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driver core: remove CONFIG_SYSFS_DEPRECATED_V2 but keep it for block devices

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This patch removes the old CONFIG_SYSFS_DEPRECATED_V2 config option,
but it keeps the logic around to handle block devices in the old manner
as some people like to run new kernel versions on old (pre 2007/2008)
distros.

Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Stephen Hemminger <shemminger@vyatta.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: "James E.J. Bottomley" <James.Bottomley@suse.de>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
Cc: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jaroslav Kysela <perex@perex.cz>
Cc: Takashi Iwai <tiwai@suse.de>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: David Howells <dhowells@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Kay Sievers 2010-09-04 22:33:14 -07:00 committed by Greg Kroah-Hartman
parent 807508c8ff
commit 39aba963d9
8 changed files with 44 additions and 260 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
drivers/base/bus.c
View File

@ -440,22 +440,6 @@ static void device_remove_attrs(struct bus_type *bus, struct device *dev)
}
}
#ifdef CONFIG_SYSFS_DEPRECATED
static int make_deprecated_bus_links(struct device *dev)
{
return sysfs_create_link(&dev->kobj,
&dev->bus->p->subsys.kobj, "bus");
}
static void remove_deprecated_bus_links(struct device *dev)
{
sysfs_remove_link(&dev->kobj, "bus");
}
#else
static inline int make_deprecated_bus_links(struct device *dev) { return 0; }
static inline void remove_deprecated_bus_links(struct device *dev) { }
#endif
/**
* bus_add_device - add device to bus
* @dev: device being added
@ -482,15 +466,10 @@ int bus_add_device(struct device *dev)
&dev->bus->p->subsys.kobj, "subsystem");
if (error)
goto out_subsys;
error = make_deprecated_bus_links(dev);
if (error)
goto out_deprecated;
klist_add_tail(&dev->p->knode_bus, &bus->p->klist_devices);
}
return 0;
out_deprecated:
sysfs_remove_link(&dev->kobj, "subsystem");
out_subsys:
sysfs_remove_link(&bus->p->devices_kset->kobj, dev_name(dev));
out_id:
@ -530,7 +509,6 @@ void bus_remove_device(struct device *dev)
{
if (dev->bus) {
sysfs_remove_link(&dev->kobj, "subsystem");
remove_deprecated_bus_links(dev);
sysfs_remove_link(&dev->bus->p->devices_kset->kobj,
dev_name(dev));
device_remove_attrs(dev->bus, dev);

19
drivers/base/class.c
View File

@ -276,25 +276,6 @@ void class_destroy(struct class *cls)
class_unregister(cls);
}
#ifdef CONFIG_SYSFS_DEPRECATED
char *make_class_name(const char *name, struct kobject *kobj)
{
char *class_name;
int size;
size = strlen(name) + strlen(kobject_name(kobj)) + 2;
class_name = kmalloc(size, GFP_KERNEL);
if (!class_name)
return NULL;
strcpy(class_name, name);
strcat(class_name, ":");
strcat(class_name, kobject_name(kobj));
return class_name;
}
#endif
/**
* class_dev_iter_init - initialize class device iterator
* @iter: class iterator to initialize

