[PATCH 1/2] md: make mddev lookup and ioctl helpers non-static

[Abd-Alrhman Masalkhi]

A following patch adds an md misc control device, so that arrays can
be managed without opening the md block device. Its code lives in a
separate file and needs to look up arrays and reuse existing ioctl
helpers.

Signed-off-by: Abd-Alrhman Masalkhi <abd.masalkhi@xxxxxxxxx>
---
 drivers/md/md.c | 10 +++++-----
 drivers/md/md.h |  5 +++++
 2 files changed, 10 insertions(+), 5 deletions(-)

diff --git a/drivers/md/md.c b/drivers/md/md.c
index 680b34a63cb3..b5027d65c6d8 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -364,8 +364,8 @@ EXPORT_SYMBOL_GPL(md_new_event);
  * Enables to iterate over all existing md arrays
  * all_mddevs_lock protects this list.
  */
-static LIST_HEAD(all_mddevs);
-static DEFINE_SPINLOCK(all_mddevs_lock);
+LIST_HEAD(all_mddevs);
+DEFINE_SPINLOCK(all_mddevs_lock);
 
 static bool is_md_suspended(struct mddev *mddev)
 {
@@ -623,7 +623,7 @@ bool md_flush_request(struct mddev *mddev, struct bio *bio)
 }
 EXPORT_SYMBOL(md_flush_request);
 
-static inline struct mddev *mddev_get(struct mddev *mddev)
+struct mddev *mddev_get(struct mddev *mddev)
 {
 	lockdep_assert_held(&all_mddevs_lock);
 
@@ -8101,7 +8101,7 @@ static void put_cluster_ops(struct mddev *mddev)
  * Any differences that cannot be handled will cause an error.
  * Normally, only one change can be managed at a time.
  */
-static int update_array_info(struct mddev *mddev, mdu_array_info_t *info)
+int update_array_info(struct mddev *mddev, mdu_array_info_t *info)
 {
 	int rv = 0;
 	int cnt = 0;
@@ -8227,7 +8227,7 @@ static int update_array_info(struct mddev *mddev, mdu_array_info_t *info)
 	return rv;
 }
 
-static int set_disk_faulty(struct mddev *mddev, dev_t dev)
+int set_disk_faulty(struct mddev *mddev, dev_t dev)
 {
 	struct md_rdev *rdev;
 	int err = 0;
diff --git a/drivers/md/md.h b/drivers/md/md.h
index b6d2e8929a0f..cb8760521764 100644
--- a/drivers/md/md.h
+++ b/drivers/md/md.h
@@ -953,6 +953,7 @@ extern int mddev_init(struct mddev *mddev);
 extern void mddev_destroy(struct mddev *mddev);
 void md_init_stacking_limits(struct queue_limits *lim);
 struct mddev *md_alloc(dev_t dev, char *name);
+extern struct mddev *mddev_get(struct mddev *mddev);
 void mddev_put(struct mddev *mddev);
 extern int md_run(struct mddev *mddev);
 extern int md_start(struct mddev *mddev);
@@ -974,6 +975,10 @@ extern void mddev_destroy_serial_pool(struct mddev *mddev,
 				      struct md_rdev *rdev);
 struct md_rdev *md_find_rdev_nr_rcu(struct mddev *mddev, int nr);
 struct md_rdev *md_find_rdev_rcu(struct mddev *mddev, dev_t dev);
+int update_array_info(struct mddev *mddev, mdu_array_info_t *info);
+
+extern struct list_head all_mddevs;
+extern spinlock_t all_mddevs_lock;
 
 static inline bool is_rdev_broken(struct md_rdev *rdev)
 {
-- 
2.43.0