From nobody Mon Feb 9 09:43:33 2026 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 F4073EB64D9 for ; Fri, 7 Jul 2023 16:53:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229643AbjGGQxK (ORCPT ); Fri, 7 Jul 2023 12:53:10 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33472 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233007AbjGGQxG (ORCPT ); Fri, 7 Jul 2023 12:53:06 -0400 Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DB08F2694 for ; Fri, 7 Jul 2023 09:52:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1688748756; x=1720284756; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=9AZoEU1dBDfQPpclAW3AxhTYvcE6HGN/KVZD4GlGeoo=; b=d/94MWC/wkbSzhSnmtqy5gZ/71whsbZAxyYKwWuqvq42/epCEH7Ifmjb O6vAkzc2/R1uguu4CnTsodWb4+Yd5TsewLztAqMLlXiUY9wrQbTtYm7Ub YsTBfTzMyvPSrsrzT7TDfs4jgwuZURehrbUT+Ql6YzOVyteHSTW0QSDXl 0Mp+Zv9PAnlVYwI9LJcATgMQFdqXHRSG9bm9WCe5E3PJWUWNER6NoFPcM 1QeEHWL7lsz0IgkXIiOmJan0WKA3NfZNcGOGu9dEoTIpgRUeZvbmgpfG1 TmvUiu8YszLz2WU72jqNep4sxYVXCN+og6g9GO1mPuD9t0WIE0fYVtAZc g==; X-IronPort-AV: E=McAfee;i="6600,9927,10764"; a="353776318" X-IronPort-AV: E=Sophos;i="6.01,189,1684825200"; d="scan'208";a="353776318" Received: from orsmga006.jf.intel.com ([10.7.209.51]) by orsmga101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Jul 2023 09:52:35 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10764"; a="697290444" X-IronPort-AV: E=Sophos;i="6.01,189,1684825200"; d="scan'208";a="697290444" Received: from fyin-dev.sh.intel.com ([10.239.159.32]) by orsmga006.jf.intel.com with ESMTP; 07 Jul 2023 09:52:33 -0700 From: Yin Fengwei To: linux-mm@kvack.org, linux-kernel@vger.kernel.org, yuzhao@google.com, ryan.roberts@arm.com, shy828301@gmail.com, akpm@linux-foundation.org, willy@infradead.org, david@redhat.com Cc: fengwei.yin@intel.com Subject: [RFC PATCH 1/3] mm: add function folio_in_range() Date: Sat, 8 Jul 2023 00:52:19 +0800 Message-Id: <20230707165221.4076590-2-fengwei.yin@intel.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230707165221.4076590-1-fengwei.yin@intel.com> References: <20230707165221.4076590-1-fengwei.yin@intel.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" It will be used to check whether the folio is mapped to specific VMA and whether the mapping address of folio is in the range. Signed-off-by: Yin Fengwei --- mm/internal.h | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/mm/internal.h b/mm/internal.h index f1276d90484ad..66117523d7d71 100644 --- a/mm/internal.h +++ b/mm/internal.h @@ -585,6 +585,32 @@ extern long faultin_vma_page_range(struct vm_area_stru= ct *vma, bool write, int *locked); extern bool mlock_future_ok(struct mm_struct *mm, unsigned long flags, unsigned long bytes); + +static inline bool +folio_in_range(struct folio *folio, struct vm_area_struct *vma, + unsigned long start, unsigned long end) +{ + pgoff_t pgoff, addr; + unsigned long vma_pglen =3D (vma->vm_end - vma->vm_start) >> PAGE_SHIFT; + + VM_WARN_ON_FOLIO(folio_test_ksm(folio), folio); + if (start < vma->vm_start) + start =3D vma->vm_start; + + if (end > vma->vm_end) + end =3D vma->vm_end; + + pgoff =3D folio_pgoff(folio); + + /* if folio start address is not in vma range */ + if (pgoff < vma->vm_pgoff || pgoff > vma->vm_pgoff + vma_pglen) + return false; + + addr =3D vma->vm_start + ((pgoff - vma->vm_pgoff) << PAGE_SHIFT); + + return ((addr >=3D start) && (addr + folio_size(folio) <=3D end)); +} + /* * mlock_vma_folio() and munlock_vma_folio(): * should be called with vma's mmap_lock held for read or write, --=20 2.39.2