sched/rt: Rename realtime_{prio, task}() to rt_or_dl_{prio, task}()

Some find the name realtime overloaded. Use rt_or_dl() as an
alternative, hopefully better, name.

Suggested-by: Daniel Bristot de Oliveira <bristot@redhat.com>
Signed-off-by: Qais Yousef <qyousef@layalina.io>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20240610192018.1567075-4-qyousef@layalina.io

kernel/locking/rtmutex.c

@@ -347,7 +347,7 @@ static __always_inline int __waiter_prio(struct task_struct *task)
 {
 	int prio = task->prio;
 
-	if (!realtime_prio(prio))
+	if (!rt_or_dl_prio(prio))
 		return DEFAULT_PRIO;
 
 	return prio;
@@ -435,7 +435,7 @@ static inline bool rt_mutex_steal(struct rt_mutex_waiter *waiter,
 	 * Note that RT tasks are excluded from same priority (lateral)
 	 * steals to prevent the introduction of an unbounded latency.
 	 */
-	if (realtime_prio(waiter->tree.prio))
+	if (rt_or_dl_prio(waiter->tree.prio))
 		return false;
 
 	return rt_waiter_node_equal(&waiter->tree, &top_waiter->tree);

kernel/locking/rwsem.c

@@ -631,7 +631,7 @@ static inline bool rwsem_try_write_lock(struct rw_semaphore *sem,
 			 * if it is an RT task or wait in the wait queue
 			 * for too long.
 			 */
-			if (has_handoff || (!realtime_task(waiter->task) &&
+			if (has_handoff || (!rt_or_dl_task(waiter->task) &&
 					    !time_after(jiffies, waiter->timeout)))
 				return false;
 
@@ -914,7 +914,7 @@ static bool rwsem_optimistic_spin(struct rw_semaphore *sem)
 		if (owner_state != OWNER_WRITER) {
 			if (need_resched())
 				break;
-			if (realtime_task(current) &&
+			if (rt_or_dl_task(current) &&
 			   (prev_owner_state != OWNER_WRITER))
 				break;
 		}

kernel/locking/ww_mutex.h

@@ -237,7 +237,7 @@ __ww_ctx_less(struct ww_acquire_ctx *a, struct ww_acquire_ctx *b)
 	int a_prio = a->task->prio;
 	int b_prio = b->task->prio;
 
-	if (realtime_prio(a_prio) || realtime_prio(b_prio)) {
+	if (rt_or_dl_prio(a_prio) || rt_or_dl_prio(b_prio)) {
 
 		if (a_prio > b_prio)
 			return true;