btrfs: Cleanup and simplify find_newest_super_backup

Browse source

Backup roots are always written in a circular manner. By definition we
can only ever have 1 backup root whose generation equals to that of the
superblock. Hence, the 'if' in the for loop will trigger at most once.
This is sufficient to return the newest backup root.

Furthermore the newest_gen parameter is always set to the generation of
the superblock. This value can be obtained from the fs_info.

This patch removes the unnecessary code dealing with the wraparound
case and makes 'newest_gen' a local variable.

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

...

This commit is contained in:

Nikolay Borisov 2019-10-15 18:42:17 +03:00 • committed by David Sterba

parent 16ad3be175

commit 01f0f9da9d

1 changed files with 11 additions and 20 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

31

fs/btrfs/disk-io.c

View file