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>

3 files changed, 2 insertions, 4 deletions

diff --git a/drivers/cpufreq/cpufreq_stats.c b/drivers/cpufreq/cpufreq_stats.c
index d2f0cbd8b8f3..917b9bab9ccb 100644
--- a/drivers/cpufreq/cpufreq_stats.c
+++ b/drivers/cpufreq/cpufreq_stats.c
@@ -25,8 +25,7 @@ static spinlock_t cpufreq_stats_lock;
 
 #define CPUFREQ_STATDEVICE_ATTR(_name,_mode,_show) \
 static struct freq_attr _attr_##_name = {\
-        .attr = {.name = __stringify(_name), .owner = THIS_MODULE, \
-                .mode = _mode, }, \
+        .attr = {.name = __stringify(_name), .mode = _mode, }, \
         .show = _show,\
 };
 
diff --git a/drivers/cpufreq/cpufreq_userspace.c b/drivers/cpufreq/cpufreq_userspace.c
index 860345c7799a..a648970338b0 100644
--- a/drivers/cpufreq/cpufreq_userspace.c
+++ b/drivers/cpufreq/cpufreq_userspace.c
@@ -120,7 +120,7 @@ store_speed (struct cpufreq_policy *policy, const char *buf, size_t count)
 
 static struct freq_attr freq_attr_scaling_setspeed =
 {
-        .attr = { .name = "scaling_setspeed", .mode = 0644, .owner = THIS_MODULE },
+        .attr = { .name = "scaling_setspeed", .mode = 0644 },
         .show = show_speed,
         .store = store_speed,
 };
diff --git a/drivers/cpufreq/freq_table.c b/drivers/cpufreq/freq_table.c
index e7490925fdcf..5409f3afb3f8 100644
--- a/drivers/cpufreq/freq_table.c
+++ b/drivers/cpufreq/freq_table.c
@@ -199,7 +199,6 @@ static ssize_t show_available_freqs (struct cpufreq_policy *policy, char *buf)
 struct freq_attr cpufreq_freq_attr_scaling_available_freqs = {
         .attr = { .name = "scaling_available_frequencies",
                   .mode = 0444,
-                  .owner=THIS_MODULE
                 },
         .show = show_available_freqs,
 };