timers: Replace in_irq() with in_hardirq()

Replace the obsolete and ambiguous macro in_irq() with new
macro in_hardirq().

Signed-off-by: ye xingchen <ye.xingchen@zte.com.cn>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: John Stultz <jstultz@google.com>
Link: https://lore.kernel.org/r/20221012012629.334966-1-ye.xingchen@zte.com.cn

kernel/time/timer.c

@@ -1422,7 +1422,7 @@ int del_timer_sync(struct timer_list *timer)
 	 * don't use it in hardirq context, because it
 	 * could lead to deadlock.
 	 */
-	WARN_ON(in_irq() && !(timer->flags & TIMER_IRQSAFE));
+	WARN_ON(in_hardirq() && !(timer->flags & TIMER_IRQSAFE));
 
 	/*
 	 * Must be able to sleep on PREEMPT_RT because of the slowpath in