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btrfs: cleanup, stop casting for extent_map->lookup everywhere

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Overloading extent_map->bdev to struct map_lookup * might have started out
as a means to an end, but it's a pattern that's used all over the place
now. Let's get rid of the casting and just add a union instead.

Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Jeff Mahoney 2015-06-03 10:55:48 -04:00 • committed by David Sterba
commit 95617d6932
6 changed files with 25 additions and 17 deletions
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