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alistair23-linux
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Merge branch 'for-linus' of git://git.kernel.dk/linux-block 

Pull block fixes from Jens Axboe:
 "Been sitting on this for a while, but lets get this out the door.
  This fixes various important bugs for 3.3 final, along with a few more
  trivial ones.  Please pull!"

* 'for-linus' of git://git.kernel.dk/linux-block:
  block: fix ioc leak in put_io_context
  block, sx8: fix pointer math issue getting fw version
  Block: use a freezable workqueue for disk-event polling
  drivers/block/DAC960: fix -Wuninitialized warning
  drivers/block/DAC960: fix DAC960_V2_IOCTL_Opcode_T -Wenum-compare warning
  block: fix __blkdev_get and add_disk race condition
  block: Fix setting bio flags in drivers (sd_dif/floppy)
  block: Fix NULL pointer dereference in sd_revalidate_disk
  block: exit_io_context() should call elevator_exit_icq_fn()
  block: simplify ioc_release_fn()
  block: replace icq->changed with icq->flags
hifive-unleashed-5.1
Linus Torvalds 2012-03-14 17:16:45 -07:00
parent ff398c45b0 ff8c1474cc
commit f1cbd03f5e
11 changed files with 198 additions and 95 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

133
block/blk-ioc.c
View File

@ -36,10 +36,22 @@ static void icq_free_icq_rcu(struct rcu_head *head)
kmem_cache_free(icq->__rcu_icq_cache, icq);
}
/*
* Exit and free an icq. Called with both ioc and q locked.
*/
/* Exit an icq. Called with both ioc and q locked. */
static void ioc_exit_icq(struct io_cq *icq)
{
struct elevator_type *et = icq->q->elevator->type;
if (icq->flags & ICQ_EXITED)
return;
if (et->ops.elevator_exit_icq_fn)
et->ops.elevator_exit_icq_fn(icq);
icq->flags |= ICQ_EXITED;
}
/* Release an icq. Called with both ioc and q locked. */
static void ioc_destroy_icq(struct io_cq *icq)
{
struct io_context *ioc = icq->ioc;
struct request_queue *q = icq->q;
@ -60,8 +72,7 @@ static void ioc_exit_icq(struct io_cq *icq)
if (rcu_dereference_raw(ioc->icq_hint) == icq)
rcu_assign_pointer(ioc->icq_hint, NULL);
if (et->ops.elevator_exit_icq_fn)
et->ops.elevator_exit_icq_fn(icq);
ioc_exit_icq(icq);
/*
* @icq->q might have gone away by the time RCU callback runs
@ -79,7 +90,6 @@ static void ioc_release_fn(struct work_struct *work)
{
struct io_context *ioc = container_of(work, struct io_context,
release_work);
struct request_queue *last_q = NULL;
unsigned long flags;
/*
@ -93,44 +103,19 @@ static void ioc_release_fn(struct work_struct *work)
while (!hlist_empty(&ioc->icq_list)) {
struct io_cq *icq = hlist_entry(ioc->icq_list.first,
struct io_cq, ioc_node);
struct request_queue *this_q = icq->q;
struct request_queue *q = icq->q;
if (this_q != last_q) {
/*
* Need to switch to @this_q. Once we release
* @ioc->lock, it can go away along with @cic.
* Hold on to it.
*/
__blk_get_queue(this_q);
/*
* blk_put_queue() might sleep thanks to kobject
* idiocy. Always release both locks, put and
* restart.
*/
if (last_q) {
spin_unlock(last_q->queue_lock);
spin_unlock_irqrestore(&ioc->lock, flags);
blk_put_queue(last_q);
} else {
spin_unlock_irqrestore(&ioc->lock, flags);
}
last_q = this_q;
spin_lock_irqsave(this_q->queue_lock, flags);
spin_lock_nested(&ioc->lock, 1);
continue;
if (spin_trylock(q->queue_lock)) {
ioc_destroy_icq(icq);
spin_unlock(q->queue_lock);
} else {
spin_unlock_irqrestore(&ioc->lock, flags);
cpu_relax();
spin_lock_irqsave_nested(&ioc->lock, flags, 1);
}
ioc_exit_icq(icq);
}
