linux-kernel - [PATCH v6 2/7] perf/bpf: Create bpf_overflow_handler() stub for !CONFIG_BPF

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Message-Id: <20240412015019.7060-3-khuey@kylehuey.com>
Date: Thu, 11 Apr 2024 18:50:14 -0700
From: Kyle Huey <me@...ehuey.com>
To: Kyle Huey <khuey@...ehuey.com>,
	linux-kernel@...r.kernel.org,
	Andrii Nakryiko <andrii.nakryiko@...il.com>,
	Jiri Olsa <jolsa@...nel.org>,
	Namhyung Kim <namhyung@...nel.org>,
	Marco Elver <elver@...gle.com>,
	Yonghong Song <yonghong.song@...ux.dev>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...nel.org>,
	Arnaldo Carvalho de Melo <acme@...nel.org>
Cc: Robert O'Callahan <robert@...llahan.org>,
	bpf@...r.kernel.org,
	Ingo Molnar <mingo@...hat.com>,
	Mark Rutland <mark.rutland@....com>,
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
	Ian Rogers <irogers@...gle.com>,
	Adrian Hunter <adrian.hunter@...el.com>,
	linux-perf-users@...r.kernel.org
Subject: [PATCH v6 2/7] perf/bpf: Create bpf_overflow_handler() stub for !CONFIG_BPF_SYSCALL

This will allow __perf_event_overflow() (which is independent of
CONFIG_BPF_SYSCALL) to call bpf_overflow_handler().

Signed-off-by: Kyle Huey <khuey@...ehuey.com>
---
 kernel/events/core.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/kernel/events/core.c b/kernel/events/core.c
index ee025125a681..a7c2a739a27c 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -9624,6 +9624,12 @@ static void perf_event_free_bpf_handler(struct perf_event *event)
 	bpf_prog_put(prog);
 }
 #else
+static void bpf_overflow_handler(struct perf_event *event,
+				 struct perf_sample_data *data,
+				 struct pt_regs *regs)
+{
+}
+
 static int perf_event_set_bpf_handler(struct perf_event *event,
 				      struct bpf_prog *prog,
 				      u64 bpf_cookie)
-- 
2.34.1