| commit | 6205b9cf200d1c3dda5491666ddc33e7b70fe469 | [log] [tgz] |
|---|---|---|
| author | Daniel Borkmann <daniel@iogearbox.net> | Fri Feb 19 23:05:27 2016 +0100 |
| committer | David S. Miller <davem@davemloft.net> | Sun Feb 21 22:07:11 2016 -0500 |
| tree | 78c48c223c2b45253361e929a1bffc291dd16925 | |
| parent | 2f72959a9c1260ade234f353ccca91118151af66 [diff] |
bpf: don't emit mov A,A on return While debugging with bpf_jit_disasm I noticed emissions of 'mov %eax,%eax', and found that this comes from BPF_RET | BPF_A translations from classic BPF. Emitting this is unnecessary as BPF_REG_A is mapped into BPF_REG_0 already, therefore only emit a mov when immediates are used as return value. Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>