sched: Fix various typos in comments

Go over the scheduler source code and fix common typos
in comments - and a typo in an actual variable name.

No change in functionality intended.

Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>

kernel/sched/core.c

@@ -2857,7 +2857,7 @@ unsigned long nr_running(void)
  * preemption, thus the result might have a time-of-check-to-time-of-use
  * race.  The caller is responsible to use it correctly, for example:
  *
- * - from a non-preemptable section (of course)
+ * - from a non-preemptible section (of course)
  *
  * - from a thread that is bound to a single CPU
  *

kernel/sched/cputime.c

@@ -525,7 +525,7 @@ void account_idle_ticks(unsigned long ticks)
 
 /*
  * Perform (stime * rtime) / total, but avoid multiplication overflow by
- * loosing precision when the numbers are big.
+ * losing precision when the numbers are big.
  */
 static u64 scale_stime(u64 stime, u64 rtime, u64 total)
 {

kernel/sched/deadline.c

@@ -727,7 +727,7 @@ static void replenish_dl_entity(struct sched_dl_entity *dl_se,
  * refill the runtime and set the deadline a period in the future,
  * because keeping the current (absolute) deadline of the task would
  * result in breaking guarantees promised to other tasks (refer to
- * Documentation/scheduler/sched-deadline.txt for more informations).
+ * Documentation/scheduler/sched-deadline.txt for more information).
  *
  * This function returns true if:
  *

kernel/sched/fair.c

@@ -703,9 +703,9 @@ void init_entity_runnable_average(struct sched_entity *se)
 	memset(sa, 0, sizeof(*sa));
 
 	/*
-	 * Tasks are intialized with full load to be seen as heavy tasks until
+	 * Tasks are initialized with full load to be seen as heavy tasks until
 	 * they get a chance to stabilize to their real load level.
-	 * Group entities are intialized with zero load to reflect the fact that
+	 * Group entities are initialized with zero load to reflect the fact that
 	 * nothing has been attached to the task group yet.
 	 */
 	if (entity_is_task(se))
@@ -3976,8 +3976,8 @@ dequeue_entity(struct cfs_rq *cfs_rq, struct sched_entity *se, int flags)
 	/*
 	 * When dequeuing a sched_entity, we must:
 	 *   - Update loads to have both entity and cfs_rq synced with now.
-	 *   - Substract its load from the cfs_rq->runnable_avg.
-	 *   - Substract its previous weight from cfs_rq->load.weight.
+	 *   - Subtract its load from the cfs_rq->runnable_avg.
+	 *   - Subtract its previous weight from cfs_rq->load.weight.
 	 *   - For group entity, update its weight to reflect the new share
 	 *     of its group cfs_rq.
 	 */

kernel/sched/isolation.c

@@ -8,14 +8,14 @@
  */
 #include "sched.h"
 
-DEFINE_STATIC_KEY_FALSE(housekeeping_overriden);
-EXPORT_SYMBOL_GPL(housekeeping_overriden);
+DEFINE_STATIC_KEY_FALSE(housekeeping_overridden);
+EXPORT_SYMBOL_GPL(housekeeping_overridden);
 static cpumask_var_t housekeeping_mask;
 static unsigned int housekeeping_flags;
 
 int housekeeping_any_cpu(enum hk_flags flags)
 {
-	if (static_branch_unlikely(&housekeeping_overriden))
+	if (static_branch_unlikely(&housekeeping_overridden))
 		if (housekeeping_flags & flags)
 			return cpumask_any_and(housekeeping_mask, cpu_online_mask);
 	return smp_processor_id();
@@ -24,7 +24,7 @@ EXPORT_SYMBOL_GPL(housekeeping_any_cpu);
 
 const struct cpumask *housekeeping_cpumask(enum hk_flags flags)
 {
-	if (static_branch_unlikely(&housekeeping_overriden))
+	if (static_branch_unlikely(&housekeeping_overridden))
 		if (housekeeping_flags & flags)
 			return housekeeping_mask;
 	return cpu_possible_mask;
@@ -33,7 +33,7 @@ EXPORT_SYMBOL_GPL(housekeeping_cpumask);
 
 void housekeeping_affine(struct task_struct *t, enum hk_flags flags)
 {
-	if (static_branch_unlikely(&housekeeping_overriden))
+	if (static_branch_unlikely(&housekeeping_overridden))
 		if (housekeeping_flags & flags)
 			set_cpus_allowed_ptr(t, housekeeping_mask);
 }
@@ -41,7 +41,7 @@ EXPORT_SYMBOL_GPL(housekeeping_affine);
 
 bool housekeeping_test_cpu(int cpu, enum hk_flags flags)
 {
-	if (static_branch_unlikely(&housekeeping_overriden))
+	if (static_branch_unlikely(&housekeeping_overridden))
 		if (housekeeping_flags & flags)
 			return cpumask_test_cpu(cpu, housekeeping_mask);
 	return true;
@@ -53,7 +53,7 @@ void __init housekeeping_init(void)
 	if (!housekeeping_flags)
 		return;
 
-	static_branch_enable(&housekeeping_overriden);
+	static_branch_enable(&housekeeping_overridden);
 
 	if (housekeeping_flags & HK_FLAG_TICK)
 		sched_tick_offload_init();

kernel/sched/sched.h

@@ -637,7 +637,7 @@ struct dl_rq {
 	/*
 	 * Deadline values of the currently executing and the
 	 * earliest ready task on this rq. Caching these facilitates
-	 * the decision wether or not a ready but not running task
+	 * the decision whether or not a ready but not running task
 	 * should migrate somewhere else.
 	 */
 	struct {
@@ -1434,7 +1434,7 @@ static inline void __set_task_cpu(struct task_struct *p, unsigned int cpu)
 #ifdef CONFIG_SMP
 	/*
 	 * After ->cpu is set up to a new value, task_rq_lock(p, ...) can be
-	 * successfuly executed on another CPU. We must ensure that updates of
+	 * successfully executed on another CPU. We must ensure that updates of
 	 * per-task data have been completed by this moment.
 	 */
 	smp_wmb();