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Date: Fri, 08 Dec 2006 14:59:40 +0000
From: David Howells <dhowells@...hat.com>
To: torvalds@...l.org, akpm@...l.org, schwidefsky@...ibm.com
Cc: linux390@...ibm.com, linux-kernel@...r.kernel.org,
linux-arch@...r.kernel.org, dhowells@...hat.com
Subject: [PATCH] WorkStruct: Fix S390 driver workstruct usage
Fix S390 driver workstruct reduction problems.
Signed-Off-By: David Howells <dhowells@...hat.com>
---
drivers/s390/char/ctrlchar.c | 9 +++++----
drivers/s390/char/tape.h | 3 ++-
drivers/s390/char/tape_34xx.c | 26 ++++++++++++--------------
drivers/s390/char/tape_block.c | 13 ++++++-------
drivers/s390/char/tape_core.c | 12 ++++++------
drivers/s390/cio/css.h | 1 +
drivers/s390/cio/device.c | 33 ++++++++++++++++-----------------
drivers/s390/cio/device.h | 4 ++--
drivers/s390/cio/device_fsm.c | 34 ++++++++++++++++------------------
drivers/s390/cio/qdio.c | 6 +++---
10 files changed, 69 insertions(+), 72 deletions(-)
diff --git a/drivers/s390/char/ctrlchar.c b/drivers/s390/char/ctrlchar.c
index 49e9628..9fcfe3a 100644
--- a/drivers/s390/char/ctrlchar.c
+++ b/drivers/s390/char/ctrlchar.c
@@ -15,15 +15,16 @@ #include <linux/ctype.h>
#include "ctrlchar.h"
#ifdef CONFIG_MAGIC_SYSRQ
+static struct tty_struct *ctrlchar_sysrq_tty;
static int ctrlchar_sysrq_key;
static void
-ctrlchar_handle_sysrq(void *tty)
+ctrlchar_handle_sysrq(struct work_struct *unused)
{
- handle_sysrq(ctrlchar_sysrq_key, (struct tty_struct *) tty);
+ handle_sysrq(ctrlchar_sysrq_key, ctrlchar_sysrq_tty);
}
-static DECLARE_WORK(ctrlchar_work, ctrlchar_handle_sysrq, NULL);
+static DECLARE_WORK(ctrlchar_work, ctrlchar_handle_sysrq);
#endif
@@ -52,8 +53,8 @@ ctrlchar_handle(const unsigned char *buf
#ifdef CONFIG_MAGIC_SYSRQ
/* racy */
if (len == 3 && buf[1] == '-') {
+ ctrlchar_sysrq_tty = tty;
ctrlchar_sysrq_key = buf[2];
- ctrlchar_work.data = tty;
schedule_work(&ctrlchar_work);
return CTRLCHAR_SYSRQ;
}
diff --git a/drivers/s390/char/tape.h b/drivers/s390/char/tape.h
index 1f4c899..1323142 100644
--- a/drivers/s390/char/tape.h
+++ b/drivers/s390/char/tape.h
@@ -185,6 +185,7 @@ struct tape_blk_data
/* Task to move entries from block request to CCS request queue. */
struct work_struct requeue_task;
+ void * requeue_task_data;
atomic_t requeue_scheduled;
/* Current position on the tape. */
@@ -240,7 +241,7 @@ #ifdef CONFIG_S390_TAPE_BLOCK
#endif
/* Function to start or stop the next request later. */
- struct work_struct tape_dnr;
+ struct delayed_work tape_dnr;
};
/* Externals from tape_core.c */
diff --git a/drivers/s390/char/tape_34xx.c b/drivers/s390/char/tape_34xx.c
index 7b95dab..b5ebc97 100644
--- a/drivers/s390/char/tape_34xx.c
+++ b/drivers/s390/char/tape_34xx.c
@@ -102,14 +102,17 @@ tape_34xx_medium_sense(struct tape_devic
* Maybe that's useful for other actions we want to start from the
* interrupt handler.
