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btrfs: Add read_backup_root
authorNikolay Borisov <nborisov@suse.com>
Tue, 15 Oct 2019 15:42:19 +0000 (18:42 +0300)
committerDavid Sterba <dsterba@suse.com>
Mon, 18 Nov 2019 16:51:46 +0000 (17:51 +0100)
commitbd2336b2ac119e65457261528883d9623d41315f
treeeedd342e71744f0198c9ab3a6375ec59a42c63f9
parentfc2e4c5b3508f4d0ab981be9aa55bfb80bf971d1
btrfs: Add read_backup_root

This function will replace next_root_backup with a much saner/cleaner
interface.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
fs/btrfs/disk-io.c