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Date: Fri, 23 Feb 2024 20:44:55 +0100
From: Benjamin Tissoires <bentiss@kernel.org>
To: Eduard Zingerman <eddyz87@gmail.com>
Cc: Alexei Starovoitov <ast@kernel.org>, 
	Daniel Borkmann <daniel@iogearbox.net>, John Fastabend <john.fastabend@gmail.com>, 
	Andrii Nakryiko <andrii@kernel.org>, Martin KaFai Lau <martin.lau@linux.dev>, 
	Song Liu <song@kernel.org>, Yonghong Song <yonghong.song@linux.dev>, 
	KP Singh <kpsingh@kernel.org>, Stanislav Fomichev <sdf@google.com>, Hao Luo <haoluo@google.com>, 
	Jiri Olsa <jolsa@kernel.org>, Jiri Kosina <jikos@kernel.org>, 
	Benjamin Tissoires <benjamin.tissoires@redhat.com>, Jonathan Corbet <corbet@lwn.net>, Shuah Khan <shuah@kernel.org>, 
	bpf@vger.kernel.org, linux-kernel@vger.kernel.org, linux-input@vger.kernel.org, 
	linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org
Subject: Re: [PATCH RFC bpf-next v3 09/16] HID: bpf/dispatch: regroup kfuncs
 definitions
Message-ID: <ld4rv7gw6cpj4emlqo5tj5zprrrk4qjlr6xl3mfkdrq4uyoof2@zhmehkrr5st7>
References: <20240221-hid-bpf-sleepable-v3-0-1fb378ca6301@kernel.org>
 <20240221-hid-bpf-sleepable-v3-9-1fb378ca6301@kernel.org>
 <962a182f514e96ce258e7173608c282a6183775a.camel@gmail.com>
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In-Reply-To: <962a182f514e96ce258e7173608c282a6183775a.camel@gmail.com>

On Feb 22 2024, Eduard Zingerman wrote:
> On Wed, 2024-02-21 at 17:25 +0100, Benjamin Tissoires wrote:
> 
> [...]
> 
> > diff --git a/drivers/hid/bpf/hid_bpf_dispatch.c b/drivers/hid/bpf/hid_bpf_dispatch.c
> > index e630caf644e8..52abb27426f4 100644
> > --- a/drivers/hid/bpf/hid_bpf_dispatch.c
> > +++ b/drivers/hid/bpf/hid_bpf_dispatch.c
> > @@ -143,48 +143,6 @@ u8 *call_hid_bpf_rdesc_fixup(struct hid_device *hdev, u8 *rdesc, unsigned int *s
> >  }
> >  EXPORT_SYMBOL_GPL(call_hid_bpf_rdesc_fixup);
> >  
> > -/* Disables missing prototype warnings */
> > -__bpf_kfunc_start_defs();
> 
> Note:
> this patch does not apply on top of current bpf-next [0] because
> __bpf_kfunc_start_defs and __bpf_kfunc are not present in [0].
> 
> [0] commit 58fd62e0aa50 ("bpf: Clarify batch lookup/lookup_and_delete semantics")

Right... this was in Linus' tree as a late 6.8-rcx addition. Depending
on how bpf-next will be rebased/merged, I'll see if I merge this
subseries through the HID tree or the BPF one.

Cheers,
Benjamin

> 
> > -
> > -/**
> > - * hid_bpf_get_data - Get the kernel memory pointer associated with the context @ctx
> > - *
> > - * @ctx: The HID-BPF context
> > - * @offset: The offset within the memory
> > - * @rdwr_buf_size: the const size of the buffer
> > - *
> > - * @returns %NULL on error, an %__u8 memory pointer on success
> > - */
> > -__bpf_kfunc __u8 *
> > -hid_bpf_get_data(struct hid_bpf_ctx *ctx, unsigned int offset, const size_t rdwr_buf_size)
> > -{
> > -	struct hid_bpf_ctx_kern *ctx_kern;
> > -
> > -	if (!ctx)
> > -		return NULL;
> 
> [...]