[PATCH 20/78] md: use set_capacity_and_notify

[Christoph Hellwig <hch@xxxxxx>]

Use set_capacity_and_notify to set the size of both the disk and block
device.  This also gets the uevent notifications for the resize for free.

Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Acked-by: Song Liu <song@xxxxxxxxxx>
---
 drivers/md/md-cluster.c |  6 ++----
 drivers/md/md-linear.c  |  3 +--
 drivers/md/md.c         | 24 ++++++++++--------------
 3 files changed, 13 insertions(+), 20 deletions(-)

diff --git a/drivers/md/md-cluster.c b/drivers/md/md-cluster.c
index 4aaf4820b6f625..87442dc59f6ca3 100644
--- a/drivers/md/md-cluster.c
+++ b/drivers/md/md-cluster.c
@@ -581,8 +581,7 @@ static int process_recvd_msg(struct mddev *mddev, struct 
cluster_msg *msg)
                process_metadata_update(mddev, msg);
                break;
        case CHANGE_CAPACITY:
-               set_capacity(mddev->gendisk, mddev->array_sectors);
-               revalidate_disk_size(mddev->gendisk, true);
+               set_capacity_and_notify(mddev->gendisk, mddev->array_sectors);
                break;
        case RESYNCING:
                set_bit(MD_RESYNCING_REMOTE, &mddev->recovery);
@@ -1296,8 +1295,7 @@ static void update_size(struct mddev *mddev, sector_t 
old_dev_sectors)
                if (ret)
                        pr_err("%s:%d: failed to send CHANGE_CAPACITY msg\n",
                               __func__, __LINE__);
-               set_capacity(mddev->gendisk, mddev->array_sectors);
-               revalidate_disk_size(mddev->gendisk, true);
+               set_capacity_and_notify(mddev->gendisk, mddev->array_sectors);
        } else {
                /* revert to previous sectors */
                ret = mddev->pers->resize(mddev, old_dev_sectors);
diff --git a/drivers/md/md-linear.c b/drivers/md/md-linear.c
index 5ab22069b5be9c..98f1b4b2bdcef8 100644
--- a/drivers/md/md-linear.c
+++ b/drivers/md/md-linear.c
@@ -200,9 +200,8 @@ static int linear_add(struct mddev *mddev, struct md_rdev 
*rdev)
                "copied raid_disks doesn't match mddev->raid_disks");
        rcu_assign_pointer(mddev->private, newconf);
        md_set_array_sectors(mddev, linear_size(mddev, 0, 0));
-       set_capacity(mddev->gendisk, mddev->array_sectors);
+       set_capacity_and_notify(mddev->gendisk, mddev->array_sectors);
        mddev_resume(mddev);
-       revalidate_disk_size(mddev->gendisk, true);
        kfree_rcu(oldconf, rcu);
        return 0;
 }
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 98bac4f304ae26..32e375d50fee17 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -5355,10 +5355,9 @@ array_size_store(struct mddev *mddev, const char *buf, 
size_t len)
 
        if (!err) {
                mddev->array_sectors = sectors;
-               if (mddev->pers) {
-                       set_capacity(mddev->gendisk, mddev->array_sectors);
-                       revalidate_disk_size(mddev->gendisk, true);
-               }
+               if (mddev->pers)
+                       set_capacity_and_notify(mddev->gendisk,
+                                               mddev->array_sectors);
        }
        mddev_unlock(mddev);
        return err ?: len;
@@ -6107,8 +6106,7 @@ int do_md_run(struct mddev *mddev)
        md_wakeup_thread(mddev->thread);
        md_wakeup_thread(mddev->sync_thread); /* possibly kick off a reshape */
 
-       set_capacity(mddev->gendisk, mddev->array_sectors);
-       revalidate_disk_size(mddev->gendisk, true);
+       set_capacity_and_notify(mddev->gendisk, mddev->array_sectors);
        clear_bit(MD_NOT_READY, &mddev->flags);
        mddev->changed = 1;
        kobject_uevent(&disk_to_dev(mddev->gendisk)->kobj, KOBJ_CHANGE);
@@ -6423,10 +6421,9 @@ static int do_md_stop(struct mddev *mddev, int mode,
                        if (rdev->raid_disk >= 0)
                                sysfs_unlink_rdev(mddev, rdev);
 
-               set_capacity(disk, 0);
+               set_capacity_and_notify(disk, 0);
                mutex_unlock(&mddev->open_mutex);
                mddev->changed = 1;
-               revalidate_disk_size(disk, true);
 
                if (mddev->ro)
                        mddev->ro = 0;
@@ -7257,8 +7254,8 @@ static int update_size(struct mddev *mddev, sector_t 
num_sectors)
                if (mddev_is_clustered(mddev))
                        md_cluster_ops->update_size(mddev, old_dev_sectors);
                else if (mddev->queue) {
-                       set_capacity(mddev->gendisk, mddev->array_sectors);
-                       revalidate_disk_size(mddev->gendisk, true);
+                       set_capacity_and_notify(mddev->gendisk,
+                                               mddev->array_sectors);
                }
        }
        return rv;
@@ -9035,10 +9032,9 @@ void md_do_sync(struct md_thread *thread)
                mddev_lock_nointr(mddev);
                md_set_array_sectors(mddev, mddev->pers->size(mddev, 0, 0));
                mddev_unlock(mddev);
-               if (!mddev_is_clustered(mddev)) {
-                       set_capacity(mddev->gendisk, mddev->array_sectors);
-                       revalidate_disk_size(mddev->gendisk, true);
-               }
+               if (!mddev_is_clustered(mddev))
+                       set_capacity_and_notify(mddev->gendisk,
+                                               mddev->array_sectors);
        }
 
        spin_lock(&mddev->lock);
-- 
2.29.2