btrfs: remove redundant btrfs_balance_control::fs_info

The fs_info is always available from the context so we don't need to
store it in the structure.

Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>

3 files changed, 6 insertions, 9 deletions

diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index b708f12292b6..48e2ddff32bd 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -4428,7 +4428,6 @@ locked:
                 goto out_bargs;
         }
 
-        bctl->fs_info = fs_info;
         if (arg) {
                 memcpy(&bctl->data, &bargs->data, sizeof(bctl->data));
                 memcpy(&bctl->meta, &bargs->meta, sizeof(bctl->meta));
@@ -4454,7 +4453,7 @@ do_balance:
          */
         need_unlock = false;
 
-        ret = btrfs_balance(bctl, bargs);
+        ret = btrfs_balance(fs_info, bctl, bargs);
         bctl = NULL;
 
         if (arg) {
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 45227c83b742..ebc81766fc86 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -3769,10 +3769,10 @@ static inline int validate_convert_profile(struct btrfs_balance_args *bctl_arg,
 /*
  * Should be called with balance mutexe held
  */
-int btrfs_balance(struct btrfs_balance_control *bctl,
+int btrfs_balance(struct btrfs_fs_info *fs_info,
+                  struct btrfs_balance_control *bctl,
                   struct btrfs_ioctl_balance_args *bargs)
 {
-        struct btrfs_fs_info *fs_info = bctl->fs_info;
         u64 meta_target, data_target;
         u64 allowed;
         int mixed = 0;
@@ -3940,7 +3940,7 @@ static int balance_kthread(void *data)
         mutex_lock(&fs_info->balance_mutex);
         if (fs_info->balance_ctl) {
                 btrfs_info(fs_info, "continuing balance");
-                ret = btrfs_balance(fs_info->balance_ctl, NULL);
+                ret = btrfs_balance(fs_info, fs_info->balance_ctl, NULL);
         }
         mutex_unlock(&fs_info->balance_mutex);
 
@@ -4011,7 +4011,6 @@ int btrfs_recover_balance(struct btrfs_fs_info *fs_info)
         leaf = path->nodes[0];
         item = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_balance_item);
 
-        bctl->fs_info = fs_info;
         bctl->flags = btrfs_balance_flags(leaf, item);
         bctl->flags |= BTRFS_BALANCE_RESUME;
 
diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h
index 39787a2f5fb4..5139ec8daf4c 100644
--- a/fs/btrfs/volumes.h
+++ b/fs/btrfs/volumes.h
@@ -352,8 +352,6 @@ struct map_lookup {
 struct btrfs_balance_args;
 struct btrfs_balance_progress;
 struct btrfs_balance_control {
-        struct btrfs_fs_info *fs_info;
-
         struct btrfs_balance_args data;
         struct btrfs_balance_args meta;
         struct btrfs_balance_args sys;
@@ -432,7 +430,8 @@ struct btrfs_device *btrfs_find_device(struct btrfs_fs_info *fs_info, u64 devid,
                                        u8 *uuid, u8 *fsid);
 int btrfs_shrink_device(struct btrfs_device *device, u64 new_size);
 int btrfs_init_new_device(struct btrfs_fs_info *fs_info, const char *path);
-int btrfs_balance(struct btrfs_balance_control *bctl,
+int btrfs_balance(struct btrfs_fs_info *fs_info,
+                  struct btrfs_balance_control *bctl,
                   struct btrfs_ioctl_balance_args *bargs);
 int btrfs_resume_balance_async(struct btrfs_fs_info *fs_info);
 int btrfs_recover_balance(struct btrfs_fs_info *fs_info);