if (last_q) {
spin_unlock(last_q->queue_lock);
spin_unlock_irqrestore(&ioc->lock, flags);
blk_put_queue(last_q);
} else {
spin_unlock_irqrestore(&ioc->lock, flags);
}
spin_unlock_irqrestore(&ioc->lock, flags);
kmem_cache_free(iocontext_cachep, ioc);
}
@ -145,6 +130,7 @@ static void ioc_release_fn(struct work_struct *work)
void put_io_context(struct io_context *ioc)
{
unsigned long flags;
bool free_ioc = false;
if (ioc == NULL)
return;
@ -159,8 +145,13 @@ void put_io_context(struct io_context *ioc)
spin_lock_irqsave(&ioc->lock, flags);
if (!hlist_empty(&ioc->icq_list))
schedule_work(&ioc->release_work);
else
free_ioc = true;
spin_unlock_irqrestore(&ioc->lock, flags);
}
if (free_ioc)
kmem_cache_free(iocontext_cachep, ioc);
}
EXPORT_SYMBOL(put_io_context);
@ -168,13 +159,41 @@ EXPORT_SYMBOL(put_io_context);
void exit_io_context(struct task_struct *task)
{
struct io_context *ioc;
struct io_cq *icq;
struct hlist_node *n;
unsigned long flags;
task_lock(task);
ioc = task->io_context;
task->io_context = NULL;
task_unlock(task);
atomic_dec(&ioc->nr_tasks);
if (!atomic_dec_and_test(&ioc->nr_tasks)) {
put_io_context(ioc);
return;
}
/*
* Need ioc lock to walk icq_list and q lock to exit icq. Perform
* reverse double locking. Read comment in ioc_release_fn() for
* explanation on the nested locking annotation.
*/
retry:
spin_lock_irqsave_nested(&ioc->lock, flags, 1);
hlist_for_each_entry(icq, n, &ioc->icq_list, ioc_node) {
if (icq->flags & ICQ_EXITED)
continue;
if (spin_trylock(icq->q->queue_lock)) {
ioc_exit_icq(icq);
spin_unlock(icq->q->queue_lock);
} else {
spin_unlock_irqrestore(&ioc->lock, flags);
cpu_relax();
goto retry;
}
}
spin_unlock_irqrestore(&ioc->lock, flags);
put_io_context(ioc);
}
@ -194,7 +213,7 @@ void ioc_clear_queue(struct request_queue *q)
struct io_context *ioc = icq->ioc;
spin_lock(&ioc->lock);
ioc_exit_icq(icq);
ioc_destroy_icq(icq);
spin_unlock(&ioc->lock);
}
}
@ -363,13 +382,13 @@ struct io_cq *ioc_create_icq(struct request_queue *q, gfp_t gfp_mask)
return icq;
}
void ioc_set_changed(struct io_context *ioc, int which)
void ioc_set_icq_flags(struct io_context *ioc, unsigned int flags)
{
struct io_cq *icq;
struct hlist_node *n;
hlist_for_each_entry(icq, n, &ioc->icq_list, ioc_node)
set_bit(which, &icq->changed);
icq->flags |= flags;
}
/**
@ -387,7 +406,7 @@ void ioc_ioprio_changed(struct io_context *ioc, int ioprio)
spin_lock_irqsave(&ioc->lock, flags);
ioc->ioprio = ioprio;
ioc_set_changed(ioc, ICQ_IOPRIO_CHANGED);
ioc_set_icq_flags(ioc, ICQ_IOPRIO_CHANGED);
spin_unlock_irqrestore(&ioc->lock, flags);
}
@ -404,11 +423,33 @@ void ioc_cgroup_changed(struct io_context *ioc)
unsigned long flags;
spin_lock_irqsave(&ioc->lock, flags);
ioc_set_changed(ioc, ICQ_CGROUP_CHANGED);
ioc_set_icq_flags(ioc, ICQ_CGROUP_CHANGED);
spin_unlock_irqrestore(&ioc->lock, flags);
}
EXPORT_SYMBOL(ioc_cgroup_changed);
/**
* icq_get_changed - fetch and clear icq changed mask
* @icq: icq of interest
*
* Fetch and clear ICQ_*_CHANGED bits from @icq. Grabs and releases
* @icq->ioc->lock.
*/
unsigned icq_get_changed(struct io_cq *icq)
{
unsigned int changed = 0;
unsigned long flags;
if (unlikely(icq->flags & ICQ_CHANGED_MASK)) {
spin_lock_irqsave(&icq->ioc->lock, flags);
changed = icq->flags & ICQ_CHANGED_MASK;
icq->flags &= ~ICQ_CHANGED_MASK;
spin_unlock_irqrestore(&icq->ioc->lock, flags);
}
return changed;
}
EXPORT_SYMBOL(icq_get_changed);
static int __init blk_ioc_init(void)
{
iocontext_cachep = kmem_cache_create("blkdev_ioc",

