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>

2 files changed, 2 insertions, 4 deletions

diff --git a/net/bridge/br_sysfs_br.c b/net/bridge/br_sysfs_br.c
index 33c6c4a7c68..31ace23a091 100644
--- a/net/bridge/br_sysfs_br.c
+++ b/net/bridge/br_sysfs_br.c
@@ -383,8 +383,7 @@ static ssize_t brforward_read(struct kobject *kobj, char *buf,
 
 static struct bin_attribute bridge_forward = {
         .attr = { .name = SYSFS_BRIDGE_FDB,
-                  .mode = S_IRUGO,
-                  .owner = THIS_MODULE, },
+                  .mode = S_IRUGO, },
         .read = brforward_read,
 };
 
diff --git a/net/bridge/br_sysfs_if.c b/net/bridge/br_sysfs_if.c
index 2da22927d8d..79db51fcb47 100644
--- a/net/bridge/br_sysfs_if.c
+++ b/net/bridge/br_sysfs_if.c
@@ -29,8 +29,7 @@ struct brport_attribute {
 #define BRPORT_ATTR(_name,_mode,_show,_store)                   \
 struct brport_attribute brport_attr_##_name = {                 \
         .attr = {.name = __stringify(_name),                    \
-                 .mode = _mode,                                 \
-                 .owner = THIS_MODULE, },                       \
+                 .mode = _mode },                               \
         .show   = _show,                                        \
         .store  = _store,                                       \
 };