buffer: switch do_emergency_thaw() away from pdflush_operation()

This is (again) a preparatory patch similar to commit a2a9537. It open codes a simple async way of executing do_thaw_all() out of context, so we can get rid of pdflush. Signed-off-by: Jens Axboe <[email protected]>
opendata26 · Apr 15, 2009 · 053c525 · 053c525
1 parent 329007c
commit 053c525
Showing 1 changed file with 9 additions and 2 deletions.
diff --git a/fs/buffer.c b/fs/buffer.c
@@ -547,7 +547,7 @@ static int osync_buffers_list(spinlock_t *lock, struct list_head *list)
 	return err;
 }
 
-void do_thaw_all(unsigned long unused)
+void do_thaw_all(struct work_struct *work)
 {
 	struct super_block *sb;
 	char b[BDEVNAME_SIZE];
@@ -567,6 +567,7 @@ void do_thaw_all(unsigned long unused)
 			goto restart;
 	}
 	spin_unlock(&sb_lock);
+	kfree(work);
 	printk(KERN_WARNING "Emergency Thaw complete\n");
 }
 
@@ -577,7 +578,13 @@ void do_thaw_all(unsigned long unused)
  */
 void emergency_thaw_all(void)
 {
-	pdflush_operation(do_thaw_all, 0);
+	struct work_struct *work;
+
+	work = kmalloc(sizeof(*work), GFP_ATOMIC);
+	if (work) {
+		INIT_WORK(work, do_thaw_all);
+		schedule_work(work);
+	}
 }
 
 /**