# Re: \[PATCH v8 14/18\] perf: Remove get\_perf\_callchain() init\_nr argument

- From: Alexei Starovoitov \<hidden\>
- Date: 2025-05-09 17:11:50 
- List: linux-trace-kernel
- Page: https://ratatoskr.run/linux-trace-kernel/2025/05/3049565
- Thread: https://ratatoskr.run/linux-trace-kernel/2025/05/3049525/t.md

```text
On Fri, May 9, 2025 at 10:07 AM Steven Rostedt [ref] wrote:
>
> From: Josh Poimboeuf <jpoimboe@kernel.org>
>
> The 'init_nr' argument has double duty: it's used to initialize both the
> number of contexts and the number of stack entries.  That's confusing
> and the callers always pass zero anyway.  Hard code the zero.
>
> Acked-by: Namhyung Kim <Namhyung@kernel.org>
> Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
> Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
> ---
>  include/linux/perf_event.h |  2 +-
>  kernel/bpf/stackmap.c      |  4 ++--

Acked-by: Alexei Starovoitov <ast@kernel.org>
```