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Diffstat (limited to 'drivers/md/md.c')
-rw-r--r--drivers/md/md.c44
1 files changed, 25 insertions, 19 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c
index c7a006e102de..8aebcf2a30d2 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -515,6 +515,17 @@ void mddev_init(struct mddev *mddev)
}
EXPORT_SYMBOL_GPL(mddev_init);
+static struct mddev *mddev_find_locked(dev_t unit)
+{
+ struct mddev *mddev;
+
+ list_for_each_entry(mddev, &all_mddevs, all_mddevs)
+ if (mddev->unit == unit)
+ return mddev;
+
+ return NULL;
+}
+
static struct mddev *mddev_find(dev_t unit)
{
struct mddev *mddev, *new = NULL;
@@ -526,13 +537,13 @@ static struct mddev *mddev_find(dev_t unit)
spin_lock(&all_mddevs_lock);
if (unit) {
- list_for_each_entry(mddev, &all_mddevs, all_mddevs)
- if (mddev->unit == unit) {
- mddev_get(mddev);
- spin_unlock(&all_mddevs_lock);
- kfree(new);
- return mddev;
- }
+ mddev = mddev_find_locked(unit);
+ if (mddev) {
+ mddev_get(mddev);
+ spin_unlock(&all_mddevs_lock);
+ kfree(new);
+ return mddev;
+ }
if (new) {
list_add(&new->all_mddevs, &all_mddevs);
@@ -558,12 +569,7 @@ static struct mddev *mddev_find(dev_t unit)
return NULL;
}
- is_free = 1;
- list_for_each_entry(mddev, &all_mddevs, all_mddevs)
- if (mddev->unit == dev) {
- is_free = 0;
- break;
- }
+ is_free = !mddev_find_locked(dev);
}
new->unit = dev;
new->md_minor = MINOR(dev);
@@ -5094,7 +5100,7 @@ static struct kobject *md_probe(dev_t dev, int *part, void *data)
return NULL;
}
-static int add_named_array(const char *val, struct kernel_param *kp)
+static int add_named_array(const char *val, const struct kernel_param *kp)
{
/* val must be "md_*" where * is not all digits.
* We allocate an array with a large free minor number, and
@@ -7038,9 +7044,9 @@ static int md_open(struct block_device *bdev, fmode_t mode)
*/
mddev_put(mddev);
/* Wait until bdev->bd_disk is definitely gone */
- flush_workqueue(md_misc_wq);
- /* Then retry the open from the top */
- return -ERESTARTSYS;
+ if (work_pending(&mddev->del_work))
+ flush_workqueue(md_misc_wq);
+ return -EBUSY;
}
BUG_ON(mddev != bdev->bd_disk->private_data);
@@ -9324,11 +9330,11 @@ static __exit void md_exit(void)
subsys_initcall(md_init);
module_exit(md_exit)
-static int get_ro(char *buffer, struct kernel_param *kp)
+static int get_ro(char *buffer, const struct kernel_param *kp)
{
return sprintf(buffer, "%d", start_readonly);
}
-static int set_ro(const char *val, struct kernel_param *kp)
+static int set_ro(const char *val, const struct kernel_param *kp)
{
return kstrtouint(val, 10, (unsigned int *)&start_readonly);
}