12
block/cfq-iosched.c
View File

@ -3470,20 +3470,20 @@ cfq_set_request(struct request_queue *q, struct request *rq, gfp_t gfp_mask)
const int rw = rq_data_dir(rq);
const bool is_sync = rq_is_sync(rq);
struct cfq_queue *cfqq;
unsigned int changed;
might_sleep_if(gfp_mask & __GFP_WAIT);
spin_lock_irq(q->queue_lock);
/* handle changed notifications */
if (unlikely(cic->icq.changed)) {
if (test_and_clear_bit(ICQ_IOPRIO_CHANGED, &cic->icq.changed))
changed_ioprio(cic);
changed = icq_get_changed(&cic->icq);
if (unlikely(changed & ICQ_IOPRIO_CHANGED))
changed_ioprio(cic);
#ifdef CONFIG_CFQ_GROUP_IOSCHED
if (test_and_clear_bit(ICQ_CGROUP_CHANGED, &cic->icq.changed))
changed_cgroup(cic);
if (unlikely(changed & ICQ_CGROUP_CHANGED))
changed_cgroup(cic);
#endif
}
new_queue:
cfqq = cic_to_cfqq(cic, is_sync);

42
block/genhd.c
View File

@ -35,6 +35,7 @@ static DEFINE_IDR(ext_devt_idr);
static struct device_type disk_type;
static void disk_alloc_events(struct gendisk *disk);
static void disk_add_events(struct gendisk *disk);
static void disk_del_events(struct gendisk *disk);
static void disk_release_events(struct gendisk *disk);
@ -601,6 +602,8 @@ void add_disk(struct gendisk *disk)
disk->major = MAJOR(devt);
disk->first_minor = MINOR(devt);
disk_alloc_events(disk);
/* Register BDI before referencing it from bdev */
bdi = &disk->queue->backing_dev_info;
bdi_register_dev(bdi, disk_devt(disk));
@ -1475,9 +1478,9 @@ static void __disk_unblock_events(struct gendisk *disk, bool check_now)
intv = disk_events_poll_jiffies(disk);
set_timer_slack(&ev->dwork.timer, intv / 4);
if (check_now)
queue_delayed_work(system_nrt_wq, &ev->dwork, 0);
queue_delayed_work(system_nrt_freezable_wq, &ev->dwork, 0);
else if (intv)
queue_delayed_work(system_nrt_wq, &ev->dwork, intv);
queue_delayed_work(system_nrt_freezable_wq, &ev->dwork, intv);
out_unlock:
spin_unlock_irqrestore(&ev->lock, flags);
}
@ -1521,7 +1524,7 @@ void disk_flush_events(struct gendisk *disk, unsigned int mask)
ev->clearing |= mask;
if (!ev->block) {
cancel_delayed_work(&ev->dwork);
queue_delayed_work(system_nrt_wq, &ev->dwork, 0);
queue_delayed_work(system_nrt_freezable_wq, &ev->dwork, 0);
}
spin_unlock_irq(&ev->lock);
}
@ -1558,7 +1561,7 @@ unsigned int disk_clear_events(struct gendisk *disk, unsigned int mask)
/* uncondtionally schedule event check and wait for it to finish */
disk_block_events(disk);
queue_delayed_work(system_nrt_wq, &ev->dwork, 0);
queue_delayed_work(system_nrt_freezable_wq, &ev->dwork, 0);
flush_delayed_work(&ev->dwork);
__disk_unblock_events(disk, false);
@ -1595,7 +1598,7 @@ static void disk_events_workfn(struct work_struct *work)
intv = disk_events_poll_jiffies(disk);
if (!ev->block && intv)
queue_delayed_work(system_nrt_wq, &ev->dwork, intv);
queue_delayed_work(system_nrt_freezable_wq, &ev->dwork, intv);
spin_unlock_irq(&ev->lock);
@ -1733,9 +1736,9 @@ module_param_cb(events_dfl_poll_msecs, &disk_events_dfl_poll_msecs_param_ops,
&disk_events_dfl_poll_msecs, 0644);
/*
* disk_{add|del|release}_events - initialize and destroy disk_events.
* disk_{alloc|add|del|release}_events - initialize and destroy disk_events.
*/
static void disk_add_events(struct gendisk *disk)
static void disk_alloc_events(struct gendisk *disk)
{
struct disk_events *ev;
@ -1748,16 +1751,6 @@ static void disk_add_events(struct gendisk *disk)
return;
}
if (sysfs_create_files(&disk_to_dev(disk)->kobj,
disk_events_attrs) < 0) {
pr_warn("%s: failed to create sysfs files for events\n",
disk->disk_name);
kfree(ev);
return;
}
disk->ev = ev;
INIT_LIST_HEAD(&ev->node);
ev->disk = disk;
spin_lock_init(&ev->lock);
@ -1766,8 +1759,21 @@ static void disk_add_events(struct gendisk *disk)
ev->poll_msecs = -1;
INIT_DELAYED_WORK(&ev->dwork, disk_events_workfn);
disk->ev = ev;
}
static void disk_add_events(struct gendisk *disk)
{
if (!disk->ev)
return;
/* FIXME: error handling */
if (sysfs_create_files(&disk_to_dev(disk)->kobj, disk_events_attrs) < 0)
pr_warn("%s: failed to create sysfs files for events\n",
disk->disk_name);
mutex_lock(&disk_events_mutex);
list_add_tail(&ev->node, &disk_events);
list_add_tail(&disk->ev->node, &disk_events);
mutex_unlock(&disk_events_mutex);
/*

