From: "Xiaogeng (Shawn) Jin" <xjin@redswitch•com>
To: linuxppc-embedded@lists•linuxppc.org
Subject: usage of disarm_decr[]
Date: Wed, 11 Dec 2002 13:13:05 -0800 [thread overview]
Message-ID: <3DF7AA61.9020205@redswitch.com> (raw)
disarm_decr[] is defined as an unsigned long array but never get
initialized in arch/ppc/kernel/time.c.
What's the purpose of using disarm_decr? I read the timer_interrupt()
code and found the only place where it's referenced.
int timer_interrupt(struct pt_regs * regs)
{
...
if ( !disarm_decr[smp_processor_id()] )
set_dec(next_dec);
last_jiffy_stamp(cpu) = jiffy_stamp;
...
}
So in this case, the value of disarm_decr[] is always zero, right? Then
the decrementer get set each time when the timer interrupt is invoked.
--
Shawn Jin
RedSwitch Inc.
** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
next reply other threads:[~2002-12-11 21:13 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-12-11 21:13 Xiaogeng (Shawn) Jin [this message]
2002-12-11 21:29 ` usage of disarm_decr[] Paul Mackerras
2002-12-11 22:31 ` Xiaogeng (Shawn) Jin
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