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Mon, 20 Jul 2026 14:47:34 +0000 (GMT) Received: from tuxmaker.boeblingen.de.ibm.com (unknown [9.87.85.9]) by smtpav04.fra02v.mail.ibm.com (Postfix) with SMTP; Mon, 20 Jul 2026 14:47:34 +0000 (GMT) Received: by tuxmaker.boeblingen.de.ibm.com (Postfix, from userid 55669) id 132C5162734; Mon, 20 Jul 2026 16:47:34 +0200 (CEST) From: Alexander Gordeev To: Vasily Gorbik , Gerald Schaefer , Heiko Carstens Cc: linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] s390/maccess: use proper PTE accessors for copying old memory Date: Mon, 20 Jul 2026 16:47:34 +0200 Message-ID: <20260720144734.1003497-1-agordeev@linux.ibm.com> X-Mailer: git-send-email 2.53.0 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-ORIG-GUID: xLkk_rB6UYMFLFHL-PBc6JekVQ4gSehT X-Proofpoint-Spam-Info: AW1haW4tMjYwNzIwMDE2MyBTYWx0ZWRfX+h96QXLDFNq/ ZPwBUEk/NZ14JI4B3AUR0wcayat7KMl5MRRynTJnZxiZM1l2V7HAOXllAH8rXgxeSQs5OCOOYgh DOEYlZU+M4MOe8ERswgngHo8XAQ9mxE= X-Proofpoint-GUID: xLkk_rB6UYMFLFHL-PBc6JekVQ4gSehT X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNzIwMDE2MyBTYWx0ZWRfX+jKyVYOY6xO9 YX3WlcAcZ21mjP1VMNsNvHXD4aZAI9nXlWgL2HfDyGaq5P5vOA0dIAn6K3zpW7BPR9JYaAGX/LI tOP3vwuQXPfJg2A2UYmkB0gcUXDfzCCK7RUFX/gzmzf2ArdUooIUE9UfkuY0O5ORFbom8EukPR8 EVhQo8vuaoTe6glS8SeRePGnTggI57DHIi+IwyJ5zFNz4c6Wm7ZbZ7jldGy+tNQ2+fExic441Yf 5oBp07ZAZsHj7bsqYlh1q24zk/hCmC/HtZCuy1cyZsHOMVooETU/Cb6nPwHxuJlaKFDUP6Yof4O N0z7FEw+4CVcUOCatJm8I7zlS0cWXcxrYmwk++2q5OqLgdsePtIfoXQ7vmuD9SICCBn0ik3Oa6i xsbkivm6PfZ/Lnts9mKsSgNVcMipkKVy6iNfTtFPxZsWR1yR/RMMaQA0AweGrQowQUgxRjUq0bq Gi6SQ+tFVIt4OzwxgVQ== X-Authority-Analysis: v=2.4 cv=K7AS2SWI c=1 sm=1 tr=0 ts=6a5e350b 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=6hP3MQ6zKI-DUMVT6IoA:9 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=2026-07-20_03,2026-07-20_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 suspectscore=0 bulkscore=0 clxscore=1015 priorityscore=1501 spamscore=0 phishscore=0 malwarescore=0 adultscore=0 impostorscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2607200163 Follow the pattern established by commit c33c794828f2 ("mm: ptep_get() conversion") and use proper PTE accessors instead of a direct pointer dereference in memcpy_real_iter(). Signed-off-by: Alexander Gordeev --- arch/s390/mm/maccess.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/s390/mm/maccess.c b/arch/s390/mm/maccess.c index cfd219fe495c..f39968dd8063 100644 --- a/arch/s390/mm/maccess.c +++ b/arch/s390/mm/maccess.c @@ -96,7 +96,7 @@ size_t memcpy_real_iter(struct iov_iter *iter, unsigned= long src, size_t count) pte =3D mk_pte_phys(phys, PAGE_KERNEL_RO); =20 mutex_lock(&memcpy_real_mutex); - if (pte_val(pte) !=3D pte_val(*memcpy_real_ptep)) { + if (pte_val(pte) !=3D pte_val(ptep_get(memcpy_real_ptep))) { __ptep_ipte(__memcpy_real_area, memcpy_real_ptep, 0, 0, IPTE_GLOBAL); set_pte(memcpy_real_ptep, pte); } --=20 2.53.0