From nobody Mon Oct 6 19:11:46 2025 Received: from cstnet.cn (smtp21.cstnet.cn [159.226.251.21]) (using TLSv1.2 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2058223ABA1; Fri, 18 Jul 2025 07:27:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=159.226.251.21 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1752823662; cv=none; b=IqsvXRdtsQxcvcWNG0XsDqyWcWntQKOfVM7Xy1VgF0A+aAQqIrZVYVzlpJ8J29+IUDfyUWPOLOVyMeBmXcm9SFfBBYpCOF+I+c/AQ3ERyKzyqglJXzmHsPIAtNSZqQgerrzRiuX8y8Y/NMiOETQtw8AFR3SStxu+8sualCa6m5E= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1752823662; c=relaxed/simple; bh=Uk913nRYxtdWy7tNJm0iREa7rDTujjAsVU7LsKuv6r4=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=AQhFjAn0fJkUvP4SEP2ED5jjCXH5W7hzXtRDtolyxkHGSYWrnBMDW7nOiIk7B21TTSDyxQeV1mqG3dsznTe0DYhBkLFLHkq7MCtslYucn2ebHS09yc3brFFGtPlmT+p0m3ilpkYrWf+0u5jKH/thhc9YGGuohIrKcJy2/DL8iUA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=iscas.ac.cn; spf=pass smtp.mailfrom=iscas.ac.cn; arc=none smtp.client-ip=159.226.251.21 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=iscas.ac.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=iscas.ac.cn Received: from ubt.. (unknown [210.73.43.2]) by APP-01 (Coremail) with SMTP id qwCowADnD6RT93loK4wdBQ--.27021S5; Fri, 18 Jul 2025 15:27:29 +0800 (CST) From: Chunyan Zhang To: Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Charlie Jenkins , Song Liu , Yu Kuai Cc: linux-riscv@lists.infradead.org, linux-raid@vger.kernel.org, linux-kernel@vger.kernel.org, Chunyan Zhang Subject: [PATCH V3 3/5] raid6: riscv: Prevent compiler with vector support to build already vectorized code Date: Fri, 18 Jul 2025 15:27:09 +0800 Message-Id: <20250718072711.3865118-4-zhangchunyan@iscas.ac.cn> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250718072711.3865118-1-zhangchunyan@iscas.ac.cn> References: <20250718072711.3865118-1-zhangchunyan@iscas.ac.cn> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: qwCowADnD6RT93loK4wdBQ--.27021S5 X-Coremail-Antispam: 1UD129KBjvdXoWruFy3CFyrJr4UZF1rKrW5GFg_yoW3Jrg_AF 1FkF1xJFykCFs2v39IyFZ8u3s5Zws0qF18XF97tw13Xry8Za4Y9a9Ivrn5ZFy0qrW7ZFsI qrn8JFWIyw1q9jkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUb98YjsxI4VWxJwAYFVCjjxCrM7AC8VAFwI0_Wr0E3s1l1xkIjI8I 6I8E6xAIw20EY4v20xvaj40_Wr0E3s1l1IIY67AEw4v_Jr0_Jr4l82xGYIkIc2x26280x7 IE14v26r1rM28IrcIa0xkI8VCY1x0267AKxVW5JVCq3wA2ocxC64kIII0Yj41l84x0c7CE w4AK67xGY2AK021l84ACjcxK6xIIjxv20xvE14v26ryj6F1UM28EF7xvwVC0I7IYx2IY6x kF7I0E14v26F4j6r4UJwA2z4x0Y4vEx4A2jsIE14v26rxl6s0DM28EF7xvwVC2z280aVCY 1x0267AKxVW0oVCq3wAS0I0E0xvYzxvE52x082IY62kv0487Mc02F40EFcxC0VAKzVAqx4 xG6I80ewAv7VC0I7IYx2IY67AKxVWUXVWUAwAv7VC2z280aVAFwI0_Gr0_Cr1lOx8S6xCa FVCjc4AY6r1j6r4UM4x0Y48IcxkI7VAKI48JM4IIrI8v6xkF7I0E8cxan2IY04v7MxkF7I 0En4kS14v26r1q6r43MxkIecxEwVAFwVW8CwCF04k20xvY0x0EwIxGrwCFx2IqxVCFs4IE 7xkEbVWUJVW8JwC20s026c02F40E14v26r1j6r18MI8I3I0E7480Y4vE14v26r106r1rMI 8E67AF67kF1VAFwI0_Jw0_GFylIxkGc2Ij64vIr41lIxAIcVC0I7IYx2IY67AKxVWUJVWU CwCI42IY6xIIjxv20xvEc7CjxVAFwI0_Gr0_Cr1lIxAIcVCF04k26cxKx2IYs7xG6r1j6r 1xMIIF0xvEx4A2jsIE14v26r1j6r4UMIIF0xvEx4A2jsIEc7CjxVAFwI0_Gr0_Gr1UYxBI daVFxhVjvjDU0xZFpf9x07jOF4_UUUUU= X-CM-SenderInfo: x2kd0wxfkx051dq6x2xfdvhtffof0/1tbiBgoHB2h50BWMfQAAsp Content-Type: text/plain; charset="utf-8" To avoid the inline assembly code to break what the compiler could have vectorized, this code must be built without compiler support for vector. Signed-off-by: Chunyan Zhang --- lib/raid6/rvv.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/lib/raid6/rvv.c b/lib/raid6/rvv.c index 89da5fc247aa..015f3ee4da25 100644 --- a/lib/raid6/rvv.c +++ b/lib/raid6/rvv.c @@ -20,6 +20,10 @@ static int rvv_has_vector(void) return has_vector(); } =20 +#ifdef __riscv_vector +#error "This code must be built without compiler support for vector" +#endif + static void raid6_rvv1_gen_syndrome_real(int disks, unsigned long bytes, v= oid **ptrs) { u8 **dptr =3D (u8 **)ptrs; --=20 2.34.1