From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A983931F989; Tue, 28 Apr 2026 20:35:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777408556; cv=none; b=hI5Dqd/3MBZ6iIeISf0SnffJE4OCREk33u2ptCWDH9+U1iRJVk7qH0lyu4BWSc5+JtI1/CtjRzuo0tzPS2WfOY0wdV0Eo+g1gAiz/ILtD+IihNM+Pz7DsILk0CjU859UaEM5dcHFIPokGRIWeIvobUJ+B7znUfANfpgrmn86WdM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777408556; c=relaxed/simple; bh=AQngPuZF6lq8G9fCGomGHL+AWI1T6dVXUsOnqMkMhEU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=EHpTWOBAYsH6WlTU5EMla2Djdb45OC1IIo6SOfFpasP14KRT0pCH4FrpbmrDFIc2QY0oOLpu08Q0OS2gjG/6U3TVBvptAb6hB6RD6MR/zPLaoxc5lw2mcna9QU4S9fSU/ocK7OWEzMndwvCmHsU/HEK9Alovq8QPmou8dOw57tU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=dFRqoipZ; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="dFRqoipZ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4CB36C2BCB3; Tue, 28 Apr 2026 20:35:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1777408556; bh=AQngPuZF6lq8G9fCGomGHL+AWI1T6dVXUsOnqMkMhEU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=dFRqoipZ/EB+YgCSOi8/4R4q0p4Rl9fO1rbxD0Mcc79k99NlpsRfsCceQrZvru5+f MDgJhwXE9QF2MJe0VX6jfHJ4uhnefroLczSe5XneMjcQbkMRsTU88/6Sj/uAbdQZC1 7tWXmr1CdFZ8EjXZVF3RPTCe+KzpttLMTWdMRCb5jWLQ0lOQ/doeQf6UTtLPHbOR2N yfMAJpUqxaEzOcroCcdUBq2WNo/987S8UaP7J5FXc3pKVbtU7IIpAIdKSVPHaJLx0D P+Yl3oukx2CdOx3flaUWLEqKhhuo9B52Xe/gZCsiN90EOXOj034hGQI5j///PgrgF3 VVHY2VSC8ylpQ== From: Tejun Heo To: David Vernet , Andrea Righi , Changwoo Min Cc: sched-ext@lists.linux.dev, Emil Tsalapatis , linux-kernel@vger.kernel.org, Tejun Heo , Cheng-Yang Chou Subject: [PATCH 09/17] tools/sched_ext: Add struct_size() helpers to common.bpf.h Date: Tue, 28 Apr 2026 10:35:37 -1000 Message-ID: <20260428203545.181052-10-tj@kernel.org> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260428203545.181052-1-tj@kernel.org> References: <20260428203545.181052-1-tj@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Add flex_array_size(), struct_size() and struct_size_t() to scx/common.bpf.h so BPF schedulers can size flex-array-containing structs the same way kernel code does. These are abbreviated forms of the macros. v3: Use offsetof() instead of sizeof() in struct_size() to match kernel semantics (no inflation from trailing struct padding). (Sashiko) Signed-off-by: Tejun Heo Reviewed-by: Cheng-Yang Chou --- tools/sched_ext/include/scx/common.bpf.h | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/tools/sched_ext/include/scx/common.bpf.h b/tools/sched_ext/include/scx/common.bpf.h index 18f823d424cc..087ae4f79c60 100644 --- a/tools/sched_ext/include/scx/common.bpf.h +++ b/tools/sched_ext/include/scx/common.bpf.h @@ -1043,6 +1043,16 @@ static inline u64 scx_clock_irq(u32 cpu) return irqt ? BPF_CORE_READ(irqt, total) : 0; } +/* Abbreviated forms of 's struct_size() family. */ +#define flex_array_size(p, member, count) \ + ((count) * sizeof(*(p)->member)) + +#define struct_size(p, member, count) \ + (offsetof(typeof(*(p)), member) + flex_array_size(p, member, count)) + +#define struct_size_t(type, member, count) \ + struct_size((type *)NULL, member, count) + #include "compat.bpf.h" #include "enums.bpf.h" -- 2.54.0