From nobody Fri Dec 19 07:18:08 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 6B112C04AA5 for ; Thu, 25 Aug 2022 10:12:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241092AbiHYKMI (ORCPT ); Thu, 25 Aug 2022 06:12:08 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58008 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240998AbiHYKMB (ORCPT ); Thu, 25 Aug 2022 06:12:01 -0400 Received: from mail-pl1-x629.google.com (mail-pl1-x629.google.com [IPv6:2607:f8b0:4864:20::629]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 47208A7A82 for ; Thu, 25 Aug 2022 03:11:49 -0700 (PDT) Received: by mail-pl1-x629.google.com with SMTP id p13so6736883pld.6 for ; Thu, 25 Aug 2022 03:11:49 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance-com.20210112.gappssmtp.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc; bh=5x32MEDCgaNmHcojCpTje6cvDrY80Yxg7sYtN2i0CQc=; b=Te/5IP11Lj2J2v23eu1UQFcoUwv4dykJGHh99WiFfsij/0Rki7IrrrZUo2uCyGFclm KhwIUXnn/hCKxxGZSDmvctNWutsnfG2jiFI6EDBMTtnQjsqUp8zty5btb0T2U1eMYaAw ZVGUNnbi1YLmhRT0hSrmnwApJbI2JEFFLm4Yz/v7Ft2oQvMGdrYASN7qLEC84irUpsWv 2BDeF6FZ7a0sXvUOV84T7gAfIJ4GiTQhwC0IvEgp5Rl+atGvYh3T4qDETv2PIwGprzon T94RtbPTcLwAJjd733YMYjkH9R1j/Sboj7Ln2UWI1Ee7eUSezRk7pfGK6VaMatgi1JCf DWLg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc; bh=5x32MEDCgaNmHcojCpTje6cvDrY80Yxg7sYtN2i0CQc=; b=75yhL6T7QkdvwsIZOtm6CnhzgwSiVHDfCa+h3pdCdkOjZJN1X/cx6fvF2ZPkVDY3Zn upNVmsfmOYKhBfZ1Gl+RfRc6jIcojCTxbGLrwwdg0SFBK04f9+5nQs2qngqCTOEh+f9A 9JSiATRgWQGFhZq0r8/bZTbumADmgwa2JtUG/GV7+ky7UFGvzK3kUfHAnXCxjLdfHR3R cap4Icp6zzorMav9kAZSrxT51Zf6Dca7Q0MSDm7HJ0247HL60k0OGAQgrTN+Ro/gvnjY k+HubSiJs0Be7N4R2S/+9MtWOz1n/5tG8GJ66am/iQpwp/HjLC18fyzciPEMuZrmLyUM 8ebA== X-Gm-Message-State: ACgBeo2+s02uUCmZvqBmxhry64f5K5cJ4rtm6ZBN3E2okGkU240JfeRB dTJIEEchBeiJ/vOjURkDRg6Ynw== X-Google-Smtp-Source: AA6agR7hp40eC3wRY8MGPaoNXwGLwbdIDjNQybY0ITEEfTLXjmMgba4xFQhcMKQZ1dlMtlSOnHbvOg== X-Received: by 2002:a17:902:d2c5:b0:172:8d5f:bf01 with SMTP id n5-20020a170902d2c500b001728d5fbf01mr3089264plc.119.1661422308812; Thu, 25 Aug 2022 03:11:48 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([139.177.225.234]) by smtp.gmail.com with ESMTPSA id b10-20020a170903228a00b001714c36a6e7sm8477581plh.284.2022.08.25.03.11.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 25 Aug 2022 03:11:47 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@redhat.com, kirill.shutemov@linux.intel.com, mika.penttila@nextfour.com, jgg@nvidia.com, tglx@linutronix.de, willy@infradead.org Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, muchun.song@linux.dev, Qi Zheng Subject: [RFC PATCH 3/7] mm: add pte_to_page() helper Date: Thu, 25 Aug 2022 18:10:33 +0800 Message-Id: <20220825101037.96517-4-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20220825101037.96517-1-zhengqi.arch@bytedance.com> References: <20220825101037.96517-1-zhengqi.arch@bytedance.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Add pte_to_page() helper similar to pmd_to_page(), which will be used to get the struct page of the PTE page table. Signed-off-by: Qi Zheng --- include/linux/pgtable.h | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/include/linux/pgtable.h b/include/linux/pgtable.h index 9745684b0cdb..c4a6bda6e965 100644 --- a/include/linux/pgtable.h +++ b/include/linux/pgtable.h @@ -86,6 +86,14 @@ static inline unsigned long pud_index(unsigned long addr= ess) #define pgd_index(a) (((a) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1)) #endif =20 +#ifdef CONFIG_FREE_USER_PTE +static inline struct page *pte_to_page(pte_t *pte) +{ + unsigned long mask =3D ~(PTRS_PER_PTE * sizeof(pte_t) - 1); + return virt_to_page((void *)((unsigned long) pte & mask)); +} +#endif + #ifndef pte_offset_kernel static inline pte_t *pte_offset_kernel(pmd_t *pmd, unsigned long address) { --=20 2.20.1