From: Greg KH <gregkh@suse.de>
To: linux-kernel@vger.kernel.org
Cc: mochel@digitalimplant.org
Subject: [PATCH] Use a klist for device child lists.
Date: Mon, 20 Jun 2005 15:59:26 -0700 [thread overview]
Message-ID: <11193083662698@kroah.com> (raw)
In-Reply-To: <11193083662460@kroah.com>
[PATCH] Use a klist for device child lists.
- Use klist iterator in device_for_each_child(), making it safe to use for
removing devices.
- Remove unused list_to_dev() function.
- Kills all usage of devices_subsys.rwsem.
Signed-off-by: Patrick Mochel <mochel@digitalimplant.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
commit 36239577cfb6b9a7c111209536b54200b0252ebf
tree f8fa5034fbb31d273d0889119cbc20e4c4b0c983
parent 9a881f166f473373589ce6f3fdc47b44a1450e2d
author mochel@digitalimplant.org <mochel@digitalimplant.org> Thu, 24 Mar 2005 19:08:30 -0800
committer Greg Kroah-Hartman <gregkh@suse.de> Mon, 20 Jun 2005 15:15:23 -0700
drivers/base/core.c | 30 +++++++++++++++---------------
include/linux/device.h | 10 ++--------
2 files changed, 17 insertions(+), 23 deletions(-)
diff --git a/drivers/base/core.c b/drivers/base/core.c
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -207,8 +207,7 @@ void device_initialize(struct device *de
{
kobj_set_kset_s(dev, devices_subsys);
kobject_init(&dev->kobj);
- INIT_LIST_HEAD(&dev->node);
- INIT_LIST_HEAD(&dev->children);
+ klist_init(&dev->klist_children);
INIT_LIST_HEAD(&dev->dma_pools);
init_MUTEX(&dev->sem);
}
@@ -249,10 +248,8 @@ int device_add(struct device *dev)
goto PMError;
if ((error = bus_add_device(dev)))
goto BusError;
- down_write(&devices_subsys.rwsem);
if (parent)
- list_add_tail(&dev->node, &parent->children);
- up_write(&devices_subsys.rwsem);
+ klist_add_tail(&parent->klist_children, &dev->knode_parent);
/* notify platform of device entry */
if (platform_notify)
@@ -335,10 +332,8 @@ void device_del(struct device * dev)
{
struct device * parent = dev->parent;
- down_write(&devices_subsys.rwsem);
if (parent)
- list_del_init(&dev->node);
- up_write(&devices_subsys.rwsem);
+ klist_remove(&dev->knode_parent);
/* Notify the platform of the removal, in case they
* need to do anything...
@@ -372,6 +367,12 @@ void device_unregister(struct device * d
}
+static struct device * next_device(struct klist_iter * i)
+{
+ struct klist_node * n = klist_next(i);
+ return n ? container_of(n, struct device, knode_parent) : NULL;
+}
+
/**
* device_for_each_child - device child iterator.
* @dev: parent struct device.
@@ -384,18 +385,17 @@ void device_unregister(struct device * d
* We check the return of @fn each time. If it returns anything
* other than 0, we break out and return that value.
*/
-int device_for_each_child(struct device * dev, void * data,
+int device_for_each_child(struct device * parent, void * data,
int (*fn)(struct device *, void *))
{
+ struct klist_iter i;
struct device * child;
int error = 0;
- down_read(&devices_subsys.rwsem);
- list_for_each_entry(child, &dev->children, node) {
- if((error = fn(child, data)))
- break;
- }
- up_read(&devices_subsys.rwsem);
+ klist_iter_init(&parent->klist_children, &i);
+ while ((child = next_device(&i)) && !error)
+ error = fn(child, data);
+ klist_iter_exit(&i);
return error;
}
diff --git a/include/linux/device.h b/include/linux/device.h
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -262,8 +262,8 @@ extern void class_device_destroy(struct
struct device {
- struct list_head node; /* node in sibling list */
- struct list_head children;
+ struct klist klist_children;
+ struct klist_node knode_parent; /* node in sibling list */
struct klist_node knode_driver;
struct klist_node knode_bus;
struct device * parent;
@@ -298,12 +298,6 @@ struct device {
void (*release)(struct device * dev);
};
-static inline struct device *
-list_to_dev(struct list_head *node)
-{
- return list_entry(node, struct device, node);
