bpf: use bitfields for simple per-subprog bool flags

We have a bunch of bool flags for each subprog. Instead of wasting bytes
for them, use bitfields instead.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Eduard Zingerman <eddyz87@gmail.com>
Link: https://lore.kernel.org/r/20231204233931.49758-5-andrii@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

diff --git a/include/linux/bpf_verifier.h b/include/linux/bpf_verifier.h
index 314b679fb4940307e123a2bfba5da55120079958..c2819a6579a520545dac64f60177e4249c139258 100644 (file)
--- a/include/linux/bpf_verifier.h
+++ b/include/linux/bpf_verifier.h
@@ -611,12 +611,12 @@ struct bpf_subprog_info {
        u32 start; /* insn idx of function entry point */
        u32 linfo_idx; /* The idx to the main_prog->aux->linfo */
        u16 stack_depth; /* max. stack depth used by this function */
-       bool has_tail_call;
-       bool tail_call_reachable;
-       bool has_ld_abs;
-       bool is_cb;
-       bool is_async_cb;
-       bool is_exception_cb;
+       bool has_tail_call: 1;
+       bool tail_call_reachable: 1;
+       bool has_ld_abs: 1;
+       bool is_cb: 1;
+       bool is_async_cb: 1;
+       bool is_exception_cb: 1;
 };
 
 struct bpf_verifier_env;