timers: Use already existing function for forwarding timer base

JIRA: https://issues.redhat.com/browse/RHEL-33787

commit 7a39a50
Author: Anna-Maria Behnsen <anna-maria@linutronix.de>
Date:   Fri Dec 1 10:26:32 2023 +0100

    timers: Use already existing function for forwarding timer base

    There is an already existing function for forwarding the timer
    base. Forwarding the timer base is implemented directly in
    get_next_timer_interrupt() as well.

    Remove the code duplication and invoke __forward_timer_base() instead.

    Signed-off-by: Anna-Maria Behnsen <anna-maria@linutronix.de>
    Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
    Reviewed-by: Frederic Weisbecker <frederic@kernel.org>
    Link: https://lore.kernel.org/r/20231201092654.34614-11-anna-maria@linutronix.de

Signed-off-by: Phil Auld <pauld@redhat.com>

Author: auldp

kernel/time/timer.c

@@ -1886,15 +1886,9 @@ u64 get_next_timer_interrupt(unsigned long basej, u64 basem)
 
 	/*
 	 * We have a fresh next event. Check whether we can forward the
-	 * base. We can only do that when @basej is past base->clk
-	 * otherwise we might rewind base->clk.
+	 * base.
 	 */
-	if (time_after(basej, base->clk)) {
-		if (time_after(nextevt, basej))
-			base->clk = basej;
-		else if (time_after(nextevt, base->clk))
-			base->clk = nextevt;
-	}
+	__forward_timer_base(base, basej);
 
 	if (time_before_eq(nextevt, basej)) {
 		expires = basem;