Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759691AbYAQVsh (ORCPT ); Thu, 17 Jan 2008 16:48:37 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1758538AbYAQVmR (ORCPT ); Thu, 17 Jan 2008 16:42:17 -0500 Received: from saraswathi.solana.com ([198.99.130.12]:44825 "EHLO saraswathi.solana.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758531AbYAQVmQ (ORCPT ); Thu, 17 Jan 2008 16:42:16 -0500 Date: Thu, 17 Jan 2008 16:40:50 -0500 From: Jeff Dike To: Andrew Morton Cc: Daniel Walker , uml-devel , LKML Subject: [PATCH 19/20] UML - port mutex conversion Message-ID: <20080117214050.GA6782@c2.user-mode-linux.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.4.2.3i Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1773 Lines: 56 From: Daniel Walker The port_sem is already used as a mutex since it's using DECLARE_MUTEX(), but the underlying construct is still a semaphore .. This patch switches it over to a struct mutex. Signed-off-by: Daniel Walker Signed-off-by: Jeff Dike --- arch/um/drivers/port_kern.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) Index: linux-2.6.22/arch/um/drivers/port_kern.c =================================================================== --- linux-2.6.22.orig/arch/um/drivers/port_kern.c 2008-01-17 13:44:46.000000000 -0500 +++ linux-2.6.22/arch/um/drivers/port_kern.c 2008-01-17 13:47:39.000000000 -0500 @@ -6,6 +6,7 @@ #include "linux/completion.h" #include "linux/interrupt.h" #include "linux/list.h" +#include "linux/mutex.h" #include "asm/atomic.h" #include "init.h" #include "irq_kern.h" @@ -120,7 +121,7 @@ static int port_accept(struct port_list return 0; } -static DECLARE_MUTEX(ports_sem); +static DEFINE_MUTEX(ports_mutex); static LIST_HEAD(ports); static void port_work_proc(struct work_struct *unused) @@ -161,7 +162,7 @@ void *port_data(int port_num) struct port_dev *dev = NULL; int fd; - down(&ports_sem); + mutex_lock(&ports_mutex); list_for_each(ele, &ports) { port = list_entry(ele, struct port_list, list); if (port->port == port_num) @@ -216,7 +217,7 @@ void *port_data(int port_num) out_free: kfree(port); out: - up(&ports_sem); + mutex_unlock(&ports_mutex); return dev; } -- 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/