linux-kernel - Re: [PATCH bpf-next v7 12/24] HID: Kconfig: split HID support and hid-core compilation

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Date:   Thu, 28 Jul 2022 16:14:34 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Benjamin Tissoires <benjamin.tissoires@...hat.com>
Cc:     Jiri Kosina <jikos@...nel.org>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        Kumar Kartikeya Dwivedi <memxor@...il.com>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...nel.org>, Shuah Khan <shuah@...nel.org>,
        Dave Marchevsky <davemarchevsky@...com>,
        Joe Stringer <joe@...ium.io>, Jonathan Corbet <corbet@....net>,
        Tero Kristo <tero.kristo@...ux.intel.com>,
        linux-kernel@...r.kernel.org, linux-input@...r.kernel.org,
        netdev@...r.kernel.org, bpf@...r.kernel.org,
        linux-kselftest@...r.kernel.org, linux-doc@...r.kernel.org
Subject: Re: [PATCH bpf-next v7 12/24] HID: Kconfig: split HID support and
 hid-core compilation

On Thu, Jul 21, 2022 at 05:36:13PM +0200, Benjamin Tissoires wrote:
> Currently, we step into drivers/hid/ based on the value of
> CONFIG_HID.
> 
> However, that value is a tristate, meaning that it can be a module.
> 
> As per the documentation, if we jump into the subdirectory by
> following an obj-m, we can not compile anything inside that
> subdirectory in vmlinux. It is considered as a bug.
> 
> To make things more friendly to HID-BPF, split HID (the HID core
> parameter) from HID_SUPPORT (do we want any kind of HID support in the
> system?), and make this new config a boolean.
> 
> Signed-off-by: Benjamin Tissoires <benjamin.tissoires@...hat.com>
> 
> ---

Reviewed-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>