk("wc %llu ws %llu delta %llu event %d cpu %d cur_freq %u cur_pid %d task %d (%s) ms %llu delta %llu demand %u sum %u irqtime %llu"
+	TP_printk("wc %llu ws %llu delta %llu event %d cpu %d cur_pid %d task %d (%s) ms %llu delta %llu demand %u sum %u irqtime %llu"
 		" cs %llu ps %llu util %lu cur_window %u prev_window %u active_wins %u"
 		, __entry->wallclock, __entry->win_start, __entry->delta,
-		__entry->evt, __entry->cpu,
-		__entry->cur_freq, __entry->cur_pid,
+		__entry->evt, __entry->cpu, __entry->cur_pid,
 		__entry->pid, __entry->comm, __entry->mark_start,
 		__entry->delta_m, __entry->demand,
 		__entry->sum, __entry->irqtime,

kernel/sched/core.c

@@ -7702,7 +7702,6 @@ void __init sched_init_smp(void)
 {
 	cpumask_var_t non_isolated_cpus;
 
-	walt_init_cpu_efficiency();
 	alloc_cpumask_var(&non_isolated_cpus, GFP_KERNEL);
 	alloc_cpumask_var(&fallback_doms, GFP_KERNEL);
 

kernel/sched/sched.h

@@ -673,18 +673,7 @@ struct rq {
 #endif
 
 #ifdef CONFIG_SCHED_WALT
-	/*
-	 * max_freq = user or thermal defined maximum
-	 * max_possible_freq = maximum supported by hardware
-	 */
-	unsigned int cur_freq, max_freq, min_freq, max_possible_freq;
-	struct cpumask freq_domain_cpumask;
-
 	u64 cumulative_runnable_avg;
-	int efficiency; /* Differentiate cpus with different IPC capability */
-	int load_scale_factor;
-	int capacity;
-	int max_possible_capacity;
 	u64 window_start;
 	u64 curr_runnable_sum;
 	u64 prev_runnable_sum;