48
block/partition-generic.c
View File

@ -389,17 +389,11 @@ static bool disk_unlock_native_capacity(struct gendisk *disk)
}
}
int rescan_partitions(struct gendisk *disk, struct block_device *bdev)
static int drop_partitions(struct gendisk *disk, struct block_device *bdev)
{
struct parsed_partitions *state = NULL;
struct disk_part_iter piter;
struct hd_struct *part;
int p, highest, res;
rescan:
if (state && !IS_ERR(state)) {
kfree(state);
state = NULL;
}
int res;
if (bdev->bd_part_count)
return -EBUSY;
@ -412,6 +406,24 @@ rescan:
delete_partition(disk, part->partno);
disk_part_iter_exit(&piter);
return 0;
}
int rescan_partitions(struct gendisk *disk, struct block_device *bdev)
{
struct parsed_partitions *state = NULL;
struct hd_struct *part;
int p, highest, res;
rescan:
if (state && !IS_ERR(state)) {
kfree(state);
state = NULL;
}
res = drop_partitions(disk, bdev);
if (res)
return res;
if (disk->fops->revalidate_disk)
disk->fops->revalidate_disk(disk);
check_disk_size_change(disk, bdev);
@ -515,6 +527,26 @@ rescan:
return 0;
}
int invalidate_partitions(struct gendisk *disk, struct block_device *bdev)
{
int res;
if (!bdev->bd_invalidated)
return 0;
res = drop_partitions(disk, bdev);
if (res)
return res;
set_capacity(disk, 0);
check_disk_size_change(disk, bdev);
bdev->bd_invalidated = 0;
/* tell userspace that the media / partition table may have changed */
kobject_uevent(&disk_to_dev(disk)->kobj, KOBJ_CHANGE);
return 0;
}
unsigned char *read_dev_sector(struct block_device *bdev, sector_t n, Sector *p)
{
struct address_space *mapping = bdev->bd_inode->i_mapping;

