md: Export and rename find_rdev_nr_rcu

This is required by the clustering module (patches to follow) to
find the device to remove or re-add.

Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com>
Signed-off-by: NeilBrown <neilb@suse.de>

2 files changed, 6 insertions, 4 deletions

diff --git a/drivers/md/md.c b/drivers/md/md.c
index bc1e43014292..d406a79f9140 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -642,7 +642,7 @@ void mddev_unlock(struct mddev *mddev)
 }
 EXPORT_SYMBOL_GPL(mddev_unlock);
 
-static struct md_rdev *find_rdev_nr_rcu(struct mddev *mddev, int nr)
+struct md_rdev *md_find_rdev_nr_rcu(struct mddev *mddev, int nr)
 {
         struct md_rdev *rdev;
 
@@ -652,6 +652,7 @@ static struct md_rdev *find_rdev_nr_rcu(struct mddev *mddev, int nr)
 
         return NULL;
 }
+EXPORT_SYMBOL_GPL(md_find_rdev_nr_rcu);
 
 static struct md_rdev *find_rdev(struct mddev *mddev, dev_t dev)
 {
@@ -2049,11 +2050,11 @@ static int bind_rdev_to_array(struct md_rdev *rdev, struct mddev *mddev)
                 int choice = 0;
                 if (mddev->pers)
                         choice = mddev->raid_disks;
-                while (find_rdev_nr_rcu(mddev, choice))
+                while (md_find_rdev_nr_rcu(mddev, choice))
                         choice++;
                 rdev->desc_nr = choice;
         } else {
-                if (find_rdev_nr_rcu(mddev, rdev->desc_nr)) {
+                if (md_find_rdev_nr_rcu(mddev, rdev->desc_nr)) {
                         rcu_read_unlock();
                         return -EBUSY;
                 }
@@ -5721,7 +5722,7 @@ static int get_disk_info(struct mddev *mddev, void __user * arg)
                 return -EFAULT;
 
         rcu_read_lock();
-        rdev = find_rdev_nr_rcu(mddev, info.number);
+        rdev = md_find_rdev_nr_rcu(mddev, info.number);
         if (rdev) {
                 info.major = MAJOR(rdev->bdev->bd_dev);
                 info.minor = MINOR(rdev->bdev->bd_dev);
diff --git a/drivers/md/md.h b/drivers/md/md.h
index d98c0d764d8f..ecdce36ec6b8 100644
--- a/drivers/md/md.h
+++ b/drivers/md/md.h
@@ -672,6 +672,7 @@ extern void md_unplug(struct blk_plug_cb *cb, bool from_schedule);
 extern void md_reload_sb(struct mddev *mddev);
 extern void md_update_sb(struct mddev *mddev, int force);
 extern void md_kick_rdev_from_array(struct md_rdev * rdev);
+struct md_rdev *md_find_rdev_nr_rcu(struct mddev *mddev, int nr);
 static inline int mddev_check_plugged(struct mddev *mddev)
 {
         return !!blk_check_plugged(md_unplug, mddev,