*/
+struct tape_34xx_work_item {
+ struct tape_device *device;
+ enum tape_op op;
+ struct work_struct work;
+};
+
static void
-tape_34xx_work_handler(void *data)
+tape_34xx_work_handler(struct work_struct *work)
{
- struct {
- struct tape_device *device;
- enum tape_op op;
- struct work_struct work;
- } *p = data;
+ struct tape_34xx_work_item *p =
+ container_of(work, struct tape_34xx_work_item, work);
switch(p->op) {
case TO_MSEN:
@@ -126,17 +129,12 @@ tape_34xx_work_handler(void *data)
static int
tape_34xx_schedule_work(struct tape_device *device, enum tape_op op)
{
- struct {
- struct tape_device *device;
- enum tape_op op;
- struct work_struct work;
- } *p;
+ struct tape_34xx_work_item *p;
- if ((p = kmalloc(sizeof(*p), GFP_ATOMIC)) == NULL)
+ if ((p = kzalloc(sizeof(*p), GFP_ATOMIC)) == NULL)
return -ENOMEM;
- memset(p, 0, sizeof(*p));
- INIT_WORK(&p->work, tape_34xx_work_handler, p);
+ INIT_WORK(&p->work, tape_34xx_work_handler);
p->device = tape_get_device_reference(device);
p->op = op;
diff --git a/drivers/s390/char/tape_block.c b/drivers/s390/char/tape_block.c
index 3225fcd..f2e0f78 100644
--- a/drivers/s390/char/tape_block.c
+++ b/drivers/s390/char/tape_block.c
@@ -143,7 +143,8 @@ tapeblock_start_request(struct tape_devi
* queue.
*/
static void
-tapeblock_requeue(void *data) {
+tapeblock_requeue(struct work_struct *work)
+{
struct tape_device * device;
request_queue_t * queue;
int nr_queued;
@@ -151,9 +152,7 @@ tapeblock_requeue(void *data) {
struct list_head * l;
int rc;
- device = (struct tape_device *) data;
- if (!device)
- return;
+ device = container_of(work, struct tape_device, blk_data.requeue_task);
spin_lock_irq(get_ccwdev_lock(device->cdev));
queue = device->blk_data.request_queue;
@@ -255,8 +254,8 @@ tapeblock_setup_device(struct tape_devic
add_disk(disk);
- INIT_WORK(&blkdat->requeue_task, tapeblock_requeue,
- tape_get_device_reference(device));
+ tape_get_device_reference(device);
+ INIT_WORK(&blkdat->requeue_task, tapeblock_requeue);
return 0;
@@ -271,7 +270,7 @@ void
tapeblock_cleanup_device(struct tape_device *device)
{
flush_scheduled_work();
- device->blk_data.requeue_task.data = tape_put_device(device);
+ tape_put_device(device);
if (!device->blk_data.disk) {
PRINT_ERR("(%s): No gendisk to clean up!\n",
diff --git a/drivers/s390/char/tape_core.c b/drivers/s390/char/tape_core.c
index 2826aed..0ee5b03 100644
--- a/drivers/s390/char/tape_core.c
+++ b/drivers/s390/char/tape_core.c
@@ -28,7 +28,7 @@ #include "tape_std.h"
#define PRINTK_HEADER "TAPE_CORE: "
static void __tape_do_irq (struct ccw_device *, unsigned long, struct irb *);
-static void tape_delayed_next_request(void * data);
+static void tape_delayed_next_request(struct work_struct *work);
/*
* One list to contain all tape devices of all disciplines, so
@@ -272,7 +272,7 @@ __tape_cancel_io(struct tape_device *dev
return 0;
case -EBUSY:
request->status = TAPE_REQUEST_CANCEL;
- schedule_work(&device->tape_dnr);
+ schedule_delayed_work(&device->tape_dnr, 0);
return 0;
case -ENODEV:
DBF_EXCEPTION(2, "device gone, retry\n");
@@ -470,7 +470,7 @@ tape_alloc_device(void)
*device->modeset_byte = 0;
device->first_minor = -1;
atomic_set(&device->ref_count, 1);
- INIT_WORK(&device->tape_dnr, tape_delayed_next_request, device);
+ INIT_DELAYED_WORK(&device->tape_dnr, tape_delayed_next_request);
return device;
}
@@ -724,7 +724,7 @@ #endif
} else if (rc == -EBUSY) {
/* The common I/O subsystem is currently busy. Retry later. */
request->status = TAPE_REQUEST_QUEUED;
- schedule_work(&device->tape_dnr);
+ schedule_delayed_work(&device->tape_dnr, 0);
rc = 0;
} else {
/* Start failed. Remove request and indicate failure. */
@@ -790,11 +790,11 @@ __tape_start_next_request(struct tape_de
}
static void
-tape_delayed_next_request(void *data)
+tape_delayed_next_request(struct work_struct *work)
{
struct tape_device * device;
- device = (struct tape_device *) data;
+ device = container_of(work, struct tape_device, tape_dnr.work);
DBF_LH(6, "tape_delayed_next_request(%p)\n", device);
spin_lock_irq(get_ccwdev_lock(device->cdev));
