Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262202AbTIRXb7 (ORCPT ); Thu, 18 Sep 2003 19:31:59 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262204AbTIRXb7 (ORCPT ); Thu, 18 Sep 2003 19:31:59 -0400 Received: from fw.osdl.org ([65.172.181.6]:62933 "EHLO mail.osdl.org") by vger.kernel.org with ESMTP id S262202AbTIRXb5 (ORCPT ); Thu, 18 Sep 2003 19:31:57 -0400 Date: Thu, 18 Sep 2003 16:31:56 -0700 From: Chris Wright To: linux-kernel@vger.kernel.org Cc: torvalds@osdl.org Subject: [PATCH 4/13] use cpu_relax() in busy loop Message-ID: <20030918163156.H16499@osdlab.pdx.osdl.net> References: <20030918162522.E16499@osdlab.pdx.osdl.net> <20030918162748.F16499@osdlab.pdx.osdl.net> <20030918162930.G16499@osdlab.pdx.osdl.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: <20030918162930.G16499@osdlab.pdx.osdl.net>; from chrisw@osdl.org on Thu, Sep 18, 2003 at 04:29:30PM -0700 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 755 Lines: 21 Replace busy loop nop with cpu_relax(). ===== drivers/cdrom/sonycd535.c 1.39 vs edited ===== --- 1.39/drivers/cdrom/sonycd535.c Tue Sep 9 07:41:30 2003 +++ edited/drivers/cdrom/sonycd535.c Thu Sep 18 10:52:41 2003 @@ -1526,7 +1526,8 @@ enable_interrupts(); outb(0, read_status_reg); /* does a reset? */ delay = jiffies + HZ/10; - while (time_before(jiffies, delay)) ; + while (time_before(jiffies, delay)) + cpu_relax(); sony535_irq_used = probe_irq_off(irq_mask); disable_interrupts(); - 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/