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Subject[patch] kref shrinkage patches -- 2 of 2 -- kref shrinkage
Here's the patch to change current kref users to use the modified 
kref_init and kref_put api (result of kref object shrinkage).

Thanks,
Kiran


scsi/sd.c | 8 +-
scsi/sr.c | 8 +-
usb/core/config.c | 5 +
usb/core/message.c | 3 -
usb/core/urb.c | 4 -
usb/host/ehci-mem.c | 4 -
usb/serial/usb-serial.c | 136 ++++++++++++++++++++++++------------------------
7 files changed, 85 insertions(+), 83 deletions(-)
Signed-off-by: Ravikiran Thirumalai <kiran@in.ibm.com>

diff -ruN -X dontdiff2 linux-2.6.7/drivers/scsi/sd.c kref-2.6.7/drivers/scsi/sd.c
--- linux-2.6.7/drivers/scsi/sd.c 2004-06-16 10:49:44.000000000 +0530
+++ kref-2.6.7/drivers/scsi/sd.c 2004-07-20 13:03:49.000000000 +0530
@@ -186,7 +186,7 @@
return sdkp;

out_put:
- kref_put(&sdkp->kref);
+ kref_put(&sdkp->kref, scsi_disk_release);
out_sdkp:
sdkp = NULL;
out:
@@ -198,7 +198,7 @@
{
down(&sd_ref_sem);
scsi_device_put(sdkp->device);
- kref_put(&sdkp->kref);
+ kref_put(&sdkp->kref, scsi_disk_release);
up(&sd_ref_sem);
}

@@ -1360,7 +1360,7 @@
goto out;

memset (sdkp, 0, sizeof(*sdkp));
- kref_init(&sdkp->kref, scsi_disk_release);
+ kref_init(&sdkp->kref);

/* Note: We can accomodate 64 partitions, but the genhd code
* assumes partitions allocate consecutive minors, which they don't.
@@ -1462,7 +1462,7 @@
del_gendisk(sdkp->disk);
sd_shutdown(dev);
down(&sd_ref_sem);
- kref_put(&sdkp->kref);
+ kref_put(&sdkp->kref, scsi_disk_release);
up(&sd_ref_sem);

return 0;
diff -ruN -X dontdiff2 linux-2.6.7/drivers/scsi/sr.c kref-2.6.7/drivers/scsi/sr.c
--- linux-2.6.7/drivers/scsi/sr.c 2004-06-16 10:50:27.000000000 +0530
+++ kref-2.6.7/drivers/scsi/sr.c 2004-07-20 13:03:49.000000000 +0530
@@ -144,7 +144,7 @@
goto out;

out_put:
- kref_put(&cd->kref);
+ kref_put(&cd->kref, sr_kref_release);
out_null:
cd = NULL;
out:
@@ -156,7 +156,7 @@
{
down(&sr_ref_sem);
scsi_device_put(cd->device);
- kref_put(&cd->kref);
+ kref_put(&cd->kref, sr_kref_release);
up(&sr_ref_sem);
}

@@ -573,7 +573,7 @@
goto fail;
memset(cd, 0, sizeof(*cd));

- kref_init(&cd->kref, sr_kref_release);
+ kref_init(&cd->kref);

disk = alloc_disk(1);
if (!disk)
@@ -952,7 +952,7 @@
del_gendisk(cd->disk);

down(&sr_ref_sem);
- kref_put(&cd->kref);
+ kref_put(&cd->kref, sr_kref_release);
up(&sr_ref_sem);

return 0;
diff -ruN -X dontdiff2 linux-2.6.7/drivers/usb/core/config.c kref-2.6.7/drivers/usb/core/config.c
--- linux-2.6.7/drivers/usb/core/config.c 2004-06-16 10:48:52.000000000 +0530
+++ kref-2.6.7/drivers/usb/core/config.c 2004-07-20 13:03:49.000000000 +0530
@@ -356,7 +356,7 @@
if (!intfc)
return -ENOMEM;
memset(intfc, 0, len);
- kref_init(&intfc->ref, usb_release_interface_cache);
+ kref_init(&intfc->ref);
}

