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Many of the structs recently added to track field info for linked-list head are useful as-is for rbtree root. So let's do a mechanical renaming of list_head-related types and fields: include/linux/bpf.h: struct btf_field_list_head -> struct btf_field_graph_root list_head -> graph_root in struct btf_field union kernel/bpf/btf.c: list_head -> graph_root in struct btf_field_info This is a nonfunctional change, functionality to actually use these fields for rbtree will be added in further patches. Signed-off-by: Dave Marchevsky <davemarchevsky@fb.com> Link: https://lore.kernel.org/r/20221217082506.1570898-5-davemarchevsky@fb.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>