From nobody Sun Feb 8 09:32:34 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 F0A50C7EE29 for ; Fri, 9 Jun 2023 01:23:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237614AbjFIBX1 (ORCPT ); Thu, 8 Jun 2023 21:23:27 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39586 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229931AbjFIBXZ (ORCPT ); Thu, 8 Jun 2023 21:23:25 -0400 Received: from mail-yw1-x1134.google.com (mail-yw1-x1134.google.com [IPv6:2607:f8b0:4864:20::1134]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A694F18D for ; Thu, 8 Jun 2023 18:23:24 -0700 (PDT) Received: by mail-yw1-x1134.google.com with SMTP id 00721157ae682-565c7399afaso11693017b3.1 for ; Thu, 08 Jun 2023 18:23:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20221208; t=1686273804; x=1688865804; h=mime-version:references:message-id:in-reply-to:subject:cc:to:from :date:from:to:cc:subject:date:message-id:reply-to; bh=3KTDoQQSpcjB9NQiyOQFUXOX88v07BrrKabYvpMIx6w=; b=PhwpDxcjLXiR7MGVaWKfABLE3dmRB3qka2k6U1l+muDGzWLhomU4qiQ57KmT6VH8qY ACB3DayhC4faseiipd0QCNLUtNtuFH3XTvyWMyC+FvmNiYj2hTBmc8pdfyd4XFmOfbWU tZooxmyCXH+STIuVMaRhFjnJtSpEto0Mxch6xRdf+bo4VO2G6a/c8gheC2mOEmzSx5zk ccYQOeUWSm1v0s9lMRW9nRmwt5CbXGDSvPCaqv/QLtUPzWt0If7EQ4o8TmUAMcKVROe3 I5HEpFf63MgdvN7DdkYJ8qdg2z230og4tgBl+c7UnWgkZm/cRQnWkzi++q5rmkDVXcaG 0vug== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1686273804; x=1688865804; h=mime-version:references:message-id:in-reply-to:subject:cc:to:from :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=3KTDoQQSpcjB9NQiyOQFUXOX88v07BrrKabYvpMIx6w=; b=GiZd0qIQHOl9r87QXH+ZzsjIRWiv+KvxNhYDHhmgudyKY22riOcjdH3NFHbUdJD/SC 3jg/7wMfqW9hKKhIgzUvde/s9fG3pj39i/HCdw4FEfYUv03qHXVxCqS9DOhYnD20bXBs Ccth8W1bMF4xm0s+mtcvuCaIzjVv5ii1QShydMK60JDjmSALoAbd1c4SnRGiJ5DTrg2A bcr8anlJasdgiBp8wrc1747ZLZH9IoDdPFxyBhHtNCCPjTMIHX6fzO/9Rd+Y4GIpfzrf XxMXoei1MN3D1sJKckPrL0QHpx9UYnM34Nx83hD7XvlkYShA8i/NxuOLfYixT6bwWPnV ySMA== X-Gm-Message-State: AC+VfDxr8usE8FyZufSo6SSZXNUpodEWKNsI8b7L+KdektYVD8M2hOVG pj7+jsCxNDdOkaPwnyX/w1Cu8g== X-Google-Smtp-Source: ACHHUZ5Qxg9qOQctVm9TDBIrvRBwWLkj4+fag3kdEXz2orEpq2AOsjXF+B86JD9LcmOUKUNihoCjxw== X-Received: by 2002:a81:6743:0:b0:568:f9f0:b057 with SMTP id b64-20020a816743000000b00568f9f0b057mr1198700ywc.26.1686273803806; Thu, 08 Jun 2023 18:23:23 -0700 (PDT) Received: from ripple.attlocal.net (172-10-233-147.lightspeed.sntcca.sbcglobal.net. [172.10.233.147]) by smtp.gmail.com with ESMTPSA id i11-20020a0ddf0b000000b00568ab5dd873sm288724ywe.65.2023.06.08.18.23.20 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 08 Jun 2023 18:23:23 -0700 (PDT) Date: Thu, 8 Jun 2023 18:23:19 -0700 (PDT) From: Hugh Dickins X-X-Sender: hugh@ripple.attlocal.net To: Andrew Morton cc: Mike Kravetz , Mike Rapoport , "Kirill A. Shutemov" , Matthew Wilcox , David Hildenbrand , Suren Baghdasaryan , Qi Zheng , Yang Shi , Mel Gorman , Peter Xu , Peter Zijlstra , Will Deacon , Yu Zhao , Alistair Popple , Ralph Campbell , Ira Weiny , Steven Price , SeongJae Park , Lorenzo Stoakes , Huang Ying , Naoya Horiguchi , Christophe Leroy , Zack Rusin , Jason Gunthorpe , Axel Rasmussen , Anshuman Khandual , Pasha Tatashin , Miaohe Lin , Minchan Kim , Christoph Hellwig , Song Liu , Thomas Hellstrom , Ryan Roberts , linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH v2 13/32] mm/hmm: retry if pte_offset_map() fails In-Reply-To: Message-ID: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" hmm_vma_walk_pmd() is called through mm_walk, but already has a goto again loop of its own, so take part in that if pte_offset_map() fails. Signed-off-by: Hugh Dickins Reviewed-by: Alistair Popple --- mm/hmm.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/mm/hmm.c b/mm/hmm.c index e23043345615..b1a9159d7c92 100644 --- a/mm/hmm.c +++ b/mm/hmm.c @@ -381,6 +381,8 @@ static int hmm_vma_walk_pmd(pmd_t *pmdp, } =20 ptep =3D pte_offset_map(pmdp, addr); + if (!ptep) + goto again; for (; addr < end; addr +=3D PAGE_SIZE, ptep++, hmm_pfns++) { int r; =20 --=20 2.35.3