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authorTejun Heo <htejun@gmail.com>2007-06-14 03:45:17 +0900
committerGreg Kroah-Hartman <gregkh@suse.de>2007-07-11 16:09:06 -0700
commit7b595756ec1f49e0049a9e01a1298d53a7faaa15 (patch)
treecd06687ab3e5c7a5a4ef91903dff207a18c4db76 /include
parentdbde0fcf9f8f6d477af3c32d9979e789ee680cde (diff)
sysfs: kill unnecessary attribute->owner
sysfs is now completely out of driver/module lifetime game. After deletion, a sysfs node doesn't access anything outside sysfs proper, so there's no reason to hold onto the attribute owners. Note that often the wrong modules were accounted for as owners leading to accessing removed modules. This patch kills now unnecessary attribute->owner. Note that with this change, userland holding a sysfs node does not prevent the backing module from being unloaded. For more info regarding lifetime rule cleanup, please read the following message. http://article.gmane.org/gmane.linux.kernel/510293 (tweaked by Greg to not delete the field just yet, to make it easier to merge things properly.) Signed-off-by: Tejun Heo <htejun@gmail.com> Cc: Cornelia Huck <cornelia.huck@de.ibm.com> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'include')
-rw-r--r--include/linux/sysdev.h3
-rw-r--r--include/linux/sysfs.h12
2 files changed, 9 insertions, 6 deletions
diff --git a/include/linux/sysdev.h b/include/linux/sysdev.h
index e699ab279c2..e285746588d 100644
--- a/include/linux/sysdev.h
+++ b/include/linux/sysdev.h
@@ -101,8 +101,7 @@ struct sysdev_attribute {
#define _SYSDEV_ATTR(_name,_mode,_show,_store) \
{ \
- .attr = { .name = __stringify(_name), .mode = _mode, \
- .owner = THIS_MODULE }, \
+ .attr = { .name = __stringify(_name), .mode = _mode }, \
.show = _show, \
.store = _store, \
}
diff --git a/include/linux/sysfs.h b/include/linux/sysfs.h
index 2f86b080b39..161e19aa2b4 100644
--- a/include/linux/sysfs.h
+++ b/include/linux/sysfs.h
@@ -20,9 +20,13 @@ struct module;
struct nameidata;
struct dentry;
+/* FIXME
+ * The *owner field is no longer used, but leave around
+ * until the tree gets cleaned up fully.
+ */
struct attribute {
const char * name;
- struct module * owner;
+ struct module * owner;
mode_t mode;
};
@@ -39,14 +43,14 @@ struct attribute_group {
*/
#define __ATTR(_name,_mode,_show,_store) { \
- .attr = {.name = __stringify(_name), .mode = _mode, .owner = THIS_MODULE }, \
+ .attr = {.name = __stringify(_name), .mode = _mode }, \
.show = _show, \
.store = _store, \
}
#define __ATTR_RO(_name) { \
- .attr = { .name = __stringify(_name), .mode = 0444, .owner = THIS_MODULE }, \
- .show = _name##_show, \
+ .attr = { .name = __stringify(_name), .mode = 0444 }, \
+ .show = _name##_show, \
}
#define __ATTR_NULL { .attr = { .name = NULL } }