__tape_start_next_request(device);
diff --git a/drivers/s390/cio/css.h b/drivers/s390/cio/css.h
index 9ff064e..d36440c 100644
--- a/drivers/s390/cio/css.h
+++ b/drivers/s390/cio/css.h
@@ -103,6 +103,7 @@ struct ccw_device_private {
struct pgid pgid[8]; /* path group IDs per chpid*/
struct ccw1 iccws[2]; /* ccws for SNID/SID/SPGID commands */
struct work_struct kick_work;
+ struct ccw_device *cdev;
wait_queue_head_t wait_q;
struct timer_list timer;
void *cmb; /* measurement information */
diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c
index d3d3716..725ade4 100644
--- a/drivers/s390/cio/device.c
+++ b/drivers/s390/cio/device.c
@@ -585,12 +585,11 @@ static struct ccw_device * get_disc_ccwd
}
static void
-ccw_device_add_changed(void *data)
+ccw_device_add_changed(struct work_struct *work)
{
-
struct ccw_device *cdev;
- cdev = data;
+ cdev = container_of(work, struct ccw_device_private, kick_work)->cdev;
if (device_add(&cdev->dev)) {
put_device(&cdev->dev);
return;
@@ -605,13 +604,13 @@ ccw_device_add_changed(void *data)
extern int css_get_ssd_info(struct subchannel *sch);
void
-ccw_device_do_unreg_rereg(void *data)
+ccw_device_do_unreg_rereg(struct work_struct *work)
{
struct ccw_device *cdev;
struct subchannel *sch;
int need_rename;
- cdev = data;
+ cdev = container_of(work, struct ccw_device_private, kick_work)->cdev;
sch = to_subchannel(cdev->dev.parent);
if (cdev->private->dev_id.devno != sch->schib.pmcw.dev) {
/*
@@ -658,8 +657,7 @@ ccw_device_do_unreg_rereg(void *data)
if (need_rename)
snprintf (cdev->dev.bus_id, BUS_ID_SIZE, "0.%x.%04x",
sch->schid.ssid, sch->schib.pmcw.dev);
- PREPARE_WORK(&cdev->private->kick_work,
- ccw_device_add_changed, cdev);
+ PREPARE_WORK(&cdev->private->kick_work, ccw_device_add_changed);
queue_work(ccw_device_work, &cdev->private->kick_work);
}
@@ -677,14 +675,14 @@ ccw_device_release(struct device *dev)
* Register recognized device.
*/
static void
-io_subchannel_register(void *data)
+io_subchannel_register(struct work_struct *work)
{
struct ccw_device *cdev;
struct subchannel *sch;
int ret;
unsigned long flags;
- cdev = data;
+ cdev = container_of(work, struct ccw_device_private, kick_work)->cdev;
sch = to_subchannel(cdev->dev.parent);
/*
@@ -734,11 +732,12 @@ out:
}
void
-ccw_device_call_sch_unregister(void *data)
+ccw_device_call_sch_unregister(struct work_struct *work)
{
- struct ccw_device *cdev = data;
+ struct ccw_device *cdev;
struct subchannel *sch;
+ cdev = container_of(work, struct ccw_device_private, kick_work)->cdev;
sch = to_subchannel(cdev->dev.parent);
css_sch_device_unregister(sch);
/* Reset intparm to zeroes. */
@@ -768,7 +767,7 @@ io_subchannel_recog_done(struct ccw_devi
break;
sch = to_subchannel(cdev->dev.parent);
PREPARE_WORK(&cdev->private->kick_work,
- ccw_device_call_sch_unregister, cdev);
+ ccw_device_call_sch_unregister);
queue_work(slow_path_wq, &cdev->private->kick_work);
if (atomic_dec_and_test(&ccw_device_init_count))
wake_up(&ccw_device_init_wq);
@@ -783,7 +782,7 @@ io_subchannel_recog_done(struct ccw_devi
if (!get_device(&cdev->dev))
break;
PREPARE_WORK(&cdev->private->kick_work,
- io_subchannel_register, cdev);
+ io_subchannel_register);
queue_work(slow_path_wq, &cdev->private->kick_work);
break;
}
@@ -868,6 +867,7 @@ io_subchannel_probe (struct subchannel *
atomic_set(&cdev->private->onoff, 0);
cdev->dev.parent = &sch->dev;
cdev->dev.release = ccw_device_release;
+ cdev->private->cdev = cdev;
INIT_LIST_HEAD(&cdev->private->kick_work.entry);
/* Do first half of device_register. */
device_initialize(&cdev->dev);
@@ -891,11 +891,11 @@ io_subchannel_probe (struct subchannel *
}
static void
-ccw_device_unregister(void *data)
+ccw_device_unregister(struct work_struct *work)
{
struct ccw_device *cdev;
- cdev = (struct ccw_device *)data;
+ cdev = container_of(work, struct ccw_device_private, kick_work)->cdev;
if (test_and_clear_bit(1, &cdev->private->registered))
device_unregister(&cdev->dev);
put_device(&cdev->dev);
@@ -920,8 +920,7 @@ io_subchannel_remove (struct subchannel
* semaphore.
