btrfs: Remove unused next_root_backup function

This function has been superseded by previous commits and is no longer
used so just remove it.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index b23c9fb..99ba327 100644 (file)
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -1972,56 +1972,6 @@ static int read_backup_root(struct btrfs_fs_info *fs_info, u8 priority)
        return backup_index;
 }
 
-/*
- * this copies info out of the root backup array and back into
- * the in-memory super block.  It is meant to help iterate through
- * the array, so you send it the number of backups you've already
- * tried and the last backup index you used.
- *
- * this returns -1 when it has tried all the backups
- */
-static noinline int next_root_backup(struct btrfs_fs_info *info,
-                                    struct btrfs_super_block *super,
-                                    int *num_backups_tried, int *backup_index)
-{
-       struct btrfs_root_backup *root_backup;
-       int newest = *backup_index;
-
-       if (*num_backups_tried == 0) {
-               newest = find_newest_super_backup(info);
-               if (newest == -1)
-                       return -1;
-
-               *backup_index = newest;
-               *num_backups_tried = 1;
-       } else if (*num_backups_tried == BTRFS_NUM_BACKUP_ROOTS) {
-               /* we've tried all the backups, all done */
-               return -1;
-       } else {
-               /* jump to the next oldest backup */
-               newest = (*backup_index + BTRFS_NUM_BACKUP_ROOTS - 1) %
-                       BTRFS_NUM_BACKUP_ROOTS;
-               *backup_index = newest;
-               *num_backups_tried += 1;
-       }
-       root_backup = super->super_roots + newest;
-
-       btrfs_set_super_generation(super,
-                                  btrfs_backup_tree_root_gen(root_backup));
-       btrfs_set_super_root(super, btrfs_backup_tree_root(root_backup));
-       btrfs_set_super_root_level(super,
-                                  btrfs_backup_tree_root_level(root_backup));
-       btrfs_set_super_bytes_used(super, btrfs_backup_bytes_used(root_backup));
-
-       /*
-        * fixme: the total bytes and num_devices need to match or we should
-        * need a fsck
-        */
-       btrfs_set_super_total_bytes(super, btrfs_backup_total_bytes(root_backup));
-       btrfs_set_super_num_devices(super, btrfs_backup_num_devices(root_backup));
-       return 0;
-}
-
 /* helper to cleanup workers */
 static void btrfs_stop_all_workers(struct btrfs_fs_info *fs_info)
 {