From 8283737065b2dab480cd10e00e6f8abbcb62b5b0 Mon Sep 17 00:00:00 2001 From: Jakub Kicinski <jakub.kicinski@netronome.com> Date: Thu, 12 Oct 2017 10:34:09 -0700 Subject: [PATCH] nfp: bpf: add missing return in jne_imm optimization We optimize comparisons to immediate 0 as if (reg.lo | reg.hi). The early return statement was missing, however, which means we would generate two comparisons - optimized one followed by a normal 2x 32 bit compare. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by: Simon Horman <simon.horman@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net> --- drivers/net/ethernet/netronome/nfp/bpf/jit.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/net/ethernet/netronome/nfp/bpf/jit.c b/drivers/net/ethernet/netronome/nfp/bpf/jit.c index cf8a6eb3ec993..5ac834e91aed5 100644 --- a/drivers/net/ethernet/netronome/nfp/bpf/jit.c +++ b/drivers/net/ethernet/netronome/nfp/bpf/jit.c @@ -1191,6 +1191,7 @@ static int jne_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta) emit_alu(nfp_prog, reg_none(), reg_a(insn->dst_reg * 2), ALU_OP_OR, reg_b(insn->dst_reg * 2 + 1)); emit_br(nfp_prog, BR_BNE, insn->off, 0); + return 0; } tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog)); -- 2.30.2