netdev - [PATCH net-next v3 1/3] bpf: use the same condition in perf event set/free bpf handler

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Date:   Mon, 23 Oct 2017 23:53:07 -0700
From:   Yonghong Song <yhs@...com>
To:     <peterz@...radead.org>, <rostedt@...dmis.org>, <ast@...com>,
        <daniel@...earbox.net>, <kafai@...com>, <netdev@...r.kernel.org>
CC:     <kernel-team@...com>
Subject: [PATCH net-next v3 1/3] bpf: use the same condition in perf event set/free bpf handler

This is a cleanup such that doing the same check in
perf_event_free_bpf_prog as we already do in
perf_event_set_bpf_prog step.

Signed-off-by: Yonghong Song <yhs@...com>
Acked-by: Alexei Starovoitov <ast@...nel.org>
Acked-by: Martin KaFai Lau <kafai@...com>
---
 kernel/events/core.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/kernel/events/core.c b/kernel/events/core.c
index 31ee304..9f78a682 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -8191,10 +8191,10 @@ static void perf_event_free_bpf_prog(struct perf_event *event)
 {
 	struct bpf_prog *prog;
 
-	perf_event_free_bpf_handler(event);
-
-	if (!event->tp_event)
+	if (event->attr.type != PERF_TYPE_TRACEPOINT) {
+		perf_event_free_bpf_handler(event);
 		return;
+	}
 
 	prog = event->tp_event->prog;
 	if (prog && event->tp_event->bpf_prog_owner == event) {
-- 
2.9.5