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Mon, 09 Nov 2026 08:50:59 -0800 (PST) Received: from mail.gmail.com ([2a04:ee41:4:b2de:1ac0:4dff:fe0f:3782]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-49597b2066esm11035695f8f.52.2026.11.09.08.50.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 09 Nov 2026 08:50:59 -0800 (PST) Date: Mon, 9 Nov 2026 17:02:32 +0000 From: Anton Protopopov To: Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , Eduard Zingerman , Kumar Kartikeya Dwivedi , Alan Maguire , John Fastabend , Quentin Monnet , Christian Brauner , KP Singh , Yonghong Song , Jiri Olsa , Emil Tsalapatis , Ihor Solodrai , Sasha Levin , bpf@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v1 bpf-next 01/18] bpf: Add BTF ID sets for fmod_ret targets Message-ID: References: <20261106210314.1767267-1-a.s.protopopov@gmail.com> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20261106210314.1767267-1-a.s.protopopov@gmail.com> On 26/11/06 09:02PM, Anton Protopopov wrote: > Add BTF_SET8_FMODRET and the BTF_FMODRET_START() and BTF_FMODRET_END() > macros to declare the functions BPF fmod_ret programs may attach to. > They work like kfunc sets: each entry is a BTF_ID_FLAGS() line and > KF_SLEEPABLE marks targets sleepable programs may attach to. > > Teach resolve_btfids to find these sets and tag every listed function in > BTF with a "bpf_fmodret" decl tag, plus "bpf_fmodret_sleepable" when > KF_SLEEPABLE is set. The sleepable tag never comes without "bpf_fmodret" > and readers of the tags may rely on that. Share the set walk with the > kfunc collection. Any other flag is an error. Nothing in the code refers > to the sets, so keep .BTF_ids in the linker script, or --gc-sections may > discard them. going to send v2 to address robots comments + rebase (latest merge broke CI for me)