18
drivers/block/DAC960.c
View File

@ -1177,7 +1177,8 @@ static bool DAC960_V1_EnableMemoryMailboxInterface(DAC960_Controller_T
int TimeoutCounter;
int i;
memset(&CommandMailbox, 0, sizeof(DAC960_V1_CommandMailbox_T));
if (pci_set_dma_mask(Controller->PCIDevice, DMA_BIT_MASK(32)))
return DAC960_Failure(Controller, "DMA mask out of range");
Controller->BounceBufferLimit = DMA_BIT_MASK(32);
@ -4627,7 +4628,8 @@ static void DAC960_V2_ProcessCompletedCommand(DAC960_Command_T *Command)
DAC960_Controller_T *Controller = Command->Controller;
DAC960_CommandType_T CommandType = Command->CommandType;
DAC960_V2_CommandMailbox_T *CommandMailbox = &Command->V2.CommandMailbox;
DAC960_V2_IOCTL_Opcode_T CommandOpcode = CommandMailbox->Common.IOCTL_Opcode;
DAC960_V2_IOCTL_Opcode_T IOCTLOpcode = CommandMailbox->Common.IOCTL_Opcode;
DAC960_V2_CommandOpcode_T CommandOpcode = CommandMailbox->SCSI_10.CommandOpcode;
DAC960_V2_CommandStatus_T CommandStatus = Command->V2.CommandStatus;
if (CommandType == DAC960_ReadCommand ||
@ -4699,7 +4701,7 @@ static void DAC960_V2_ProcessCompletedCommand(DAC960_Command_T *Command)
{
if (Controller->ShutdownMonitoringTimer)
return;
if (CommandOpcode == DAC960_V2_GetControllerInfo)
if (IOCTLOpcode == DAC960_V2_GetControllerInfo)
{
DAC960_V2_ControllerInfo_T *NewControllerInfo =
Controller->V2.NewControllerInformation;
@ -4719,14 +4721,14 @@ static void DAC960_V2_ProcessCompletedCommand(DAC960_Command_T *Command)
memcpy(ControllerInfo, NewControllerInfo,
sizeof(DAC960_V2_ControllerInfo_T));
}
else if (CommandOpcode == DAC960_V2_GetEvent)
else if (IOCTLOpcode == DAC960_V2_GetEvent)
{
if (CommandStatus == DAC960_V2_NormalCompletion) {
DAC960_V2_ReportEvent(Controller, Controller->V2.Event);
}
Controller->V2.NextEventSequenceNumber++;
}
else if (CommandOpcode == DAC960_V2_GetPhysicalDeviceInfoValid &&
else if (IOCTLOpcode == DAC960_V2_GetPhysicalDeviceInfoValid &&
CommandStatus == DAC960_V2_NormalCompletion)
{
DAC960_V2_PhysicalDeviceInfo_T *NewPhysicalDeviceInfo =
@ -4915,7 +4917,7 @@ static void DAC960_V2_ProcessCompletedCommand(DAC960_Command_T *Command)
NewPhysicalDeviceInfo->LogicalUnit++;
Controller->V2.PhysicalDeviceIndex++;
}
else if (CommandOpcode == DAC960_V2_GetPhysicalDeviceInfoValid)
else if (IOCTLOpcode == DAC960_V2_GetPhysicalDeviceInfoValid)
{
unsigned int DeviceIndex;
for (DeviceIndex = Controller->V2.PhysicalDeviceIndex;
@ -4938,7 +4940,7 @@ static void DAC960_V2_ProcessCompletedCommand(DAC960_Command_T *Command)
}
Controller->V2.NeedPhysicalDeviceInformation = false;
}
else if (CommandOpcode == DAC960_V2_GetLogicalDeviceInfoValid &&
else if (IOCTLOpcode == DAC960_V2_GetLogicalDeviceInfoValid &&
CommandStatus == DAC960_V2_NormalCompletion)
{
DAC960_V2_LogicalDeviceInfo_T *NewLogicalDeviceInfo =
@ -5065,7 +5067,7 @@ static void DAC960_V2_ProcessCompletedCommand(DAC960_Command_T *Command)
[LogicalDeviceNumber] = true;
NewLogicalDeviceInfo->LogicalDeviceNumber++;
}
else if (CommandOpcode == DAC960_V2_GetLogicalDeviceInfoValid)
else if (IOCTLOpcode == DAC960_V2_GetLogicalDeviceInfoValid)
{
int LogicalDriveNumber;
for (LogicalDriveNumber = 0;

2
drivers/block/sx8.c
View File

@ -1120,7 +1120,7 @@ static inline void carm_handle_resp(struct carm_host *host,
break;
case MISC_GET_FW_VER: {
struct carm_fw_ver *ver = (struct carm_fw_ver *)
mem + sizeof(struct carm_msg_get_fw_ver);
(mem + sizeof(struct carm_msg_get_fw_ver));
if (!error) {
host->fw_ver = le32_to_cpu(ver->version);
host->flags |= (ver->features & FL_FW_VER_MASK);

16
fs/block_dev.c
View File

@ -1183,8 +1183,12 @@ static int __blkdev_get(struct block_device *bdev, fmode_t mode, int for_part)
* The latter is necessary to prevent ghost
* partitions on a removed medium.
*/
if (bdev->bd_invalidated && (!ret || ret == -ENOMEDIUM))
rescan_partitions(disk, bdev);
if (bdev->bd_invalidated) {
if (!ret)
rescan_partitions(disk, bdev);
else if (ret == -ENOMEDIUM)
invalidate_partitions(disk, bdev);
}
if (ret)
goto out_clear;
} else {
@ -1214,8 +1218,12 @@ static int __blkdev_get(struct block_device *bdev, fmode_t mode, int for_part)
if (bdev->bd_disk->fops->open)
ret = bdev->bd_disk->fops->open(bdev, mode);
/* the same as first opener case, read comment there */
if (bdev->bd_invalidated && (!ret || ret == -ENOMEDIUM))
rescan_partitions(bdev->bd_disk, bdev);
if (bdev->bd_invalidated) {
if (!ret)
rescan_partitions(bdev->bd_disk, bdev);
else if (ret == -ENOMEDIUM)
invalidate_partitions(bdev->bd_disk, bdev);
}
if (ret)
goto out_unlock_bdev;
}

