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

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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>
This commit is contained in:
Daniel Borkmann
2015-03-01 12:31:47 +01:00
committed by David S. Miller
parent 96be4325f4
commit 24701ecea7
5 changed files with 11 additions and 12 deletions
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4
include/linux/bpf.h
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@@ -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;
};