/* Skip over any Class Specific or Vendor Specific descriptors;
@@ -422,7 +422,8 @@

for (i = 0; i < cf->desc.bNumInterfaces; i++) {
if (cf->intf_cache[i])
- kref_put(&cf->intf_cache[i]->ref);
+ kref_put(&cf->intf_cache[i]->ref,
+ usb_release_interface_cache);
}
}
kfree(dev->config);
diff -ruN -X dontdiff2 linux-2.6.7/drivers/usb/core/message.c kref-2.6.7/drivers/usb/core/message.c
--- linux-2.6.7/drivers/usb/core/message.c 2004-06-16 10:49:02.000000000 +0530
+++ kref-2.6.7/drivers/usb/core/message.c 2004-07-20 15:07:24.000000000 +0530
@@ -1077,11 +1077,12 @@

static void release_interface(struct device *dev)
{
+ extern void destroy_serial(struct kref *kref);
struct usb_interface *intf = to_usb_interface(dev);
struct usb_interface_cache *intfc =
altsetting_to_usb_interface_cache(intf->altsetting);

- kref_put(&intfc->ref);
+ kref_put(&intfc->ref, destroy_serial);
kfree(intf);
}

diff -ruN -X dontdiff2 linux-2.6.7/drivers/usb/core/urb.c kref-2.6.7/drivers/usb/core/urb.c
--- linux-2.6.7/drivers/usb/core/urb.c 2004-06-16 10:49:36.000000000 +0530
+++ kref-2.6.7/drivers/usb/core/urb.c 2004-07-20 13:03:49.000000000 +0530
@@ -39,7 +39,7 @@
{
if (urb) {
memset(urb, 0, sizeof(*urb));
- kref_init(&urb->kref, urb_destroy);
+ kref_init(&urb->kref);
spin_lock_init(&urb->lock);
}
}
@@ -88,7 +88,7 @@
void usb_free_urb(struct urb *urb)
{
if (urb)
- kref_put(&urb->kref);
+ kref_put(&urb->kref, urb_destroy);
}

/**
diff -ruN -X dontdiff2 linux-2.6.7/drivers/usb/host/ehci-mem.c kref-2.6.7/drivers/usb/host/ehci-mem.c
--- linux-2.6.7/drivers/usb/host/ehci-mem.c 2004-06-16 10:50:03.000000000 +0530
+++ kref-2.6.7/drivers/usb/host/ehci-mem.c 2004-07-20 13:03:49.000000000 +0530
@@ -114,7 +114,7 @@
return qh;

memset (qh, 0, sizeof *qh);
- kref_init(&qh->kref, qh_destroy);
+ kref_init(&qh->kref);
qh->ehci = ehci;
qh->qh_dma = dma;
// INIT_LIST_HEAD (&qh->qh_list);
@@ -139,7 +139,7 @@

static inline void qh_put (struct ehci_qh *qh)
{
- kref_put(&qh->kref);
+ kref_put(&qh->kref, qh_destroy);
}

/*-------------------------------------------------------------------------*/
diff -ruN -X dontdiff2 linux-2.6.7/drivers/usb/serial/usb-serial.c kref-2.6.7/drivers/usb/serial/usb-serial.c
--- linux-2.6.7/drivers/usb/serial/usb-serial.c 2004-06-16 10:49:17.000000000 +0530
+++ kref-2.6.7/drivers/usb/serial/usb-serial.c 2004-07-20 15:07:52.000000000 +0530
@@ -443,6 +443,69 @@
return;
}

+static void serial_shutdown (struct usb_serial *serial)
+{
+ dbg ("%s", __FUNCTION__);
+
+ serial->type->shutdown(serial);
+}
+
+void destroy_serial(struct kref *kref)
+{
+ struct usb_serial *serial;
+ struct usb_serial_port *port;
+ int i;
+
+ serial = to_usb_serial(kref);
+
+ dbg ("%s - %s", __FUNCTION__, serial->type->name);
+ serial_shutdown (serial);
+
+ /* return the minor range that this device had */
+ return_serial(serial);
+
+ for (i = 0; i < serial->num_ports; ++i)
+ serial->port[i]->open_count = 0;
+
+ /* the ports are cleaned up and released in port_release() */
+ for (i = 0; i < serial->num_ports; ++i)
+ if (serial->port[i]->dev.parent != NULL) {
+ device_unregister(&serial->port[i]->dev);
+ serial->port[i] = NULL;
+ }
+
+ /* If this is a "fake" port, we have to clean it up here, as it will
+ * not get cleaned up in port_release() as it was never registered with
+ * the driver core */
+ if (serial->num_ports < serial->num_port_pointers) {
+ for (i = serial->num_ports; i < serial->num_port_pointers; ++i) {
+ port = serial->port[i];
+ if (!port)
+ continue;
+ if (port->read_urb) {
+ usb_unlink_urb(port->read_urb);
+ usb_free_urb(port->read_urb);
+ }
+ if (port->write_urb) {
+ usb_unlink_urb(port->write_urb);
+ usb_free_urb(port->write_urb);
+ }
+ if (port->interrupt_in_urb) {
+ usb_unlink_urb(port->interrupt_in_urb);
+ usb_free_urb(port->interrupt_in_urb);
+ }
+ kfree(port->bulk_in_buffer);
+ kfree(port->bulk_out_buffer);
+ kfree(port->interrupt_in_buffer);
+ }
+ }
+
+ usb_put_dev(serial->dev);
+
+ /* free up any memory that we allocated */
+ kfree (serial);
+}
+
/*****************************************************************************
* Driver tty interface functions
*****************************************************************************/
@@ -487,7 +550,7 @@
if (retval) {
port->open_count = 0;
module_put(serial->type->owner);
- kref_put(&serial->kref);
+ kref_put(&serial->kref, destroy_serial);
}
}
bailout:
@@ -518,7 +581,7 @@
}

