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Date: Fri, 24 Apr 2026 16:54:45 +0200
From: Benjamin Tissoires <bentiss@kernel.org>
To: Alexei Starovoitov <alexei.starovoitov@gmail.com>
Cc: Zhao Mengmeng <zhaomzhao@126.com>, Jiri Kosina <jikos@kernel.org>, 
	linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, bpf@vger.kernel.org, 
	Zhao Mengmeng <zhaomengmeng@kylinos.cn>
Subject: Re: [PATCH] HID: bpf: Sync KF_SLEEPABLE flags in
 hid_bpf_syscall_kfuncs set
Message-ID: <aeuDkTryZfgjzdcS@beelink>
References: <20260424-btf-define-v1-1-0f52dffad5aa@kylinos.cn>
 <DI1FOWOLC37Y.3DK99VJZDMWKI@gmail.com>
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In-Reply-To: <DI1FOWOLC37Y.3DK99VJZDMWKI@gmail.com>

On Apr 24 2026, Alexei Starovoitov wrote:
> On Fri Apr 24, 2026 at 3:22 AM PDT, Zhao Mengmeng wrote:
> > From: Zhao Mengmeng <zhaomengmeng@kylinos.cn>
> >
> > Pahole intersects flags across BTF_ID_FLAGS() occurrences, so omitting
> > KF_SLEEPABLE may drops the flags globally. sync this flags in
> > hid_bpf_syscall_kfuncs set to enforce consistency and safety.
> 
> Makes no sense.
> These kfuncs are not sleepable.

I'm not sure I parse correctly the reason for the dropping of the flags
by pahole, but all of those kfuncs are actually sleepable, except for
hid_bpf_input_report, which is *not* sleepable.

Cheers,
Benjamin