Btrfs: remove unneeded field / smaller extent_map structure

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We don't need to have an unsigned int field in the extent_map struct
to tell us whether the extent map is in the inode's extent_map tree or
not. We can use the rb_node struct field and the RB_CLEAR_NODE and
RB_EMPTY_NODE macros to achieve the same task.

This reduces sizeof(struct extent_map) from 152 bytes to 144 bytes (on a
64 bits system).

Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com>
Reviewed-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Josef Bacik <jbacik@fb.com>

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Filipe Manana 2014-02-25 14:15:12 +00:00 • committed by Josef Bacik

parent e84752d434

commit cbc0e9287d

3 changed files with 12 additions and 13 deletions

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2

fs/btrfs/extent_io.c

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17

fs/btrfs/extent_map.c

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6

fs/btrfs/extent_map.h

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