1
include/linux/genhd.h
View File

@ -596,6 +596,7 @@ extern char *disk_name (struct gendisk *hd, int partno, char *buf);
extern int disk_expand_part_tbl(struct gendisk *disk, int target);
extern int rescan_partitions(struct gendisk *disk, struct block_device *bdev);
extern int invalidate_partitions(struct gendisk *disk, struct block_device *bdev);
extern struct hd_struct * __must_check add_partition(struct gendisk *disk,
int partno, sector_t start,
sector_t len, int flags,

10
include/linux/iocontext.h
View File

@ -6,8 +6,11 @@
#include <linux/workqueue.h>
enum {
ICQ_IOPRIO_CHANGED,
ICQ_CGROUP_CHANGED,
ICQ_IOPRIO_CHANGED = 1 << 0,
ICQ_CGROUP_CHANGED = 1 << 1,
ICQ_EXITED = 1 << 2,
ICQ_CHANGED_MASK = ICQ_IOPRIO_CHANGED | ICQ_CGROUP_CHANGED,
};
/*
@ -88,7 +91,7 @@ struct io_cq {
struct rcu_head __rcu_head;
};
unsigned long changed;
unsigned int flags;
};
/*
@ -139,6 +142,7 @@ struct io_context *get_task_io_context(struct task_struct *task,
gfp_t gfp_flags, int node);
void ioc_ioprio_changed(struct io_context *ioc, int ioprio);
void ioc_cgroup_changed(struct io_context *ioc);
unsigned int icq_get_changed(struct io_cq *icq);
#else
struct io_context;
static inline void put_io_context(struct io_context *ioc) { }

4
include/linux/workqueue.h
View File

@ -289,12 +289,16 @@ enum {
*
* system_freezable_wq is equivalent to system_wq except that it's
* freezable.
*
* system_nrt_freezable_wq is equivalent to system_nrt_wq except that
* it's freezable.
*/
extern struct workqueue_struct *system_wq;
extern struct workqueue_struct *system_long_wq;
extern struct workqueue_struct *system_nrt_wq;
extern struct workqueue_struct *system_unbound_wq;
extern struct workqueue_struct *system_freezable_wq;
extern struct workqueue_struct *system_nrt_freezable_wq;
extern struct workqueue_struct *
__alloc_workqueue_key(const char *fmt, unsigned int flags, int max_active,

7
kernel/workqueue.c
View File

@ -253,11 +253,13 @@ struct workqueue_struct *system_long_wq __read_mostly;
struct workqueue_struct *system_nrt_wq __read_mostly;
struct workqueue_struct *system_unbound_wq __read_mostly;
struct workqueue_struct *system_freezable_wq __read_mostly;
struct workqueue_struct *system_nrt_freezable_wq __read_mostly;
EXPORT_SYMBOL_GPL(system_wq);
EXPORT_SYMBOL_GPL(system_long_wq);
EXPORT_SYMBOL_GPL(system_nrt_wq);
EXPORT_SYMBOL_GPL(system_unbound_wq);
EXPORT_SYMBOL_GPL(system_freezable_wq);
EXPORT_SYMBOL_GPL(system_nrt_freezable_wq);
#define CREATE_TRACE_POINTS
#include <trace/events/workqueue.h>
@ -3833,8 +3835,11 @@ static int __init init_workqueues(void)
WQ_UNBOUND_MAX_ACTIVE);
system_freezable_wq = alloc_workqueue("events_freezable",
WQ_FREEZABLE, 0);
system_nrt_freezable_wq = alloc_workqueue("events_nrt_freezable",
WQ_NON_REENTRANT | WQ_FREEZABLE, 0);
BUG_ON(!system_wq || !system_long_wq || !system_nrt_wq ||
!system_unbound_wq || !system_freezable_wq);
!system_unbound_wq || !system_freezable_wq ||
!system_nrt_freezable_wq);
return 0;
}
early_initcall(init_workqueues);