md: move mddev_lock and related to md.h

The one which is not inline (mddev_unlock) gets EXPORTed.

This makes the locking available to personality modules so that it
doesn't have to be imposed upon them.

Signed-off-by: NeilBrown <neilb@suse.de>

1 files changed, 2 insertions, 24 deletions

diff --git a/drivers/md/md.c b/drivers/md/md.c
index 0f00c1e2d829..ea839d811f64 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -590,32 +590,9 @@ static struct mddev *mddev_find(dev_t unit)
         goto retry;
 }
 
-static inline int __must_check mddev_lock(struct mddev *mddev)
-{
-        return mutex_lock_interruptible(&mddev->reconfig_mutex);
-}
-
-/* Sometimes we need to take the lock in a situation where
- * failure due to interrupts is not acceptable.
- */
-static inline void mddev_lock_nointr(struct mddev *mddev)
-{
-        mutex_lock(&mddev->reconfig_mutex);
-}
-
-static inline int mddev_is_locked(struct mddev *mddev)
-{
-        return mutex_is_locked(&mddev->reconfig_mutex);
-}
-
-static inline int mddev_trylock(struct mddev *mddev)
-{
-        return mutex_trylock(&mddev->reconfig_mutex);
-}
-
 static struct attribute_group md_redundancy_group;
 
-static void mddev_unlock(struct mddev *mddev)
+void mddev_unlock(struct mddev *mddev)
 {
         if (mddev->to_remove) {
                 /* These cannot be removed under reconfig_mutex as
@@ -657,6 +634,7 @@ static void mddev_unlock(struct mddev *mddev)
         md_wakeup_thread(mddev->thread);
         spin_unlock(&pers_lock);
 }
+EXPORT_SYMBOL_GPL(mddev_unlock);
 
 static struct md_rdev *find_rdev_nr_rcu(struct mddev *mddev, int nr)
 {