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Message-ID: <20220331131732.5e2305ee@gandalf.local.home>
Date:   Thu, 31 Mar 2022 13:17:32 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
Cc:     Masahiro Yamada <masahiroy@...nel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Beau Belgrave <beaub@...ux.microsoft.com>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        linux-trace-devel <linux-trace-devel@...r.kernel.org>,
        bpf <bpf@...r.kernel.org>, netdev <netdev@...r.kernel.org>,
        Alexei Starovoitov <alexei.starovoitov@...il.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Michal Marek <michal.lkml@...kovi.net>,
        ndesaulniers <ndesaulniers@...gle.com>,
        Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>
Subject: Re: [PATCH] tracing: do not export user_events uapi

On Thu, 31 Mar 2022 12:07:28 -0400 (EDT)
Mathieu Desnoyers <mathieu.desnoyers@...icios.com> wrote:

> diff --git a/kernel/trace/trace_events_user.c b/kernel/trace/trace_events_user.c
> index 8b3d241a31c2..823d7b09dcba 100644
> --- a/kernel/trace/trace_events_user.c
> +++ b/kernel/trace/trace_events_user.c
> @@ -18,7 +18,7 @@
>  #include <linux/tracefs.h>
>  #include <linux/types.h>
>  #include <linux/uaccess.h>
> -#include <uapi/linux/user_events.h>
> +#include <linux/user_events.h>
>  #include "trace.h"
>  #include "trace_dynevent.h"
> 
> Including <linux/user_events.h> will continue to work even when the header is
> moved to uapi in the future.

Actually, when I thought of this, I was thinking more of:

diff --git a/kernel/trace/trace_events_user.c b/kernel/trace/trace_events_user.c
index 846c27bc7aef..0f3aa855cf72 100644
--- a/kernel/trace/trace_events_user.c
+++ b/kernel/trace/trace_events_user.c
@@ -18,7 +18,11 @@
 #include <linux/tracefs.h>
 #include <linux/types.h>
 #include <linux/uaccess.h>
+#ifdef CONFIG_COMPILE_TEST
+#include <linux/user_events.h>
+#else
 #include <uapi/linux/user_events.h>
+#endif
 #include "trace.h"
 #include "trace_dynevent.h"
 
That way, when we take it out of broken state, it will fail to compile, and
remind us to put it back into the uapi directory.

-- Steve

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