kobject: convert ibmasm to use kref, not kobject

The IBM asm driver is using a kobject only for reference counting,
nothing else.  So switch it to use a kref instead, which is all that is
needed, and is much smaller.

Cc: Max Asböck <amax@us.ibm.com>
Cc: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 6 insertions, 4 deletions

diff --git a/drivers/misc/ibmasm/ibmasm.h b/drivers/misc/ibmasm/ibmasm.h
index de860bc6d3f5..4d8a4e248b34 100644
--- a/drivers/misc/ibmasm/ibmasm.h
+++ b/drivers/misc/ibmasm/ibmasm.h
@@ -31,6 +31,7 @@
 #include <linux/slab.h>
 #include <linux/module.h>
 #include <linux/interrupt.h>
+#include <linux/kref.h>
 #include <linux/device.h>
 #include <linux/input.h>
 
@@ -92,24 +93,25 @@ struct command {
         unsigned char           *buffer;
         size_t                  buffer_size;
         int                     status;
-        struct kobject          kobj;
+        struct kref             kref;
         spinlock_t              *lock;
 };
-#define to_command(c) container_of(c, struct command, kobj)
+#define to_command(c) container_of(c, struct command, kref)
 
+void ibmasm_free_command(struct kref *kref);
 static inline void command_put(struct command *cmd)
 {
         unsigned long flags;
         spinlock_t *lock = cmd->lock;
 
         spin_lock_irqsave(lock, flags);
-        kobject_put(&cmd->kobj);
+        kref_put(&cmd->kref, ibmasm_free_command);
         spin_unlock_irqrestore(lock, flags);
 }
 
 static inline void command_get(struct command *cmd)
 {
-        kobject_get(&cmd->kobj);
+        kref_get(&cmd->kref);
 }