btrfs: use smaller type for btrfs_path lowest_level
The level is 0..7, we can use smaller type. The size of btrfs_path is now 136 bytes from 144, which is +2 objects that fit into a 4k slab. Signed-off-by: David Sterba <dsterba@suse.com>
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@ -598,7 +598,7 @@ struct btrfs_path {
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int locks[BTRFS_MAX_LEVEL];
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u8 reada;
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/* keep some upper locks as we walk down */
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int lowest_level;
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u8 lowest_level;
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/*
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* set by btrfs_split_item, tells search_slot to keep all locks
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