From 997ce888324685a90fb5d0fa26293eb8826c767c Mon Sep 17 00:00:00 2001 From: Zi Shen Lim Date: Wed, 8 Jun 2016 21:18:49 -0700 Subject: [PATCH] arm64: bpf: optimize JMP_CALL Remove superfluous stack frame, saving us 3 instructions for every JMP_CALL. Signed-off-by: Zi Shen Lim Signed-off-by: David S. Miller --- arch/arm64/net/bpf_jit_comp.c | 3 --- 1 file changed, 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 */ -- 2.20.1