204
drivers/base/core.c
View File

@ -203,37 +203,6 @@ static int dev_uevent(struct kset *kset, struct kobject *kobj,
if (dev->driver)
add_uevent_var(env, "DRIVER=%s", dev->driver->name);
#ifdef CONFIG_SYSFS_DEPRECATED
if (dev->class) {
struct device *parent = dev->parent;
/* find first bus device in parent chain */
while (parent && !parent->bus)
parent = parent->parent;
if (parent && parent->bus) {
const char *path;
path = kobject_get_path(&parent->kobj, GFP_KERNEL);
if (path) {
add_uevent_var(env, "PHYSDEVPATH=%s", path);
kfree(path);
}
add_uevent_var(env, "PHYSDEVBUS=%s", parent->bus->name);
if (parent->driver)
add_uevent_var(env, "PHYSDEVDRIVER=%s",
parent->driver->name);
}
} else if (dev->bus) {
add_uevent_var(env, "PHYSDEVBUS=%s", dev->bus->name);
if (dev->driver)
add_uevent_var(env, "PHYSDEVDRIVER=%s",
dev->driver->name);
}
#endif
/* have the bus specific function add its stuff */
if (dev->bus && dev->bus->uevent) {
retval = dev->bus->uevent(dev, env);
@ -578,24 +547,6 @@ void device_initialize(struct device *dev)
set_dev_node(dev, -1);
}
#ifdef CONFIG_SYSFS_DEPRECATED
static struct kobject *get_device_parent(struct device *dev,
struct device *parent)
{
/* class devices without a parent live in /sys/class/<classname>/ */
if (dev->class && (!parent || parent->class != dev->class))
return &dev->class->p->class_subsys.kobj;
/* all other devices keep their parent */
else if (parent)
return &parent->kobj;
return NULL;
}
static inline void cleanup_device_parent(struct device *dev) {}
static inline void cleanup_glue_dir(struct device *dev,
struct kobject *glue_dir) {}
#else
static struct kobject *virtual_device_parent(struct device *dev)
{
static struct kobject *virtual_dir = NULL;
@ -666,6 +617,14 @@ static struct kobject *get_device_parent(struct device *dev,
struct kobject *parent_kobj;
struct kobject *k;
#ifdef CONFIG_SYSFS_DEPRECATED
/* block disks show up in /sys/block */
if (dev->class == &block_class) {
if (parent && parent->class == &block_class)
return &parent->kobj;
return &block_class.p->class_subsys.kobj;
}
#endif
/*
* If we have no parent, we live in "virtual".
* Class-devices with a non class-device as parent, live
@ -719,7 +678,6 @@ static void cleanup_device_parent(struct device *dev)
{
cleanup_glue_dir(dev, dev->kobj.parent);
}
#endif
static void setup_parent(struct device *dev, struct device *parent)
{
@ -742,70 +700,29 @@ static int device_add_class_symlinks(struct device *dev)
if (error)
goto out;
#ifdef CONFIG_SYSFS_DEPRECATED
/* stacked class devices need a symlink in the class directory */
if (dev->kobj.parent != &dev->class->p->class_subsys.kobj &&
device_is_not_partition(dev)) {
error = sysfs_create_link(&dev->class->p->class_subsys.kobj,
&dev->kobj, dev_name(dev));
if (error)
goto out_subsys;
}
if (dev->parent && device_is_not_partition(dev)) {
struct device *parent = dev->parent;
char *class_name;
/*
* stacked class devices have the 'device' link
* pointing to the bus device instead of the parent
*/
while (parent->class && !parent->bus && parent->parent)
parent = parent->parent;
error = sysfs_create_link(&dev->kobj,
&parent->kobj,
"device");
if (error)
goto out_busid;
class_name = make_class_name(dev->class->name,
&dev->kobj);
if (class_name)
error = sysfs_create_link(&dev->parent->kobj,
&dev->kobj, class_name);
kfree(class_name);
if (error)
goto out_device;
}
return 0;
out_device:
if (dev->parent && device_is_not_partition(dev))
sysfs_remove_link(&dev->kobj, "device");
out_busid:
if (dev->kobj.parent != &dev->class->p->class_subsys.kobj &&
device_is_not_partition(dev))
sysfs_delete_link(&dev->class->p->class_subsys.kobj, &dev->kobj,
dev_name(dev));
#else
/* link in the class directory pointing to the device */
error = sysfs_create_link(&dev->class->p->class_subsys.kobj,
&dev->kobj, dev_name(dev));
if (error)
goto out_subsys;
if (dev->parent && device_is_not_partition(dev)) {
error = sysfs_create_link(&dev->kobj, &dev->parent->kobj,
"device");
if (error)
goto out_busid;
goto out_subsys;
}
#ifdef CONFIG_SYSFS_DEPRECATED
/* /sys/block has directories and does not need symlinks */
if (dev->class == &block_class)
return 0;
#endif
/* link in the class directory pointing to the device */
error = sysfs_create_link(&dev->class->p->class_subsys.kobj,
&dev->kobj, dev_name(dev));
if (error)
goto out_device;
return 0;
out_busid:
sysfs_delete_link(&dev->class->p->class_subsys.kobj, &dev->kobj, dev_name(dev));
#endif
out_device:
sysfs_remove_link(&dev->kobj, "device");
out_subsys:
sysfs_remove_link(&dev->kobj, "subsystem");
@ -818,30 +735,14 @@ static void device_remove_class_symlinks(struct device *dev)
if (!dev->class)
return;
#ifdef CONFIG_SYSFS_DEPRECATED
if (dev->parent && device_is_not_partition(dev)) {
char *class_name;
class_name = make_class_name(dev->class->name, &dev->kobj);
if (class_name) {
sysfs_remove_link(&dev->parent->kobj, class_name);
kfree(class_name);
}
sysfs_remove_link(&dev->kobj, "device");
}
if (dev->kobj.parent != &dev->class->p->class_subsys.kobj &&
device_is_not_partition(dev))
sysfs_delete_link(&dev->class->p->class_subsys.kobj, &dev->kobj,
dev_name(dev));
#else
if (dev->parent && device_is_not_partition(dev))
sysfs_remove_link(&dev->kobj, "device");
sysfs_delete_link(&dev->class->p->class_subsys.kobj, &dev->kobj, dev_name(dev));
#endif
sysfs_remove_link(&dev->kobj, "subsystem");
#ifdef CONFIG_SYSFS_DEPRECATED
if (dev->class == &block_class)
return;
#endif
sysfs_delete_link(&dev->class->p->class_subsys.kobj, &dev->kobj, dev_name(dev));
}
/**
@ -1613,41 +1514,23 @@ int device_rename(struct device *dev, const char *new_name)
pr_debug("device: '%s': %s: renaming to '%s'\n", dev_name(dev),
__func__, new_name);
#ifdef CONFIG_SYSFS_DEPRECATED
if ((dev->class) && (dev->parent))
old_class_name = make_class_name(dev->class->name, &dev->kobj);
#endif
old_device_name = kstrdup(dev_name(dev), GFP_KERNEL);
if (!old_device_name) {
error = -ENOMEM;
goto out;
}
#ifndef CONFIG_SYSFS_DEPRECATED
if (dev->class) {
error = sysfs_rename_link(&dev->class->p->class_subsys.kobj,
&dev->kobj, old_device_name, new_name);
if (error)
goto out;
}
#endif
error = kobject_rename(&dev->kobj, new_name);
if (error)
goto out;
#ifdef CONFIG_SYSFS_DEPRECATED
if (old_class_name) {
new_class_name = make_class_name(dev->class->name, &dev->kobj);
if (new_class_name) {
error = sysfs_rename_link(&dev->parent->kobj,
&dev->kobj,
old_class_name,
new_class_name);
}
}
#endif
out:
put_device(dev);
@ -1664,40 +1547,13 @@ static int device_move_class_links(struct device *dev,
struct device *new_parent)
{
int error = 0;
#ifdef CONFIG_SYSFS_DEPRECATED
char *class_name;
class_name = make_class_name(dev->class->name, &dev->kobj);
if (!class_name) {
error = -ENOMEM;
goto out;
}
if (old_parent) {
sysfs_remove_link(&dev->kobj, "device");
sysfs_remove_link(&old_parent->kobj, class_name);
}
if (new_parent) {
error = sysfs_create_link(&dev->kobj, &new_parent->kobj,
"device");
if (error)
goto out;
error = sysfs_create_link(&new_parent->kobj, &dev->kobj,
class_name);
if (error)
sysfs_remove_link(&dev->kobj, "device");
} else
error = 0;
out:
kfree(class_name);
return error;
#else
if (old_parent)
sysfs_remove_link(&dev->kobj, "device");
if (new_parent)
error = sysfs_create_link(&dev->kobj, &new_parent->kobj,
"device");
return error;
#endif
}
/**

