idr_layer->layer is always accessed in read path,
move it in the front.
idr_layer->bitmap is moved on the bottom. And
rcu_head shares with bitmap due to they do not
be accessed at the same time.
idr->id_free/id_free_cnt/lock are free list fields,
and moved to the bottom. They will be removed
in
idr_layer-layer is always accessed in read path,
move it in the front.
idr_layer-bitmap is moved on the bottom. And
rcu_head shares with bitmap due to they do not
be accessed at the same time.
idr-id_free/id_free_cnt/lock are free list fields,
and moved to the bottom. They will be removed
in
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