JFS: Use the kthread_ API

Use the kthread_ API instead of opencoding lots of hairy code for kernel
thread creation and teardown.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com>

1 files changed, 6 insertions, 14 deletions

diff --git a/fs/jfs/jfs_logmgr.c b/fs/jfs/jfs_logmgr.c
index 06bded6c12b9..3113ff53bd55 100644
--- a/fs/jfs/jfs_logmgr.c
+++ b/fs/jfs/jfs_logmgr.c
@@ -64,6 +64,7 @@
 #include <linux/interrupt.h>
 #include <linux/smp_lock.h>
 #include <linux/completion.h>
+#include <linux/kthread.h>
 #include <linux/buffer_head.h>          /* for sync_blockdev() */
 #include <linux/bio.h>
 #include <linux/suspend.h>
@@ -81,7 +82,6 @@
  */
 static struct lbuf *log_redrive_list;
 static DEFINE_SPINLOCK(log_redrive_lock);
-DECLARE_WAIT_QUEUE_HEAD(jfs_IO_thread_wait);
 
 
 /*
@@ -1980,7 +1980,7 @@ static inline void lbmRedrive(struct lbuf *bp)
         log_redrive_list = bp;
         spin_unlock_irqrestore(&log_redrive_lock, flags);
 
-        wake_up(&jfs_IO_thread_wait);
+        wake_up_process(jfsIOthread);
 }
 
 
@@ -2347,13 +2347,7 @@ int jfsIOWait(void *arg)
 {
         struct lbuf *bp;
 
-        daemonize("jfsIO");
-
-        complete(&jfsIOwait);
-
         do {
-                DECLARE_WAITQUEUE(wq, current);
-
                 spin_lock_irq(&log_redrive_lock);
                 while ((bp = log_redrive_list) != 0) {
                         log_redrive_list = bp->l_redrive_next;
@@ -2362,21 +2356,19 @@ int jfsIOWait(void *arg)
                         lbmStartIO(bp);
                         spin_lock_irq(&log_redrive_lock);
                 }
+                spin_unlock_irq(&log_redrive_lock);
+
                 if (freezing(current)) {
-                        spin_unlock_irq(&log_redrive_lock);
                         refrigerator();
                 } else {
-                        add_wait_queue(&jfs_IO_thread_wait, &wq);
                         set_current_state(TASK_INTERRUPTIBLE);
-                        spin_unlock_irq(&log_redrive_lock);
                         schedule();
                         current->state = TASK_RUNNING;
-                        remove_wait_queue(&jfs_IO_thread_wait, &wq);
                 }
-        } while (!jfs_stop_threads);
+        } while (!kthread_should_stop());
 
         jfs_info("jfsIOWait being killed!");
-        complete_and_exit(&jfsIOwait, 0);
+        return 0;
 }
 
 /*