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Fri, 17 Jul 2026 13:32:22 +0000 (GMT) Received: from tuxmaker.boeblingen.de.ibm.com (unknown [9.87.85.9]) by smtpav02.fra02v.mail.ibm.com (Postfix) with SMTP; Fri, 17 Jul 2026 13:32:22 +0000 (GMT) Received: by tuxmaker.boeblingen.de.ibm.com (Postfix, from userid 55669) id 993F916274C; Fri, 17 Jul 2026 15:32:22 +0200 (CEST) From: Alexander Gordeev To: Kevin Brodsky , David Hildenbrand , Chris Li , Gerald Schaefer , Heiko Carstens , Christian Borntraeger , Claudio Imbrenda Cc: linux-s390@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-sparse@vger.kernel.org Subject: [RFC PATCH 1/4] mm: use proper PTE accessors in madvise() and mremap() Date: Fri, 17 Jul 2026 15:32:19 +0200 Message-ID: <3c4d3c768ebf9cc7bbc7667e0e08bf5ad2fe8729.1784292223.git.agordeev@linux.ibm.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: References: 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-TM-AS-GCONF: 00 X-Proofpoint-Spam-Info: AW1haW4tMjYwNzE3MDEzNCBTYWx0ZWRfX9kTvVNcz5Jmo Pl3Z3eyavgj3VadKxtd+RD+oh/mU1JqXDFG0N53D3VIBNBKOcvxeaVQLtkyE6V0rApGcYpSzYuJ G1xHo80wT776IJw0+74E42/G4EHswSg= X-Authority-Analysis: v=2.4 cv=Mp1iLWae c=1 sm=1 tr=0 ts=6a5a2eec cx=c_pps a=3Bg1Hr4SwmMryq2xdFQyZA==:117 a=3Bg1Hr4SwmMryq2xdFQyZA==:17 a=RAioF0-LDSMA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=uAbxVGIbfxUO_5tXvNgY:22 a=VnNF1IyMAAAA:8 a=qew0nP0EAHuLvkb_oQEA:9 X-Proofpoint-GUID: iDaEB2JQJhBC3xsyEdq_VH2SQVaRtzO_ X-Proofpoint-ORIG-GUID: iDaEB2JQJhBC3xsyEdq_VH2SQVaRtzO_ X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNzE3MDEzNCBTYWx0ZWRfXy0sIwPc2aB4/ dq4yFvqPqzzSQA1rjXzofJrLQbIAgPtHG4loanaLFSFUtqJ9VyF1nap1yGs8FzJ/l40QRhFHA8v 46EySlpFNmLJy0Wuzbd8As+LczdjMQMWmyMp46MIuO3awjuuQd0OGSI2uIptoLWnhWstDgHPece kniOX0XSUMx5gz6KAZ3XCqVmVBzt1LMCItkCDnnAnuHbWmMelJxsbuFS/fQ5sj72sxJa0x4jQvC WNqvlVaQVvaf+Pxjxe4I6nOpJdKmifrDoo8Um/AULY9PvMZe66HFViAx83WMmKXX7MDksAsHzU/ 6okHfXih2CaBXzDWHDRTAwo6L0QK1PyLsuT/Au1xE31YKHG7FQxBsEjuBPN/OzXAPuK68LhF8Ai Cc3xnVPm3brph2gAS6/LHUglbpcGQTqDb+0aEOwxdqrEp/YpESZKj+11hLSpts2VgSmKnLcmBEW cenaUk28fAsX+21YlmQ== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-07-17_03,2026-07-17_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 bulkscore=0 spamscore=0 malwarescore=0 lowpriorityscore=0 impostorscore=0 priorityscore=1501 suspectscore=0 clxscore=1011 phishscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2607170134 Follow the pattern established by commit c33c794828f2 ("mm: ptep_get() conversion") and use proper accessors instead of direct pointer dereferences. Signed-off-by: Alexander Gordeev --- mm/madvise.c | 2 +- mm/mremap.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/mm/madvise.c b/mm/madvise.c index 77552b03d318..7d369b1ff8e5 100644 --- a/mm/madvise.c +++ b/mm/madvise.c @@ -1106,7 +1106,7 @@ static int guard_install_set_pte(unsigned long addr= , unsigned long next, unsigned long *nr_pages =3D (unsigned long *)walk->private; =20 /* Simply install a PTE marker, this causes segfault on access. */ - *ptep =3D make_pte_marker(PTE_MARKER_GUARD); + set_pte(ptep, make_pte_marker(PTE_MARKER_GUARD)); (*nr_pages)++; =20 return 0; diff --git a/mm/mremap.c b/mm/mremap.c index e9c8b1d05832..fc3b90274a57 100644 --- a/mm/mremap.c +++ b/mm/mremap.c @@ -264,7 +264,7 @@ static int move_ptes(struct pagetable_move_control *p= mc, =20 for (; old_addr < old_end; old_ptep +=3D nr_ptes, old_addr +=3D nr_ptes= * PAGE_SIZE, new_ptep +=3D nr_ptes, new_addr +=3D nr_ptes * PAGE_SIZE) { - VM_WARN_ON_ONCE(!pte_none(*new_ptep)); + VM_WARN_ON_ONCE(!pte_none(ptep_get(new_ptep))); =20 nr_ptes =3D 1; max_nr_ptes =3D (old_end - old_addr) >> PAGE_SHIFT; --=20 2.53.0