time_init() enables interrupt.

[Atsushi Nemoto <nemoto@toshiba-tops.co.jp>]

arch/mips/kernel/time.c:time_init() in current CVS contains following codes:

        /* setup xtime */
        write_lock_irq(&xtime_lock);
        xtime.tv_sec = rtc_get_time();
        xtime.tv_usec = 0;
        write_unlock_irq(&xtime_lock);

The write_unlock_irq() macro calls __sti(), but it is too early to
enable interrupts.

I think this write_lock_irq/write_unlock_irq pair should be removed
(or replaced with write_lock_irqsave/write_unlock_irqrestore pair).

---
Atsushi Nemoto