From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753009Ab1GVQld (ORCPT ); Fri, 22 Jul 2011 12:41:33 -0400 Received: from ppsw-51.csi.cam.ac.uk ([131.111.8.151]:49934 "EHLO ppsw-51.csi.cam.ac.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752633Ab1GVQla (ORCPT ); Fri, 22 Jul 2011 12:41:30 -0400 X-Cam-AntiVirus: no malware found X-Cam-SpamDetails: not scanned X-Cam-ScannerInfo: http://www.cam.ac.uk/cs/email/scanner/ From: Jonathan Cameron To: linux-kernel@vger.kernel.org Cc: lm-sensors@lm-sensors.org, rtc-linux@googlegroups.com, osd-dev@open-osd.org, linux-scsi@vger.kernel.org, dri-devel@lists.freedesktop.org, jkosina@suse.cz, naota@elisp.net, rusty@rustcorp.com.au, paulmck@linux.vnet.ibm.com, namhyung@gmail.com, randy.dunlap@oracle.com, tj@kernel.org, cabarnes@indesign-llc.com, akpm@linux-foundation.org, airlied@redhat.com, thellstrom@vmware.com, johnpol@2ka.mipt.ru, JBottomley@parallels.com, bhalevy@panasas.com, bharrosh@panasas.com, a.zummo@towertech.it, guenter.roeck@ericsson.com, khali@linux-fr.org, airlied@linux.ie, Jonathan Cameron Subject: [PATCH 2/8] hwmon: convert idr to ida and use ida_simple interface. Date: Fri, 22 Jul 2011 17:41:11 +0100 Message-Id: <1311352886-4047-3-git-send-email-jic23@cam.ac.uk> X-Mailer: git-send-email 1.7.3.4 In-Reply-To: <1311352886-4047-1-git-send-email-jic23@cam.ac.uk> References: <1311352886-4047-1-git-send-email-jic23@cam.ac.uk> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org hwmon was using an idr with a NULL pointer, so convert to an ida which then allows use of Rusty's ida_simple_get. Signed-off-by: Jonathan Cameron --- drivers/hwmon/hwmon.c | 32 ++++++++------------------------ 1 files changed, 8 insertions(+), 24 deletions(-) diff --git a/drivers/hwmon/hwmon.c b/drivers/hwmon/hwmon.c index a61e781..6460487 100644 --- a/drivers/hwmon/hwmon.c +++ b/drivers/hwmon/hwmon.c @@ -27,8 +27,7 @@ static struct class *hwmon_class; -static DEFINE_IDR(hwmon_idr); -static DEFINE_SPINLOCK(idr_lock); +static DEFINE_IDA(hwmon_ida); /** * hwmon_device_register - register w/ hwmon @@ -42,30 +41,17 @@ static DEFINE_SPINLOCK(idr_lock); struct device *hwmon_device_register(struct device *dev) { struct device *hwdev; - int id, err; - -again: - if (unlikely(idr_pre_get(&hwmon_idr, GFP_KERNEL) == 0)) - return ERR_PTR(-ENOMEM); - - spin_lock(&idr_lock); - err = idr_get_new(&hwmon_idr, NULL, &id); - spin_unlock(&idr_lock); + int id; - if (unlikely(err == -EAGAIN)) - goto again; - else if (unlikely(err)) - return ERR_PTR(err); + id = ida_simple_get(&hwmon_ida, 0, 0, GFP_KERNEL); + if (id < 0) + return ERR_PTR(id); - id = id & MAX_ID_MASK; hwdev = device_create(hwmon_class, dev, MKDEV(0, 0), NULL, HWMON_ID_FORMAT, id); - if (IS_ERR(hwdev)) { - spin_lock(&idr_lock); - idr_remove(&hwmon_idr, id); - spin_unlock(&idr_lock); - } + if (IS_ERR(hwdev)) + ida_simple_remove(&hwmon_ida, id); return hwdev; } @@ -81,9 +67,7 @@ void hwmon_device_unregister(struct device *dev) if (likely(sscanf(dev_name(dev), HWMON_ID_FORMAT, &id) == 1)) { device_unregister(dev); - spin_lock(&idr_lock); - idr_remove(&hwmon_idr, id); - spin_unlock(&idr_lock); + ida_simple_remove(&hwmon_ida, id); } else dev_dbg(dev->parent, "hwmon_device_unregister() failed: bad class ID!\n"); -- 1.7.3.4