The struct bpf_fib_lookup should not grow outside of its 64 bytes. Add a static assert to validate this. Suggested-by: David Ahern <dsahern@xxxxxxxxxx> Signed-off-by: Anton Protopopov <aspsk@xxxxxxxxxxxxx> --- net/core/filter.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/net/core/filter.c b/net/core/filter.c index 1205dd777dc2..786d792ac816 100644 --- a/net/core/filter.c +++ b/net/core/filter.c @@ -87,6 +87,9 @@ #include "dev.h" +/* Keep the struct bpf_fib_lookup small so that it fits into a cacheline */ +static_assert(sizeof(struct bpf_fib_lookup) == 64, "struct bpf_fib_lookup size check"); + static const struct bpf_func_proto * bpf_sk_base_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog); -- 2.34.1
