[PATCH 036/196] kobject: convert icom to use kref, not kobject

Greg Kroah-Hartman
2008-01-25T07:26:36Z

The IBM icom serial 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: Anton Blanchard <anton@au.ibm.com>
Cc: Paul Mackerras <paulus@au.ibm.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Ryan S. Arnold <rsa@us.ibm.com>
Cc: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
drivers/serial/icom.c | 24 ++++++++++--------------
drivers/serial/icom.h | 2 +-
2 files changed, 11 insertions(+), 15 deletions(-)

diff --git a/drivers/serial/icom.c b/drivers/serial/icom.c
index 9d3105b..9c2df5c 100644
--- a/drivers/serial/icom.c
+++ b/drivers/serial/icom.c
@@ -48,7 +48,7 @@
#include <linux/vmalloc.h>
#include <linux/smp.h>
#include <linux/spinlock.h>
-#include <linux/kobject.h>
+#include <linux/kref.h>
#include <linux/firmware.h>
#include <linux/bitops.h>

@@ -65,7 +65,7 @@
#define ICOM_VERSION_STR "1.3.1"
#define NR_PORTS 128
#define ICOM_PORT ((struct icom_port *)port)
-#define to_icom_adapter(d) container_of(d, struct icom_adapter, kobj)
+#define to_icom_adapter(d) container_of(d, struct icom_adapter, kref)

static const struct pci_device_id icom_pci_table[] = {
{
@@ -141,6 +141,7 @@ static inline void trace(struct icom_port *, char *, unsigned long) {};
#else
static inline void trace(struct icom_port *icom_port, char *trace_pt, unsigned long trace_data) {};
#endif
+static void icom_kref_release(struct kref *kref);

static void free_port_memory(struct icom_port *icom_port)
{
@@ -1063,11 +1064,11 @@ static int icom_open(struct uart_port *port)
{
int retval;

- kobject_get(&ICOM_PORT->adapter->kobj);
+ kref_get(&ICOM_PORT->adapter->kref);
retval = startup(ICOM_PORT);

if (retval) {
- kobject_put(&ICOM_PORT->adapter->kobj);
+ kref_put(&ICOM_PORT->adapter->kref, icom_kref_release);
trace(ICOM_PORT, "STARTUP_ERROR", 0);
return retval;
}
@@ -1088,7 +1089,7 @@ static void icom_close(struct uart_port *port)

shutdown(ICOM_PORT);

- kobject_put(&ICOM_PORT->adapter->kobj);
+ kref_put(&ICOM_PORT->adapter->kref, icom_kref_release);
}

static void icom_set_termios(struct uart_port *port,
@@ -1485,18 +1486,14 @@ static void icom_remove_adapter(struct icom_adapter *icom_adapter)
pci_release_regions(icom_adapter->pci_dev);
}

-static void icom_kobj_release(struct kobject *kobj)
+static void icom_kref_release(struct kref *kref)
{
struct icom_adapter *icom_adapter;

- icom_adapter = to_icom_adapter(kobj);
+ icom_adapter = to_icom_adapter(kref);
icom_remove_adapter(icom_adapter);
}

-static struct kobj_type icom_kobj_type = {
- .release = icom_kobj_release,
-};
-
static int __devinit icom_probe(struct pci_dev *dev,
const struct pci_device_id *ent)
{
@@ -1592,8 +1589,7 @@ static int __devinit icom_probe(struct pci_dev *dev,
}
}

- kobject_init(&icom_adapter->kobj);
- icom_adapter->kobj.ktype = &icom_kobj_type;
+ kref_init(&icom_adapter->kref);
return 0;

probe_exit2:
@@ -1619,7 +1615,7 @@ static void __devexit icom_remove(struct pci_dev *dev)
icom_adapter = list_entry(tmp, struct icom_adapter,
icom_adapter_entry);
if (icom_adapter->pci_dev == dev) {
- kobject_put(&icom_adapter->kobj);
+ kref_put(&icom_adapter->kref, icom_kref_release);
return;
}
}
diff --git a/drivers/serial/icom.h b/drivers/serial/icom.h
index e8578d8..0274554 100644
--- a/drivers/serial/icom.h
+++ b/drivers/serial/icom.h
@@ -270,7 +270,7 @@ struct icom_adapter {
#define V2_ONE_PORT_RVX_ONE_PORT_IMBED_MDM 0x0251
int numb_ports;
struct list_head icom_adapter_entry;
- struct kobject kobj;
+ struct kref kref;
};

/* prototype */
--
1.5.3.8