ebpf: move read-only fields to bpf_prog and shrink bpf_prog_aux

is_gpl_compatible and prog_type should be moved directly into bpf_prog
as they stay immutable during bpf_prog's lifetime, are core attributes
and they can be locked as read-only later on via bpf_prog_select_runtime().

With a bit of rearranging, this also allows us to shrink bpf_prog_aux
to exactly 1 cacheline.

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 3 deletions

diff --git a/include/linux/bpf.h b/include/linux/bpf.h
index 9c458144cdb4..a1a7ff2df328 100644
--- a/include/linux/bpf.h
+++ b/include/linux/bpf.h
@@ -117,11 +117,9 @@ struct bpf_prog;
 
 struct bpf_prog_aux {
 	atomic_t refcnt;
-	bool is_gpl_compatible;
-	enum bpf_prog_type prog_type;
+	u32 used_map_cnt;
 	const struct bpf_verifier_ops *ops;
 	struct bpf_map **used_maps;
-	u32 used_map_cnt;
 	struct bpf_prog *prog;
 	struct work_struct work;
 };