sched/fair: Use protect_slice() instead of direct comparison

Replace the test by the relevant protect_slice() function.

Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Dhaval Giani (AMD) <dhaval@gianis.ca>
Link: https://lkml.kernel.org/r/20250708165630.1948751-2-vincent.guittot@linaro.org

Author: vingu-linaro

kernel/sched/fair.c

@@ -1161,7 +1161,7 @@ static inline bool did_preempt_short(struct cfs_rq *cfs_rq, struct sched_entity
 	if (!sched_feat(PREEMPT_SHORT))
 		return false;
 
-	if (curr->vlag == curr->deadline)
+	if (protect_slice(curr))
 		return false;
 
 	return !entity_eligible(cfs_rq, curr);