*/
if (get_device(&cdev->dev)) {
- PREPARE_WORK(&cdev->private->kick_work,
- ccw_device_unregister, cdev);
+ PREPARE_WORK(&cdev->private->kick_work, ccw_device_unregister);
queue_work(ccw_device_work, &cdev->private->kick_work);
}
return 0;
diff --git a/drivers/s390/cio/device.h b/drivers/s390/cio/device.h
index 9233b5c..d5fe95e 100644
--- a/drivers/s390/cio/device.h
+++ b/drivers/s390/cio/device.h
@@ -78,8 +78,8 @@ void io_subchannel_recog_done(struct ccw
int ccw_device_cancel_halt_clear(struct ccw_device *);
-void ccw_device_do_unreg_rereg(void *);
-void ccw_device_call_sch_unregister(void *);
+void ccw_device_do_unreg_rereg(struct work_struct *);
+void ccw_device_call_sch_unregister(struct work_struct *);
int ccw_device_recognition(struct ccw_device *);
int ccw_device_online(struct ccw_device *);
diff --git a/drivers/s390/cio/device_fsm.c b/drivers/s390/cio/device_fsm.c
index 09c7672..b9f6ae6 100644
--- a/drivers/s390/cio/device_fsm.c
+++ b/drivers/s390/cio/device_fsm.c
@@ -194,7 +194,7 @@ ccw_device_handle_oper(struct ccw_device
cdev->id.dev_model != cdev->private->senseid.dev_model ||
cdev->private->dev_id.devno != sch->schib.pmcw.dev) {
PREPARE_WORK(&cdev->private->kick_work,
- ccw_device_do_unreg_rereg, cdev);
+ ccw_device_do_unreg_rereg);
queue_work(ccw_device_work, &cdev->private->kick_work);
return 0;
}
@@ -329,19 +329,19 @@ ccw_device_sense_id_done(struct ccw_devi
}
static void
-ccw_device_oper_notify(void *data)
+ccw_device_oper_notify(struct work_struct *work)
{
struct ccw_device *cdev;
struct subchannel *sch;
int ret;
- cdev = data;
+ cdev = container_of(work, struct ccw_device_private, kick_work)->cdev;
sch = to_subchannel(cdev->dev.parent);
ret = (sch->driver && sch->driver->notify) ?
sch->driver->notify(&sch->dev, CIO_OPER) : 0;
if (!ret)
/* Driver doesn't want device back. */
- ccw_device_do_unreg_rereg(cdev);
+ ccw_device_do_unreg_rereg(&cdev->private->kick_work);
else {
/* Reenable channel measurements, if needed. */
cmf_reenable(cdev);
@@ -377,8 +377,7 @@ ccw_device_done(struct ccw_device *cdev,
if (cdev->private->flags.donotify) {
cdev->private->flags.donotify = 0;
- PREPARE_WORK(&cdev->private->kick_work, ccw_device_oper_notify,
- cdev);
+ PREPARE_WORK(&cdev->private->kick_work, ccw_device_oper_notify);
queue_work(ccw_device_notify_work, &cdev->private->kick_work);
}
wake_up(&cdev->private->wait_q);
@@ -528,13 +527,13 @@ ccw_device_recog_timeout(struct ccw_devi
static void
-ccw_device_nopath_notify(void *data)
+ccw_device_nopath_notify(struct work_struct *work)
{
struct ccw_device *cdev;
struct subchannel *sch;
int ret;
- cdev = data;
+ cdev = container_of(work, struct ccw_device_private, kick_work)->cdev;
sch = to_subchannel(cdev->dev.parent);
/* Extra sanity. */
if (sch->lpm)
@@ -547,8 +546,7 @@ ccw_device_nopath_notify(void *data)
cio_disable_subchannel(sch);
if (get_device(&cdev->dev)) {
PREPARE_WORK(&cdev->private->kick_work,
- ccw_device_call_sch_unregister,
- cdev);
+ ccw_device_call_sch_unregister);
queue_work(ccw_device_work,
&cdev->private->kick_work);
} else
@@ -607,7 +605,7 @@ ccw_device_verify_done(struct ccw_device
/* Reset oper notify indication after verify error. */
cdev->private->flags.donotify = 0;
