timekeeping: remove xtime_update

There are no more users of xtime_update aside from legacy_timer_tick(),
so fold it into that function and remove the declaration.

update_process_times() is now only called inside of the kernel/time/
code, so the declaration can be moved there.

Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Tested-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 20 insertions, 2 deletions

diff --git a/kernel/time/tick-legacy.c b/kernel/time/tick-legacy.c
index 73c5a0af474337..af225b32f5b37e 100644
--- a/kernel/time/tick-legacy.c
+++ b/kernel/time/tick-legacy.c
@@ -10,10 +10,28 @@
 
 #include "tick-internal.h"
 
+/**
+ * legacy_timer_tick() - advances the timekeeping infrastructure
+ * @ticks:	number of ticks, that have elapsed since the last call.
+ *
+ * This is used by platforms that have not been converted to
+ * generic clockevents.
+ *
+ * If 'ticks' is zero, the CPU is not handling timekeeping, so
+ * only perform process accounting and profiling.
+ *
+ * Must be called with interrupts disabled.
+ */
 void legacy_timer_tick(unsigned long ticks)
 {
-	if (ticks)
-		xtime_update(ticks);
+	if (ticks) {
+		raw_spin_lock(&jiffies_lock);
+		write_seqcount_begin(&jiffies_seq);
+		do_timer(ticks);
+		write_seqcount_end(&jiffies_seq);
+		raw_spin_unlock(&jiffies_lock);
+		update_wall_time();
+	}
 	update_process_times(user_mode(get_irq_regs()));
 	profile_tick(CPU_PROFILING);
 }