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>
diff --git a/drivers/misc/ibmasm/command.c b/drivers/misc/ibmasm/command.c
index 6497872..1a0e7978 100644
--- a/drivers/misc/ibmasm/command.c
+++ b/drivers/misc/ibmasm/command.c
@@ -26,11 +26,6 @@
#include "lowlevel.h"
static void exec_next_command(struct service_processor *sp);
-static void free_command(struct kobject *kobj);
-
-static struct kobj_type ibmasm_cmd_kobj_type = {
- .release = free_command,
-};
static atomic_t command_count = ATOMIC_INIT(0);
@@ -53,8 +48,7 @@
}
cmd->buffer_size = buffer_size;
- kobject_init(&cmd->kobj);
- cmd->kobj.ktype = &ibmasm_cmd_kobj_type;
+ kref_init(&cmd->kref);
cmd->lock = &sp->lock;
cmd->status = IBMASM_CMD_PENDING;
@@ -67,9 +61,9 @@
return cmd;
}
-static void free_command(struct kobject *kobj)
+void ibmasm_free_command(struct kref *kref)
{
- struct command *cmd = to_command(kobj);
+ struct command *cmd = to_command(kref);
list_del(&cmd->queue_node);
atomic_dec(&command_count);
diff --git a/drivers/misc/ibmasm/ibmasm.h b/drivers/misc/ibmasm/ibmasm.h
index de860bc..4d8a4e2 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 @@
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);
}