[PATCH net-next 3/3] arm64: bpf: optimize LD_ABS, LD_IND

[Zi Shen Lim]

Remove superfluous stack frame, saving us 3 instructions for every
LD_ABS or LD_IND.

Signed-off-by: Zi Shen Lim <zlim....@gmail.com>
---
 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 7ae304e..b2fc97a 100644
--- a/arch/arm64/net/bpf_jit_comp.c
+++ b/arch/arm64/net/bpf_jit_comp.c
@@ -731,11 +731,8 @@ emit_cond_jmp:
                emit_a64_mov_i64(r3, size, ctx);
                emit(A64_SUB_I(1, r4, fp, STACK_SIZE), ctx);
                emit_a64_mov_i64(r5, (unsigned long)bpf_load_pointer, ctx);
-               emit(A64_PUSH(A64_FP, A64_LR, A64_SP), ctx);
-               emit(A64_MOV(1, A64_FP, A64_SP), ctx);
                emit(A64_BLR(r5), ctx);
                emit(A64_MOV(1, r0, A64_R(0)), ctx);
-               emit(A64_POP(A64_FP, A64_LR, A64_SP), ctx);
 
                jmp_offset = epilogue_offset(ctx);
                check_imm19(jmp_offset);
-- 
1.9.1