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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
parent a7ca42256d
commit 95617d6932
6 changed files with 25 additions and 17 deletions
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2
fs/btrfs/extent_map.c
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@@ -76,7 +76,7 @@ void free_extent_map(struct extent_map *em)
WARN_ON(extent_map_in_tree(em));
WARN_ON(!list_empty(&em->list));
if (test_bit(EXTENT_FLAG_FS_MAPPING, &em->flags))
kfree(em->bdev);
kfree(em->map_lookup);
kmem_cache_free(extent_map_cache, em);
}
}