module_put(port->serial->type->owner);
- kref_put(&port->serial->kref);
+ kref_put(&port->serial->kref, destroy_serial);
}

static int serial_write (struct tty_struct * tty, int from_user, const unsigned char *buf, int count)
@@ -676,13 +739,6 @@
;
}

-static void serial_shutdown (struct usb_serial *serial)
-{
- dbg ("%s", __FUNCTION__);
-
- serial->type->shutdown(serial);
-}
-
static int serial_read_proc (char *page, char **start, off_t off, int count, int *eof, void *data)
{
struct usb_serial *serial;
@@ -716,7 +772,7 @@
begin += length;
length = 0;
}
- kref_put(&serial->kref);
+ kref_put(&serial->kref, destroy_serial);
}
*eof = 1;
done:
@@ -785,62 +841,6 @@
wake_up_interruptible(&tty->write_wait);
}

-static void destroy_serial(struct kref *kref)
-{
- struct usb_serial *serial;
- struct usb_serial_port *port;
- int i;
-
- serial = to_usb_serial(kref);
-
- dbg ("%s - %s", __FUNCTION__, serial->type->name);
- serial_shutdown (serial);
-
- /* return the minor range that this device had */
- return_serial(serial);
-
- for (i = 0; i < serial->num_ports; ++i)
- serial->port[i]->open_count = 0;
-
- /* the ports are cleaned up and released in port_release() */
- for (i = 0; i < serial->num_ports; ++i)
- if (serial->port[i]->dev.parent != NULL) {
- device_unregister(&serial->port[i]->dev);
- serial->port[i] = NULL;
- }
-
- /* If this is a "fake" port, we have to clean it up here, as it will
- * not get cleaned up in port_release() as it was never registered with
- * the driver core */
- if (serial->num_ports < serial->num_port_pointers) {
- for (i = serial->num_ports; i < serial->num_port_pointers; ++i) {
- port = serial->port[i];
- if (!port)
- continue;
- if (port->read_urb) {
- usb_unlink_urb(port->read_urb);
- usb_free_urb(port->read_urb);
- }
- if (port->write_urb) {
- usb_unlink_urb(port->write_urb);
- usb_free_urb(port->write_urb);
- }
- if (port->interrupt_in_urb) {
- usb_unlink_urb(port->interrupt_in_urb);
- usb_free_urb(port->interrupt_in_urb);
- }
- kfree(port->bulk_in_buffer);
- kfree(port->bulk_out_buffer);
- kfree(port->interrupt_in_buffer);
- }
- }
-
- usb_put_dev(serial->dev);
-
- /* free up any memory that we allocated */
- kfree (serial);
-}
-
static void port_release(struct device *dev)
{
struct usb_serial_port *port = to_usb_serial_port(dev);
@@ -881,7 +881,7 @@
serial->interface = interface;
serial->vendor = dev->descriptor.idVendor;
serial->product = dev->descriptor.idProduct;
- kref_init(&serial->kref, destroy_serial);
+ kref_init(&serial->kref);

return serial;
}
@@ -1231,7 +1231,7 @@
if (serial) {
/* let the last holder of this object
* cause it to be cleaned up */
- kref_put(&serial->kref);
+ kref_put(&serial->kref, destroy_serial);
}
dev_info(dev, "device disconnected\n");
}
-
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