UBI: introduce volume refcounting

Add ref_count field to UBI volumes and remove weired "vol->removed"
field. This way things are better understandable and we do not have
to do whold show_attr operation under spinlock.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/mtd/ubi/vtbl.c b/drivers/mtd/ubi/vtbl.c
index 5879fdb3e6d5..a37dc7a213b1 100644
--- a/drivers/mtd/ubi/vtbl.c
+++ b/drivers/mtd/ubi/vtbl.c
@@ -565,6 +565,7 @@ static int init_volumes(struct ubi_device *ubi, const struct ubi_scan_info *si,
                 vol->last_eb_bytes = sv->last_data_size;
         }
 
+        /* And add the layout volume */
         vol = kzalloc(sizeof(struct ubi_volume), GFP_KERNEL);
         if (!vol)
                 return -ENOMEM;
@@ -580,6 +581,7 @@ static int init_volumes(struct ubi_device *ubi, const struct ubi_scan_info *si,
         vol->used_bytes =
                 (long long)vol->used_ebs * (ubi->leb_size - vol->data_pad);
         vol->vol_id = UBI_LAYOUT_VOL_ID;
+        vol->ref_count = 1;
 
         ubi_assert(!ubi->volumes[i]);
         ubi->volumes[vol_id2idx(ubi, vol->vol_id)] = vol;