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  • Forked from Reform / reform-boundary-uboot
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    Yevgeny Popovych authored
    This is the case when reading freshly created filesystem.
    The error message is like the following:
        btrfs_read_superblock: No valid root_backup found!
    
    Since the data from super_roots/root_backups is not actually used -
    decided to rework btrfs_newest_root_backup() into
    btrfs_check_super_roots() that will only check if super_roots
    array is valid and correctly handle empty scenario.
    
    As a result:
    * btrfs_read_superblock() now only checks if super_roots array is valid;
      the case when it is empty is considered OK.
    * removed root_backup pointer from btrfs_info,
      which would be NULL in case of empty super_roots.
    * btrfs_read_superblock() verifies number of devices from the superblock
      itself, not newest root_backup.
    
    Signed-off-by: default avatarYevgeny Popovych <yevgenyp@pointgrab.com>
    Cc: Marek Behun <marek.behun@nic.cz>
    Cc: Sergey Struzh <sergeys@pointgrab.com>
    d146a7b9
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