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bpf: remove stubs for cBPF from arch code

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Remove the dummy bpf_jit_compile() stubs for eBPF JITs and make
that a single __weak function in the core that can be overridden
similarly to the eBPF one. Also remove stale pr_err() mentions
of bpf_jit_compile.

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Daniel Borkmann
2017-02-16 22:24:49 +01:00
committed by David S. Miller
parent c78f8bdfa1
commit 9383191da4
6 changed files with 14 additions and 27 deletions
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12
kernel/bpf/core.c
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@@ -1154,12 +1154,22 @@ const struct bpf_func_proto bpf_tail_call_proto = {
.arg3_type = ARG_ANYTHING,
};
/* For classic BPF JITs that don't implement bpf_int_jit_compile(). */
/* Stub for JITs that only support cBPF. eBPF programs are interpreted.
* It is encouraged to implement bpf_int_jit_compile() instead, so that
* eBPF and implicitly also cBPF can get JITed!
*/
struct bpf_prog * __weak bpf_int_jit_compile(struct bpf_prog *prog)
{
return prog;
}
/* Stub for JITs that support eBPF. All cBPF code gets transformed into
* eBPF by the kernel and is later compiled by bpf_int_jit_compile().
*/
void __weak bpf_jit_compile(struct bpf_prog *prog)
{
}
bool __weak bpf_helper_changes_pkt_data(void *func)
{
return false;