PREPARE_WORK(&cdev->private->kick_work,
- ccw_device_nopath_notify, cdev);
+ ccw_device_nopath_notify);
queue_work(ccw_device_notify_work, &cdev->private->kick_work);
ccw_device_done(cdev, DEV_STATE_NOT_OPER);
break;
@@ -738,7 +736,7 @@ ccw_device_offline_notoper(struct ccw_de
sch = to_subchannel(cdev->dev.parent);
if (get_device(&cdev->dev)) {
PREPARE_WORK(&cdev->private->kick_work,
- ccw_device_call_sch_unregister, cdev);
+ ccw_device_call_sch_unregister);
queue_work(ccw_device_work, &cdev->private->kick_work);
}
wake_up(&cdev->private->wait_q);
@@ -769,7 +767,7 @@ ccw_device_online_notoper(struct ccw_dev
}
if (get_device(&cdev->dev)) {
PREPARE_WORK(&cdev->private->kick_work,
- ccw_device_call_sch_unregister, cdev);
+ ccw_device_call_sch_unregister);
queue_work(ccw_device_work, &cdev->private->kick_work);
}
wake_up(&cdev->private->wait_q);
@@ -874,7 +872,7 @@ ccw_device_online_timeout(struct ccw_dev
sch = to_subchannel(cdev->dev.parent);
if (!sch->lpm) {
PREPARE_WORK(&cdev->private->kick_work,
- ccw_device_nopath_notify, cdev);
+ ccw_device_nopath_notify);
queue_work(ccw_device_notify_work,
&cdev->private->kick_work);
} else
@@ -969,7 +967,7 @@ ccw_device_killing_irq(struct ccw_device
ERR_PTR(-EIO));
if (!sch->lpm) {
PREPARE_WORK(&cdev->private->kick_work,
- ccw_device_nopath_notify, cdev);
+ ccw_device_nopath_notify);
queue_work(ccw_device_notify_work, &cdev->private->kick_work);
} else if (cdev->private->flags.doverify)
/* Start delayed path verification. */
@@ -992,7 +990,7 @@ ccw_device_killing_timeout(struct ccw_de
sch = to_subchannel(cdev->dev.parent);
if (!sch->lpm) {
PREPARE_WORK(&cdev->private->kick_work,
- ccw_device_nopath_notify, cdev);
+ ccw_device_nopath_notify);
queue_work(ccw_device_notify_work,
&cdev->private->kick_work);
} else
@@ -1021,7 +1019,7 @@ void device_kill_io(struct subchannel *s
if (ret == -ENODEV) {
if (!sch->lpm) {
PREPARE_WORK(&cdev->private->kick_work,
- ccw_device_nopath_notify, cdev);
+ ccw_device_nopath_notify);
queue_work(ccw_device_notify_work,
&cdev->private->kick_work);
} else
@@ -1033,7 +1031,7 @@ void device_kill_io(struct subchannel *s
ERR_PTR(-EIO));
if (!sch->lpm) {
PREPARE_WORK(&cdev->private->kick_work,
- ccw_device_nopath_notify, cdev);
+ ccw_device_nopath_notify);
queue_work(ccw_device_notify_work, &cdev->private->kick_work);
} else
/* Start delayed path verification. */
diff --git a/drivers/s390/cio/qdio.c b/drivers/s390/cio/qdio.c
index 8d5fa1b..cf07755 100644
--- a/drivers/s390/cio/qdio.c
+++ b/drivers/s390/cio/qdio.c
@@ -2045,11 +2045,11 @@ omit_handler_call:
}
static void
-qdio_call_shutdown(void *data)
+qdio_call_shutdown(struct work_struct *work)
{
struct ccw_device *cdev;
- cdev = (struct ccw_device *)data;
+ cdev = container_of(work, struct ccw_device_private, kick_work)->cdev;
qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
put_device(&cdev->dev);
}
@@ -2091,7 +2091,7 @@ qdio_timeout_handler(struct ccw_device *
if (get_device(&cdev->dev)) {
/* Can't call shutdown from interrupt context. */
PREPARE_WORK(&cdev->private->kick_work,
- qdio_call_shutdown, (void *)cdev);
+ qdio_call_shutdown);
queue_work(ccw_device_work, &cdev->private->kick_work);
}
break;
-
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