diff options
| author |   Zi Shen Lim <zlim.lnx@gmail.com> | 2016-06-08 21:18:49 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2016-06-10 23:11:50 -0700 |
| commit | 997ce888324685a90fb5d0fa26293eb8826c767c (patch) | |
| tree | 552517342efddafa631627c3695d02a22221e3c4 /arch | |
| parent | arm64: bpf: implement bpf_tail_call() helper (diff) | |
| download | linux-dev-997ce888324685a90fb5d0fa26293eb8826c767c.tar.xz linux-dev-997ce888324685a90fb5d0fa26293eb8826c767c.zip | |
arm64: bpf: optimize JMP_CALL
Remove superfluous stack frame, saving us 3 instructions for
every JMP_CALL.
Signed-off-by: Zi Shen Lim <zlim.lnx@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm64/net/bpf_jit_comp.c | 3 |
1 files changed, 0 insertions, 3 deletions
diff --git a/arch/arm64/net/bpf_jit_comp.c b/arch/arm64/net/bpf_jit_comp.c index 51abc979d6cb..7ae304e0a078 100644 --- a/arch/arm64/net/bpf_jit_comp.c +++ b/arch/arm64/net/bpf_jit_comp.c @@ -578,11 +578,8 @@ emit_cond_jmp: const u64 func = (u64)__bpf_call_base + imm; emit_a64_mov_i64(tmp, func, ctx); - emit(A64_PUSH(A64_FP, A64_LR, A64_SP), ctx); - emit(A64_MOV(1, A64_FP, A64_SP), ctx); emit(A64_BLR(tmp), ctx); emit(A64_MOV(1, r0, A64_R(0)), ctx); - emit(A64_POP(A64_FP, A64_LR, A64_SP), ctx); break; } /* tail call */ |