From nobody Fri Sep 5 10:38:47 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7F29EEB64DA for ; Tue, 18 Jul 2023 06:58:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231472AbjGRG6F (ORCPT ); Tue, 18 Jul 2023 02:58:05 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54188 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230091AbjGRG6C (ORCPT ); Tue, 18 Jul 2023 02:58:02 -0400 Received: from dggsgout12.his.huawei.com (unknown [45.249.212.56]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1CAC41AC for ; Mon, 17 Jul 2023 23:57:57 -0700 (PDT) Received: from mail02.huawei.com (unknown [172.30.67.143]) by dggsgout12.his.huawei.com (SkyGuard) with ESMTP id 4R4qWy6nB4z4f3mKq for ; Tue, 18 Jul 2023 14:57:34 +0800 (CST) Received: from huaweicloud.com (unknown [10.175.124.27]) by APP2 (Coremail) with SMTP id Syh0CgB3a+nfN7Zk36ikOA--.34217S3; Tue, 18 Jul 2023 14:57:37 +0800 (CST) From: Kemeng Shi To: akpm@linux-foundation.org, pasha.tatashin@soleen.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org Cc: shikemeng@huaweicloud.com Subject: [PATCH 1/3] mm/page_ext: add common function to get client data from page_ext Date: Tue, 18 Jul 2023 22:58:10 +0800 Message-Id: <20230718145812.1991717-2-shikemeng@huaweicloud.com> X-Mailer: git-send-email 2.30.0 In-Reply-To: <20230718145812.1991717-1-shikemeng@huaweicloud.com> References: <20230718145812.1991717-1-shikemeng@huaweicloud.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: Syh0CgB3a+nfN7Zk36ikOA--.34217S3 X-Coremail-Antispam: 1UD129KBjvdXoWruF48ZF1kJFy3AF1Uur13CFg_yoWfZwc_Aw 1xtr48Gr1IvF9avw1UKw1xtFy5t3y8Gr47XF1ktrZ0yrnrKrs0ya18JasxXw4kWr1fXr9r Ca1kWrnrtr17ujkaLaAFLSUrUUUUUb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUb6AFF20E14v26r4j6ryUM7CY07I20VC2zVCF04k26cxKx2IYs7xG 6rWj6s0DM7CIcVAFz4kK6r1j6r18M280x2IEY4vEnII2IxkI6r1a6r45M28IrcIa0xkI8V A2jI8067AKxVWUGwA2048vs2IY020Ec7CjxVAFwI0_Jrv_JF4l8cAvFVAK0II2c7xJM28C jxkF64kEwVA0rcxSw2x7M28EF7xvwVC0I7IYx2IY67AKxVWDJVCq3wA2z4x0Y4vE2Ix0cI 8IcVCY1x0267AKxVW8Jr0_Cr1UM28EF7xvwVC2z280aVAFwI0_GcCE3s1l84ACjcxK6I8E 87Iv6xkF7I0E14v26rxl6s0DM2AIxVAIcxkEcVAq07x20xvEncxIr21l5I8CrVACY4xI64 kE6c02F40Ex7xfMcIj6xIIjxv20xvE14v26r1j6r18McIj6I8E87Iv67AKxVWUJVW8JwAm 72CE4IkC6x0Yz7v_Jr0_Gr1lF7xvr2IYc2Ij64vIr41lF7I21c0EjII2zVCS5cI20VAGYx C7MxAIw28IcxkI7VAKI48JMxC20s026xCaFVCjc4AY6r1j6r4UMI8I3I0E5I8CrVAFwI0_ Jr0_Jr4lx2IqxVCjr7xvwVAFwI0_JrI_JrWlx4CE17CEb7AF67AKxVWUAVWUtwCIc40Y0x 0EwIxGrwCI42IY6xIIjxv20xvE14v26r1j6r1xMIIF0xvE2Ix0cI8IcVCY1x0267AKxVWU JVW8JwCI42IY6xAIw20EY4v20xvaj40_Jr0_JF4lIxAIcVC2z280aVAFwI0_Jr0_Gr1lIx AIcVC2z280aVCY1x0267AKxVW8JVW8JrUvcSsGvfC2KfnxnUUI43ZEXa7sRiDGYDUUUUU= = X-CM-SenderInfo: 5vklyvpphqwq5kxd4v5lfo033gof0z/ X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Add common page_ext_data function to get client data. This could hide offset which is auto generated in page_ext core and expose the desgin of page_ext data layout. Signed-off-by: Kemeng Shi --- include/linux/page_ext.h | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/include/linux/page_ext.h b/include/linux/page_ext.h index 8dd21d87e0da..be98564191e6 100644 --- a/include/linux/page_ext.h +++ b/include/linux/page_ext.h @@ -81,6 +81,12 @@ static inline void page_ext_init(void) extern struct page_ext *page_ext_get(struct page *page); extern void page_ext_put(struct page_ext *page_ext); =20 +static inline void *page_ext_data(struct page_ext *page_ext, + struct page_ext_operations *ops) +{ + return (void *)(page_ext) + ops->offset; +} + static inline struct page_ext *page_ext_next(struct page_ext *curr) { void *next =3D curr; --=20 2.30.0