Re: [PATCH 1/10] safe_apic_wait_icr_idle - i386

[Fernando Luis Vázquez Cao <fernando@oss.ntt.co.jp>]

On Wed, 2007-04-25 at 22:55 +1000, Keith Owens wrote:
> Fernando Luis =?ISO-8859-1?Q?V=E1zquez?= Cao (on Wed, 25 Apr 2007 20:13:28 +0900) wrote:
> >+static __inline__ unsigned long safe_apic_wait_icr_idle(void)
> >+{
> >+	unsigned long send_status;
> >+	int timeout;
> >+
> >+	timeout = 0;
> >+	do {
> >+		udelay(100);
> >+		send_status = apic_read(APIC_ICR) & APIC_ICR_BUSY;
> >+	} while (send_status && (timeout++ < 1000));
> >+
> >+	return send_status;
> >+}
> >+
> 
> safe_apic_wait_icr_idle() as coded guarantees a minimum 100 usec delay
> before sending the IPI, this extra delay is unnecessary.  Change it to
Hi Keith,

Thank you for the feedback!

> 	do {
> 		send_status = apic_read(APIC_ICR) & APIC_ICR_BUSY;
> 		if (send_status)
> 			break;
> 		udelay(100);
> 	} while (timeout++ < 1000);
Oops, that is a good point. I will resend this patch either tonight or
tomorrow morning.

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/