2
drivers/scsi/hosts.c
View File

@ -411,9 +411,7 @@ struct Scsi_Host *scsi_host_alloc(struct scsi_host_template *sht, int privsize)
device_initialize(&shost->shost_gendev);
dev_set_name(&shost->shost_gendev, "host%d", shost->host_no);
#ifndef CONFIG_SYSFS_DEPRECATED
shost->shost_gendev.bus = &scsi_bus_type;
#endif
shost->shost_gendev.type = &scsi_host_type;
device_initialize(&shost->shost_dev);

2
drivers/scsi/scsi_scan.c
View File

@ -417,9 +417,7 @@ static struct scsi_target *scsi_alloc_target(struct device *parent,
starget->reap_ref = 1;
dev->parent = get_device(parent);
dev_set_name(dev, "target%d:%d:%d", shost->host_no, channel, id);
#ifndef CONFIG_SYSFS_DEPRECATED
dev->bus = &scsi_bus_type;
#endif
dev->type = &scsi_target_type;
starget->id = id;
starget->channel = channel;

6
include/sound/core.h
View File

@ -133,9 +133,7 @@ struct snd_card {
int free_on_last_close; /* free in context of file_release */
wait_queue_head_t shutdown_sleep;
struct device *dev; /* device assigned to this card */
#ifndef CONFIG_SYSFS_DEPRECATED
struct device *card_dev; /* cardX object for sysfs */
#endif
#ifdef CONFIG_PM
unsigned int power_state; /* power state */
@ -196,11 +194,7 @@ struct snd_minor {
/* return a device pointer linked to each sound device as a parent */
static inline struct device *snd_card_get_device_link(struct snd_card *card)
{
#ifdef CONFIG_SYSFS_DEPRECATED
return card ? card->dev : NULL;
#else
return card ? card->card_dev : NULL;
#endif
}
/* sound.c */

