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From: Song Liu <songliubraving@fb.com>
To: <bpf@vger.kernel.org>, <netdev@vger.kernel.org>,
	<linux-kernel@vger.kernel.org>
Cc: <peterz@infradead.org>, <ast@kernel.org>, <daniel@iogearbox.net>,
	<kernel-team@fb.com>, <john.fastabend@gmail.com>,
	<kpsingh@chromium.org>, Song Liu <songliubraving@fb.com>
Subject: [PATCH v2 bpf-next 1/4] perf: export get/put_chain_entry()
Date: Thu, 25 Jun 2020 17:13:29 -0700	[thread overview]
Message-ID: <20200626001332.1554603-2-songliubraving@fb.com> (raw)
In-Reply-To: <20200626001332.1554603-1-songliubraving@fb.com>

This would be used by bpf stack mapo.

Signed-off-by: Song Liu <songliubraving@fb.com>
---
 include/linux/perf_event.h | 2 ++
 kernel/events/callchain.c  | 4 ++--
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index b4bb32082342c..00ab5efa38334 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -1244,6 +1244,8 @@ get_perf_callchain(struct pt_regs *regs, u32 init_nr, bool kernel, bool user,
 extern struct perf_callchain_entry *perf_callchain(struct perf_event *event, struct pt_regs *regs);
 extern int get_callchain_buffers(int max_stack);
 extern void put_callchain_buffers(void);
+extern struct perf_callchain_entry *get_callchain_entry(int *rctx);
+extern void put_callchain_entry(int rctx);
 
 extern int sysctl_perf_event_max_stack;
 extern int sysctl_perf_event_max_contexts_per_stack;
diff --git a/kernel/events/callchain.c b/kernel/events/callchain.c
index 334d48b16c36d..50b8a1622807f 100644
--- a/kernel/events/callchain.c
+++ b/kernel/events/callchain.c
@@ -149,7 +149,7 @@ void put_callchain_buffers(void)
 	}
 }
 
-static struct perf_callchain_entry *get_callchain_entry(int *rctx)
+struct perf_callchain_entry *get_callchain_entry(int *rctx)
 {
 	int cpu;
 	struct callchain_cpus_entries *entries;
@@ -168,7 +168,7 @@ static struct perf_callchain_entry *get_callchain_entry(int *rctx)
 		(*rctx * perf_callchain_entry__sizeof()));
 }
 
-static void
+void
 put_callchain_entry(int rctx)
 {
 	put_recursion_context(this_cpu_ptr(callchain_recursion), rctx);
-- 
2.24.1


  reply	other threads:[~2020-06-26  0:14 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-26  0:13 [PATCH v2 bpf-next 0/4] bpf: introduce bpf_get_task_stack() Song Liu
2020-06-26  0:13 ` Song Liu [this message]
2020-06-26 11:00   ` [PATCH v2 bpf-next 1/4] perf: export get/put_chain_entry() Peter Zijlstra
2020-06-26 20:06     ` Andrii Nakryiko
2020-06-26 21:38       ` Song Liu
2020-06-26 21:29     ` Song Liu
2020-06-26  0:13 ` [PATCH v2 bpf-next 2/4] bpf: introduce helper bpf_get_task_stak() Song Liu
2020-06-26 15:40   ` Yonghong Song
2020-06-26 22:37     ` Song Liu
2020-06-26 20:17   ` Andrii Nakryiko
2020-06-26 20:22     ` Andrii Nakryiko
2020-06-26 22:45     ` Song Liu
2020-06-26 22:51       ` Andrii Nakryiko
2020-06-26 23:47         ` Song Liu
2020-06-27  0:06           ` Andrii Nakryiko
2020-06-26  0:13 ` [PATCH v2 bpf-next 3/4] bpf: allow %pB in bpf_seq_printf() and bpf_trace_printk() Song Liu
2020-06-26 15:44   ` [Potential Spoof] " Yonghong Song
2020-06-26  0:13 ` [PATCH v2 bpf-next 4/4] selftests/bpf: add bpf_iter test with bpf_get_task_stack() Song Liu
2020-06-26 15:52   ` Yonghong Song
2020-06-26 20:21   ` Andrii Nakryiko
2020-06-26 23:05     ` Song Liu
2020-06-26 23:11       ` Andrii Nakryiko
2020-06-26 23:40         ` Song Liu

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