netdev - [PATCH net-next 2/3] bpf: use bpf_get_smp_processor_id

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Date:   Fri, 23 Sep 2016 01:28:36 +0200
From:   Daniel Borkmann <daniel@...earbox.net>
To:     davem@...emloft.net
Cc:     alexei.starovoitov@...il.com, netdev@...r.kernel.org,
        Daniel Borkmann <daniel@...earbox.net>
Subject: [PATCH net-next 2/3] bpf: use bpf_get_smp_processor_id_proto instead of raw one

Same motivation as in commit 80b48c445797 ("bpf: don't use raw processor
id in generic helper"), but this time for XDP typed programs. Thus, allow
for preemption checks when we have DEBUG_PREEMPT enabled, and otherwise
use the raw variant.

Signed-off-by: Daniel Borkmann <daniel@...earbox.net>
Acked-by: Alexei Starovoitov <ast@...nel.org>
---
 net/core/filter.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/net/core/filter.c b/net/core/filter.c
index e5d9977..acf84fb 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -2551,6 +2551,8 @@ xdp_func_proto(enum bpf_func_id func_id)
 	switch (func_id) {
 	case BPF_FUNC_perf_event_output:
 		return &bpf_xdp_event_output_proto;
+	case BPF_FUNC_get_smp_processor_id:
+		return &bpf_get_smp_processor_id_proto;
 	default:
 		return sk_filter_func_proto(func_id);
 	}
-- 
1.9.3