38
init/Kconfig
View File

@ -656,40 +656,24 @@ config MM_OWNER
bool
config SYSFS_DEPRECATED
bool
config SYSFS_DEPRECATED_V2
bool "enable deprecated sysfs features to support old userspace tools"
depends on SYSFS
default n
select SYSFS_DEPRECATED
help
This option switches the layout of sysfs to the deprecated
version. Do not use it on recent distributions.
This option switches the layout of the "block" class devices, to not
show up in /sys/class/block/, but only in /sys/block/.
The current sysfs layout features a unified device tree at
/sys/devices/, which is able to express a hierarchy between
class devices. If the deprecated option is set to Y, the
unified device tree is split into a bus device tree at
/sys/devices/ and several individual class device trees at
/sys/class/. The class and bus devices will be connected by
"<subsystem>:<name>" and the "device" links. The "block"
class devices, will not show up in /sys/class/block/. Some
subsystems will suppress the creation of some devices which
depend on the unified device tree.
This option allows new kernels to run on old distributions and tools,
which might get confused by /sys/class/block/. Since 2007/2008 all
major distributions and tools handle this just fine.
This option is not a pure compatibility option that can
be safely enabled on newer distributions. It will change the
layout of sysfs to the non-extensible deprecated version,
and disable some features, which can not be exported without
confusing older userspace tools. Since 2007/2008 all major
distributions do not enable this option, and ship no tools which
depend on the deprecated layout or this option.
Recent distributions and userspace tools after 2009/2010 depend on
the existence of /sys/class/block/, and will not work with this
option enabled.
If you are using a new kernel on an older distribution, or use
older userspace tools, you might need to say Y here. Do not say Y,
if the original kernel, that came with your distribution, has
this option set to N.
Only if you are using a new kernel on an old distribution, you might
need to say Y here. Never say Y, if the original kernel, that came
with your distribution, has not set this option.
config RELAY
bool "Kernel->user space relay support (formerly relayfs)"

11
sound/core/init.c
View File

@ -395,12 +395,10 @@ int snd_card_disconnect(struct snd_card *card)
snd_printk(KERN_ERR "not all devices for card %i can be disconnected\n", card->number);
snd_info_card_disconnect(card);
#ifndef CONFIG_SYSFS_DEPRECATED
if (card->card_dev) {
device_unregister(card->card_dev);
card->card_dev = NULL;
}
#endif
#ifdef CONFIG_PM
wake_up(&card->power_sleep);
#endif
@ -573,7 +571,6 @@ void snd_card_set_id(struct snd_card *card, const char *nid)
}
EXPORT_SYMBOL(snd_card_set_id);
#ifndef CONFIG_SYSFS_DEPRECATED
static ssize_t
card_id_show_attr(struct device *dev,
struct device_attribute *attr, char *buf)
@ -630,7 +627,6 @@ card_number_show_attr(struct device *dev,
static struct device_attribute card_number_attrs =
__ATTR(number, S_IRUGO, card_number_show_attr, NULL);
#endif /* CONFIG_SYSFS_DEPRECATED */
/**
* snd_card_register - register the soundcard
@ -649,7 +645,7 @@ int snd_card_register(struct snd_card *card)
if (snd_BUG_ON(!card))
return -EINVAL;
#ifndef CONFIG_SYSFS_DEPRECATED
if (!card->card_dev) {
card->card_dev = device_create(sound_class, card->dev,
MKDEV(0, 0), card,
@ -657,7 +653,7 @@ int snd_card_register(struct snd_card *card)
if (IS_ERR(card->card_dev))
card->card_dev = NULL;
}
#endif
if ((err = snd_device_register_all(card)) < 0)
return err;
mutex_lock(&snd_card_mutex);
@ -674,7 +670,6 @@ int snd_card_register(struct snd_card *card)
if (snd_mixer_oss_notify_callback)
snd_mixer_oss_notify_callback(card, SND_MIXER_OSS_NOTIFY_REGISTER);
#endif
#ifndef CONFIG_SYSFS_DEPRECATED
if (card->card_dev) {
err = device_create_file(card->card_dev, &card_id_attrs);
if (err < 0)
@ -683,7 +678,7 @@ int snd_card_register(struct snd_card *card)
if (err < 0)
return err;
}
#endif
return 0;
}