s390/bpf: Use bpf_skip() in bpf_jit_prologue() (94ad428d) · Commits · 戴 / test

Now that we have bpf_skip() for emitting nops, use it in bpf_jit_prologue() in order to reduce code duplication. Signed-off-by:

arch/s390/net/bpf_jit_comp.c

+5 −4

Original line number	Diff line number	Diff line
		@@ -519,10 +519,11 @@ static void bpf_jit_prologue(struct bpf_jit *jit, u32 stack_depth)
		/* xc STK_OFF_TCCNT(4,%r15),STK_OFF_TCCNT(%r15) */
		_EMIT6(0xd703f000 \| STK_OFF_TCCNT, 0xf000 \| STK_OFF_TCCNT);
		} else {
		/* j tail_call_start: NOP if no tail calls are used */
		EMIT4_PCREL(0xa7f40000, 6);
		/* bcr 0,%0 */
		EMIT2(0x0700, 0, REG_0);
		/*
		* There are no tail calls. Insert nops in order to have
		* tail_call_start at a predictable offset.
		*/
		bpf_skip(jit, 6);
		}
		/* Tail calls have to skip above initialization */
		jit->tail_call_start = jit->prg;