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Mon, 27 Apr 2026 05:20:00 +0000 (GMT) Received: from tuxmaker.boeblingen.de.ibm.com (unknown [9.87.85.9]) by smtpav06.fra02v.mail.ibm.com (Postfix) with SMTP; Mon, 27 Apr 2026 05:20:00 +0000 (GMT) Received: by tuxmaker.boeblingen.de.ibm.com (Postfix, from userid 55669) id B7C87E066F; Mon, 27 Apr 2026 07:20:00 +0200 (CEST) From: Alexander Gordeev To: Andrew Morton , David Hildenbrand , Lorenzo Stoakes Cc: Gerald Schaefer , Heiko Carstens , Vasily Gorbik , linux-s390@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: [PATCH] mm/page_vma_mapped_walk: add missing pgtable entry accessors Date: Mon, 27 Apr 2026 07:20:00 +0200 Message-ID: <20260427052000.196402-1-agordeev@linux.ibm.com> X-Mailer: git-send-email 2.51.0 Precedence: bulk X-Mailing-List: linux-s390@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-GUID: KLWXsFStS9wxIe74e9wlHShCUGR159aI X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNDI3MDA1NCBTYWx0ZWRfX6pdaSSR0sFra 2C2qDgF7ggAvahOz4etl+xbC5UdXzVr+dxqD5A2hHywN5ncaCSDF68YLabuwl/JX+xSpUwKXCgs m4I92f6BgzzOb9PSXacdx3JJLS/Ecf0KHHYy84BuemPRTce+rebYaKh9MN5hbrcSVLb4z/vjwJN nQhqj64oVuB1bB8O2HJcEmjezgTtnLg/vqg5N0nv4QjTiP5w13+SkHk94wpfJECvvIbIlrVNbd2 hKM30dfNaBanKEaF9PpSxGKSLOz9hb6zEoYb18FZGIZcryroQdmrvf0ffVODh4SkDgQfhD+wt9Q 4EOsHb7VZG2bEariAM2yFxpzyvyw8LNopcOqI7Eu+P6+8JgaBTyFjpZ+Hh+1obUkooVztelFUTn K465lnGTpT2EVC3nj2M9p+hBNeKo5oVvWhx14uOYHqzI2a3j05OYOj1F08OXkludDE45Nes9jj9 W0Xsw/Xb+PYh5Dn6ekg== X-Authority-Analysis: v=2.4 cv=Kc7idwYD c=1 sm=1 tr=0 ts=69eef206 cx=c_pps a=5BHTudwdYE3Te8bg5FgnPg==:117 a=5BHTudwdYE3Te8bg5FgnPg==:17 a=A5OVakUREuEA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=uAbxVGIbfxUO_5tXvNgY:22 a=VnNF1IyMAAAA:8 a=WjDiwf2ghD9uJ69bLr8A:9 X-Proofpoint-ORIG-GUID: KLWXsFStS9wxIe74e9wlHShCUGR159aI X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-04-27_01,2026-04-21_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1011 phishscore=0 bulkscore=0 adultscore=0 spamscore=0 malwarescore=0 impostorscore=0 priorityscore=1501 lowpriorityscore=0 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2604200000 definitions=main-2604270054 Convert pgtable direct entry dereferences to the corresponding pXdp_get() accessors. Use ptep_get_lockless() variant for PTE reads when no lock is taken. Signed-off-by: Alexander Gordeev --- mm/page_vma_mapped.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/mm/page_vma_mapped.c b/mm/page_vma_mapped.c index b38a1d00c971..a4520bb10d2a 100644 --- a/mm/page_vma_mapped.c +++ b/mm/page_vma_mapped.c @@ -41,7 +41,7 @@ static bool map_pte(struct page_vma_mapped_walk *pvmw, = pmd_t *pmdvalp, if (!pvmw->pte) return false; =20 - ptent =3D ptep_get(pvmw->pte); + ptent =3D ptep_get_lockless(pvmw->pte); =20 if (pte_none(ptent)) { return false; @@ -219,17 +219,17 @@ bool page_vma_mapped_walk(struct page_vma_mapped_wa= lk *pvmw) restart: do { pgd =3D pgd_offset(mm, pvmw->address); - if (!pgd_present(*pgd)) { + if (!pgd_present(pgdp_get(pgd))) { step_forward(pvmw, PGDIR_SIZE); continue; } p4d =3D p4d_offset(pgd, pvmw->address); - if (!p4d_present(*p4d)) { + if (!p4d_present(p4dp_get(p4d))) { step_forward(pvmw, P4D_SIZE); continue; } pud =3D pud_offset(p4d, pvmw->address); - if (!pud_present(*pud)) { + if (!pud_present(pudp_get(pud))) { step_forward(pvmw, PUD_SIZE); continue; } @@ -244,7 +244,7 @@ bool page_vma_mapped_walk(struct page_vma_mapped_walk= *pvmw) =20 if (pmd_trans_huge(pmde) || pmd_is_migration_entry(pmde)) { pvmw->ptl =3D pmd_lock(mm, pvmw->pmd); - pmde =3D *pvmw->pmd; + pmde =3D pmdp_get(pvmw->pmd); if (!pmd_present(pmde)) { softleaf_t entry; =20 @@ -317,7 +317,7 @@ bool page_vma_mapped_walk(struct page_vma_mapped_walk= *pvmw) goto restart; } pvmw->pte++; - } while (pte_none(ptep_get(pvmw->pte))); + } while (pte_none(ptep_get_lockless(pvmw->pte))); =20 if (!pvmw->ptl) { spin_lock(ptl); --=20 2.51.0