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sysfs: kill sysfs_update_file() 

sysfs_update_file() depends on inode->i_mtime but sysfs iondes are now
reclaimable making the reported modification time unreliable.  There's
only one user (pci hotplug) of this notification mechanism and it
reportedly isn't utilized from userland.

Kill sysfs_update_file().

Signed-off-by: Tejun Heo <htejun@gmail.com>
Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Tejun Heo 2007-09-20 16:05:10 +09:00 committed by Greg Kroah-Hartman
parent 59f6901568
commit 5a7ad7f044
3 changed files with 0 additions and 107 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

60
drivers/pci/hotplug/pci_hotplug_core.c
View File

@ -694,66 +694,6 @@ int __must_check pci_hp_change_slot_info(struct hotplug_slot *slot,
if ((slot == NULL) || (info == NULL))
return -ENODEV;
/*
* check all fields in the info structure, and update timestamps
* for the files referring to the fields that have now changed.
*/
if ((has_power_file(slot) == 0) &&
(slot->info->power_status != info->power_status)) {
retval = sysfs_update_file(&slot->kobj,
&hotplug_slot_attr_power.attr);
if (retval)
return retval;
}
if ((has_attention_file(slot) == 0) &&
(slot->info->attention_status != info->attention_status)) {
retval = sysfs_update_file(&slot->kobj,
&hotplug_slot_attr_attention.attr);
if (retval)
return retval;
}
if ((has_latch_file(slot) == 0) &&
(slot->info->latch_status != info->latch_status)) {
retval = sysfs_update_file(&slot->kobj,
&hotplug_slot_attr_latch.attr);
if (retval)
return retval;
}
if ((has_adapter_file(slot) == 0) &&
(slot->info->adapter_status != info->adapter_status)) {
retval = sysfs_update_file(&slot->kobj,
&hotplug_slot_attr_presence.attr);
if (retval)
return retval;
}
if ((has_address_file(slot) == 0) &&
(slot->info->address != info->address)) {
retval = sysfs_update_file(&slot->kobj,
&hotplug_slot_attr_address.attr);
if (retval)
return retval;
}
if ((has_max_bus_speed_file(slot) == 0) &&
(slot->info->max_bus_speed != info->max_bus_speed)) {
retval = sysfs_update_file(&slot->kobj,
&hotplug_slot_attr_max_bus_speed.attr);
if (retval)
return retval;
}
if ((has_cur_bus_speed_file(slot) == 0) &&
(slot->info->cur_bus_speed != info->cur_bus_speed)) {
retval = sysfs_update_file(&slot->kobj,
&hotplug_slot_attr_cur_bus_speed.attr);
if (retval)
return retval;
}
memcpy (slot->info, info, sizeof (struct hotplug_slot_info));
return 0;

40
fs/sysfs/file.c
View File

@ -3,7 +3,6 @@
*/
#include <linux/module.h>
#include <linux/fsnotify.h>
#include <linux/kobject.h>
#include <linux/namei.h>
#include <linux/poll.h>
@ -453,44 +452,6 @@ int sysfs_add_file_to_group(struct kobject *kobj,
}
EXPORT_SYMBOL_GPL(sysfs_add_file_to_group);
/**
* sysfs_update_file - update the modified timestamp on an object attribute.
* @kobj: object we're acting for.
* @attr: attribute descriptor.
*/
int sysfs_update_file(struct kobject * kobj, const struct attribute * attr)
{
struct sysfs_dirent *victim_sd = NULL;
struct dentry *victim = NULL;
int rc;
rc = -ENOENT;
victim_sd = sysfs_get_dirent(kobj->sd, attr->name);
if (!victim_sd)
goto out;
mutex_lock(&sysfs_rename_mutex);
victim = sysfs_get_dentry(victim_sd);
mutex_unlock(&sysfs_rename_mutex);
if (IS_ERR(victim)) {
rc = PTR_ERR(victim);
victim = NULL;
goto out;
}
mutex_lock(&victim->d_inode->i_mutex);
victim->d_inode->i_mtime = CURRENT_TIME;
fsnotify_modify(victim);
mutex_unlock(&victim->d_inode->i_mutex);
rc = 0;
out:
dput(victim);
sysfs_put(victim_sd);
return rc;
}
/**
* sysfs_chmod_file - update the modified mode value on an object attribute.
* @kobj: object we're acting for.
@ -641,4 +602,3 @@ EXPORT_SYMBOL_GPL(sysfs_schedule_callback);
EXPORT_SYMBOL_GPL(sysfs_create_file);
EXPORT_SYMBOL_GPL(sysfs_remove_file);
EXPORT_SYMBOL_GPL(sysfs_update_file);

7
include/linux/sysfs.h
View File

@ -87,8 +87,6 @@ int __must_check sysfs_move_dir(struct kobject *kobj,
int __must_check sysfs_create_file(struct kobject *kobj,
const struct attribute *attr);
int __must_check sysfs_update_file(struct kobject *kobj,
const struct attribute *attr);
int __must_check sysfs_chmod_file(struct kobject *kobj, struct attribute *attr,
mode_t mode);
void sysfs_remove_file(struct kobject *kobj, const struct attribute *attr);
@ -149,11 +147,6 @@ static inline int sysfs_create_file(struct kobject *kobj,
return 0;
}
static inline int sysfs_update_file(struct kobject *kobj,
const struct attribute *attr)
{
return 0;
}
static inline int sysfs_chmod_file(struct kobject *kobj,
struct attribute *attr, mode_t mode)
{