linux-kernel - Re: [PATCH] tracing: do not export user

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Message-Id: <20220331102253.8793580dbc02c93dd897e52a@kernel.org>
Date:   Thu, 31 Mar 2022 10:22:53 +0900
From:   Masami Hiramatsu <mhiramat@...nel.org>
To:     Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
Cc:     Steven Rostedt <rostedt@...dmis.org>, 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>,
        Network Development <netdev@...r.kernel.org>,
        Alexei Starovoitov <alexei.starovoitov@...il.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [PATCH] tracing: do not export user_events uapi

On Wed, 30 Mar 2022 16:17:55 -0400
Mathieu Desnoyers <mathieu.desnoyers@...icios.com> wrote:

> In addition to mark the USER_EVENTS feature BROKEN until all interested
> parties figure out the user-space API, do not install the uapi header.
> 
> This prevents situations where a non-final uapi header would end up
> being installed into a distribution image and used to build user-space
> programs that would then run against newer kernels that will implement
> user events with a different ABI.
> 
> Link: https://lore.kernel.org/all/20220330155835.5e1f6669@gandalf.local.home
> 

Looks good to me.

Reviewed-by: Masami Hiramatsu <mhiramat@...nel.org>

Thank you,

> Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
> ---
>  include/uapi/Kbuild | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/include/uapi/Kbuild b/include/uapi/Kbuild
> index 61ee6e59c930..425ea8769ddc 100644
> --- a/include/uapi/Kbuild
> +++ b/include/uapi/Kbuild
> @@ -12,3 +12,6 @@ ifeq ($(wildcard $(objtree)/arch/$(SRCARCH)/include/generated/uapi/asm/kvm_para.
>  no-export-headers += linux/kvm_para.h
>  endif
>  endif
> +
> +# API is not finalized
> +no-export-headers += linux/user_events.h
> -- 
> 2.20.1
> 


-- 
Masami Hiramatsu <mhiramat@...nel.org>