-}
-
static inline void *
dev_get_drvdata (struct device *dev)
{
next prev parent reply other threads:[~2005-06-21 2:30 UTC|newest]
Thread overview: 92+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-06-20 22:55 [GIT PATCH] Driver core changes for 2.6.12 Greg KH
2005-06-20 22:59 ` [PATCH] sysfs_{create|remove}_link should take const char * Greg KH
2005-06-20 22:59 ` [PATCH] kobject_hotplug() should use kobject_name() Greg KH
2005-06-20 22:59 ` [PATCH] Make kobject's name be const char * Greg KH
2005-06-20 22:59 ` [PATCH] kset_hotplug_ops->name shoudl return " Greg KH
2005-06-20 22:59 ` [PATCH] make driver's name be " Greg KH
2005-06-20 22:59 ` [PATCH] Make attributes names " Greg KH
2005-06-20 22:59 ` [PATCH] sysfs: (driver/base) if show/store is missing return -EIO Greg KH
2005-06-20 22:59 ` [PATCH] sysfs: " Greg KH
2005-06-20 22:59 ` [PATCH] sysfs: (driver/pci) " Greg KH
2005-06-20 22:59 ` [PATCH] sysfs: (driver/block) " Greg KH
2005-06-20 22:59 ` [PATCH] sysfs: (rest) " Greg KH
2005-06-20 22:59 ` [PATCH] INPUT: move to use the new class code, instead of class_simple Greg KH
2005-06-20 22:59 ` [PATCH] tty: " Greg KH
2005-06-20 22:59 ` [PATCH] CLASS: move a "simple" class logic into the class core Greg KH
2005-06-20 22:59 ` [PATCH] class: convert sound/* to use the new class api instead of class_simple Greg KH
2005-06-20 22:59 ` [PATCH] USB: move the usb hcd code to use the new class code Greg KH
2005-06-20 22:59 ` [PATCH] class: convert drivers/block/* to use the new class api instead of class_simple Greg KH
2005-06-20 22:59 ` [PATCH] class: convert drivers/ieee1394/* " Greg KH
2005-06-20 22:59 ` [PATCH] class: convert drivers/char/* " Greg KH
2005-06-20 22:59 ` [PATCH] class: convert drivers/scsi/* " Greg KH
2005-06-20 22:59 ` [PATCH] class: convert drivers/* " Greg KH
2005-06-20 22:59 ` [PATCH] USB: trivial error path fix Greg KH
2005-06-20 22:59 ` [PATCH] class: convert arch/* to use the new class api instead of class_simple Greg KH
2005-06-20 22:59 ` [PATCH] class: convert the remaining class_simple users in the kernel to usee the new class api Greg KH
2005-06-20 22:59 ` [PATCH] class: add kerneldoc for the new class functions Greg KH
2005-06-20 22:59 ` [PATCH] class: remove class_simple code, as no one in the tree is using it anymore Greg KH
2005-06-20 22:59 ` [PATCH] fix "make mandocs" after class_simple.c removal Greg KH
2005-06-20 22:59 ` [PATCH] Add a semaphore to struct device to synchronize calls to its driver Greg KH
2005-06-20 22:59 ` [PATCH] fix up ipmi code after class_simple.c removal Greg KH
2005-06-20 22:59 ` [PATCH] Move device/driver code to drivers/base/dd.c Greg KH
2005-06-20 22:59 ` [PATCH] Use driver_for_each_device() instead of manually walking list Greg KH
2005-06-20 22:59 ` [PATCH] Use driver_for_each_device() in drivers/pnp/driver.c " Greg KH
2005-06-20 22:59 ` [PATCH] Add driver_for_each_device() Greg KH
2005-06-20 22:59 ` [PATCH] Add a klist to struct bus_type for its drivers Greg KH
2005-06-20 22:59 ` [PATCH] Add a klist to struct bus_type for its devices Greg KH
2005-06-20 22:59 ` [PATCH] Add initial implementation of klist helpers Greg KH
2005-06-20 22:59 ` [PATCH] Add a klist to struct device_driver for the devices bound to it Greg KH
2005-06-20 22:59 ` [PATCH] Remove the unused device_find() Greg KH
2005-06-20 22:59 ` [PATCH] Use bus_for_each_{dev,drv} for driver binding Greg KH
2005-06-20 22:59 ` [PATCH] add klist_node_attached() to determine if a node is on a list or not Greg KH
2005-06-20 22:59 ` [PATCH] Fix up USB to use klist_node_attached() instead of list_empty() on lists that will go away Greg KH
2005-06-20 22:59 ` [PATCH] Remove struct device::driver_list Greg KH
2005-06-20 22:59 ` [PATCH] Fix up bus code and remove use of rwsem Greg KH
2005-06-20 22:59 ` [PATCH] Remove struct device::bus_list Greg KH
