forge/linux-uconsole
1
0
Fork 0
Code Issues 1 Pull requests Projects Releases Packages Wiki Activity Actions

nfp: bpf: remove the trivial JSET optimization

Browse source 
The verifier will now understand the JSET instruction, so don't
mark the dead branch in the JIT as noop.  We won't generate any
code, anyway.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
This commit is contained in:
Jakub Kicinski 2018-12-19 22:13:07 -08:00 • committed by Daniel Borkmann
commit 6e774845b3
1 changed files with 0 additions and 5 deletions
Download patch file Download diff file Expand all files Collapse all files

5
drivers/net/ethernet/netronome/nfp/bpf/jit.c
View file

@ -3054,11 +3054,6 @@ static int jset_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta)
u64 imm = insn->imm; /* sign extend */
swreg tmp_reg;
if (!imm) {
meta->skip = true;
return 0;
}
if (imm & ~0U) {
tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog));
emit_alu(nfp_prog, reg_none(),