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authorSong Liu <songliubraving@fb.com>2020-06-29 23:28:43 -0700
committerAlexei Starovoitov <ast@kernel.org>2020-07-01 08:22:08 -0700
commitd141b8bc5773cbbaf5b8530f08f94fc10fff9e8c (patch)
treeb38dafc5c0d9bd82ed208d027c505ea034f764d8 /include/linux
parentbpf: Remove redundant synchronize_rcu. (diff)
downloadlinux-dev-d141b8bc5773cbbaf5b8530f08f94fc10fff9e8c.tar.xz
linux-dev-d141b8bc5773cbbaf5b8530f08f94fc10fff9e8c.zip
perf: Expose get/put_callchain_entry()
Sanitize and expose get/put_callchain_entry(). This would be used by bpf stack map. Suggested-by: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Song Liu <songliubraving@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Andrii Nakryiko <andriin@fb.com> Link: https://lore.kernel.org/bpf/20200630062846.664389-2-songliubraving@fb.com
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/perf_event.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index b4bb32082342..00ab5efa3833 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;