diff options
| author | Jeff Mahoney <jeffm@suse.com> | 2015-06-03 10:55:48 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-01-16 22:16:06 +0100 |
| commit | 67405a1e780c38b54c980a47f1cd5d9b633a60f2 (patch) | |
| tree | e03eb97074c78c6f5029f8523f13574fc2b9b0b2 /fs/btrfs/extent_map.h | |
| parent | fea03efa24d48514be94e93affae6d0ae8ab3edb (diff) | |
btrfs: cleanup, stop casting for extent_map->lookup everywhere
commit 95617d69326ce386c95e33db7aeb832b45ee9f8f upstream.
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>
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/btrfs/extent_map.h')
| -rw-r--r-- | fs/btrfs/extent_map.h | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/fs/btrfs/extent_map.h b/fs/btrfs/extent_map.h index b2991fd8583e..eb8b8fae036b 100644 --- a/fs/btrfs/extent_map.h +++ b/fs/btrfs/extent_map.h @@ -32,7 +32,15 @@ struct extent_map { u64 block_len; u64 generation; unsigned long flags; - struct block_device *bdev; + union { + struct block_device *bdev; + + /* + * used for chunk mappings + * flags & EXTENT_FLAG_FS_MAPPING must be set + */ + struct map_lookup *map_lookup; + }; atomic_t refs; unsigned int compress_type; struct list_head list; |