2005-06-20 22:59 ` [PATCH] Don't reference NULL klist pointer in klist_remove() Greg KH
2005-06-20 22:59 ` [PATCH] Call klist_del() instead of klist_remove() Greg KH
2005-06-20 22:59 ` [PATCH] Use device_for_each_child() to unregister devices in scsi_remove_target() Greg KH
2005-06-20 22:59 ` [PATCH] use device_for_each_child() to properly access child devices Greg KH
2005-06-20 22:59 ` Greg KH [this message]
2005-06-20 22:59 ` [PATCH] Fix up bogus comment Greg KH
2005-06-20 22:59 ` [PATCH] driver core: change export symbol for driver_for_each_device() Greg KH
2005-06-20 22:59 ` [PATCH] Use device_for_each_child() to unregister devices in nodemgr_remove_host_dev() Greg KH
2005-06-20 22:59 ` [PATCH] use device_for_each_child() to properly access child devices Greg KH
2005-06-20 22:59 ` [PATCH] USB: fix build warning in usb core as pointed out by Andrew Greg KH
2005-06-20 22:59 ` [PATCH] Driver Core: fix bk-driver-core kills ppc64 Greg KH
2005-06-20 22:59 ` [PATCH] Fix typo in scdrv_init() Greg KH
2005-06-20 22:59 ` [PATCH] Driver core: Fix up the driver and device iterators to be quieter Greg KH
2005-06-20 22:59 ` [PATCH] usb: klist_node_attached() fix Greg KH
2005-06-20 22:59 ` [PATCH] sn: fixes due to driver core changes Greg KH
2005-06-20 22:59 ` [PATCH] driver core: Fix races in driver_detach() Greg KH
2005-06-20 22:59 ` [PATCH] Driver Core: driver model doc update Greg KH
2005-06-20 22:59 ` [PATCH] Driver core: unregister_node() for hotplug use Greg KH
2005-06-20 22:59 ` [PATCH] usbcore: Don't call device_release_driver recursively Greg KH
2005-06-20 22:59 ` [PATCH] libfs: add simple attribute files Greg KH
2005-06-20 22:59 ` [PATCH] Driver core: change device_attribute callbacks Greg KH
2005-06-20 22:59 ` [PATCH] driver core: fix error handling in bus_add_device Greg KH
2005-06-20 22:59 ` [PATCH] Driver core: Documentation: update device attribute callbacks Greg KH
2005-06-20 22:59 ` [PATCH] Driver Core: drivers/base - drivers/i2c/chips/adm1026.c: " Greg KH
2005-06-20 22:59 ` [PATCH] Driver Core: arch: " Greg KH
2005-06-20 22:59 ` [PATCH] Driver Core: drivers/i2c/chips/adm1031.c - lm75.c: " Greg KH
2005-06-20 22:59 ` [PATCH] Driver Core: drivers/i2c/chips/lm77.c - max1619.c: " Greg KH
2005-06-20 22:59 ` [PATCH] Driver Core: drivers/i2c/chips/pc87360.c - w83627hf.c: " Greg KH
2005-06-20 22:59 ` [PATCH] Driver Core: drivers/char/raw3270.c - drivers/net/netiucv.c: " Greg KH
2005-06-20 22:59 ` [PATCH] Driver Core: drivers/i2c/chips/w83781d.c - drivers/s390/block/dcssblk.c: " Greg KH
2005-06-20 22:59 ` [PATCH] Driver Core: drivers/usb/input/aiptek.c - drivers/zorro/zorro-sysfs.c: " Greg KH
2005-06-20 22:59 ` [PATCH] Driver Core: drivers/s390/net/qeth_sys.c - drivers/usb/gadget/pxa2xx_udc.c: " Greg KH
2005-06-20 22:59 ` [PATCH] Driver Core: include: " Greg KH
2005-06-20 22:59 ` [PATCH] I2C: drivers/i2c/chips/adm1026.c: use dynamic sysfs callbacks Greg KH
2005-06-20 22:59 ` [PATCH] I2C: add i2c sensor_device_attribute and macros Greg KH
2005-06-20 22:59 ` [PATCH] sysfs-iattr: attach sysfs_dirent before new inode Greg KH
2005-06-20 22:59 ` [PATCH] Driver core: Don't "lose" devices on suspend on failure Greg KH
2005-06-20 22:59 ` [PATCH] sysfs-iattr: set inode attributes Greg KH
2005-06-20 22:59 ` [PATCH] sysfs-iattr: add sysfs_setattr Greg KH
2005-06-20 22:59 ` [PATCH] SYSFS: fix PAGE_SIZE check Greg KH
2005-06-20 22:59 ` [PATCH] USB: fix show_modalias() function due to attribute change Greg KH
2005-06-20 22:59 ` [PATCH] PCI: " Greg KH
2005-07-06 0:38 ` [PATCH] Use device_for_each_child() to unregister devices in scsi_remove_target() Patrick Mansfield
2005-07-12 0:20 ` Greg KH
2005-07-12 0:56 ` Patrick Mansfield
2005-06-21 11:42 ` [PATCH] Add initial implementation of klist helpers Rik van Riel
2005-06-21 23:13 ` Greg KH
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