#include <linux/mtd/mtd.h>
#include <linux/blkdev.h>
#include <linux/blkpg.h>
+#include <linux/freezer.h>
#include <linux/spinlock.h>
#include <linux/hdreg.h>
#include <linux/init.h>
#include <linux/mutex.h>
+#include <linux/kthread.h>
#include <asm/uaccess.h>
static LIST_HEAD(blktrans_majors);
extern struct mtd_info *mtd_table[];
struct mtd_blkcore_priv {
- struct completion thread_dead;
- int exiting;
- wait_queue_head_t thread_wq;
+ struct task_struct *thread;
struct request_queue *rq;
spinlock_t queue_lock;
};
struct request_queue *rq = tr->blkcore_priv->rq;
/* we might get involved when memory gets low, so use PF_MEMALLOC */
- current->flags |= PF_MEMALLOC | PF_NOFREEZE;
-
- daemonize("%sd", tr->name);
-
- /* daemonize() doesn't do this for us since some kernel threads
- actually want to deal with signals. We can't just call
- exit_sighand() since that'll cause an oops when we finally
- do exit. */
- spin_lock_irq(¤t->sighand->siglock);
- sigfillset(¤t->blocked);
- recalc_sigpending();
- spin_unlock_irq(¤t->sighand->siglock);
+ current->flags |= PF_MEMALLOC;
spin_lock_irq(rq->queue_lock);
-
- while (!tr->blkcore_priv->exiting) {
+ while (!kthread_should_stop()) {
struct request *req;
struct mtd_blktrans_dev *dev;
int res = 0;
- DECLARE_WAITQUEUE(wait, current);
req = elv_next_request(rq);
if (!req) {
- add_wait_queue(&tr->blkcore_priv->thread_wq, &wait);
set_current_state(TASK_INTERRUPTIBLE);
-
spin_unlock_irq(rq->queue_lock);
-
schedule();
- remove_wait_queue(&tr->blkcore_priv->thread_wq, &wait);
-
spin_lock_irq(rq->queue_lock);
-
continue;
}
}
spin_unlock_irq(rq->queue_lock);
- complete_and_exit(&tr->blkcore_priv->thread_dead, 0);
+ return 0;
}
static void mtd_blktrans_request(struct request_queue *rq)
{
struct mtd_blktrans_ops *tr = rq->queuedata;
- wake_up(&tr->blkcore_priv->thread_wq);
+ wake_up_process(tr->blkcore_priv->thread);
}
int last_devnum = -1;
struct gendisk *gd;
- if (!!mutex_trylock(&mtd_table_mutex)) {
+ if (mutex_trylock(&mtd_table_mutex)) {
mutex_unlock(&mtd_table_mutex);
BUG();
}
int del_mtd_blktrans_dev(struct mtd_blktrans_dev *old)
{
- if (!!mutex_trylock(&mtd_table_mutex)) {
+ if (mutex_trylock(&mtd_table_mutex)) {
mutex_unlock(&mtd_table_mutex);
BUG();
}
if (!blktrans_notifier.list.next)
register_mtd_user(&blktrans_notifier);
- tr->blkcore_priv = kmalloc(sizeof(*tr->blkcore_priv), GFP_KERNEL);
+ tr->blkcore_priv = kzalloc(sizeof(*tr->blkcore_priv), GFP_KERNEL);
if (!tr->blkcore_priv)
return -ENOMEM;
- memset(tr->blkcore_priv, 0, sizeof(*tr->blkcore_priv));
-
mutex_lock(&mtd_table_mutex);
ret = register_blkdev(tr->major, tr->name);
return ret;
}
spin_lock_init(&tr->blkcore_priv->queue_lock);
- init_completion(&tr->blkcore_priv->thread_dead);
- init_waitqueue_head(&tr->blkcore_priv->thread_wq);
tr->blkcore_priv->rq = blk_init_queue(mtd_blktrans_request, &tr->blkcore_priv->queue_lock);
if (!tr->blkcore_priv->rq) {
blk_queue_hardsect_size(tr->blkcore_priv->rq, tr->blksize);
tr->blkshift = ffs(tr->blksize) - 1;
- ret = kernel_thread(mtd_blktrans_thread, tr, CLONE_KERNEL);
- if (ret < 0) {
+ tr->blkcore_priv->thread = kthread_run(mtd_blktrans_thread, tr,
+ "%sd", tr->name);
+ if (IS_ERR(tr->blkcore_priv->thread)) {
blk_cleanup_queue(tr->blkcore_priv->rq);
unregister_blkdev(tr->major, tr->name);
kfree(tr->blkcore_priv);
mutex_unlock(&mtd_table_mutex);
- return ret;
+ return PTR_ERR(tr->blkcore_priv->thread);
}
INIT_LIST_HEAD(&tr->devs);
mutex_lock(&mtd_table_mutex);
/* Clean up the kernel thread */
- tr->blkcore_priv->exiting = 1;
- wake_up(&tr->blkcore_priv->thread_wq);
- wait_for_completion(&tr->blkcore_priv->thread_dead);
+ kthread_stop(tr->blkcore_priv->thread);
/* Remove it from the list of active majors */
list_del(&tr->list);