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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>
This commit is contained in:
Zi Shen Lim 2016-06-08 21:18:49 -07:00 committed by David S. Miller
parent ddb55992b0
commit 997ce88832
1 changed files with 0 additions and 3 deletions
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3
arch/arm64/net/bpf_jit_comp.c
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@ -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 */