{"id":2175644,"url":"http://patchwork.ozlabs.org/api/1.0/patches/2175644/?format=json","project":{"id":2,"url":"http://patchwork.ozlabs.org/api/1.0/projects/2/?format=json","name":"Linux PPC development","link_name":"linuxppc-dev","list_id":"linuxppc-dev.lists.ozlabs.org","list_email":"linuxppc-dev@lists.ozlabs.org","web_url":"https://github.com/linuxppc/wiki/wiki","scm_url":"https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git","webscm_url":"https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/"},"msgid":"<20251219-pgtable_check_v18rebase-v18-7-755bc151a50b@linux.ibm.com>","date":"2025-12-18T17:09:39","name":"[v18,07/12] mm/page_table_check: Reinstate address parameter in [__]page_table_check_pmd_clear()","commit_ref":null,"pull_url":null,"state":"handled-elsewhere","archived":false,"hash":"a94243e0b0f8fa2ed9f21630b4aaca900056448d","submitter":{"id":76551,"url":"http://patchwork.ozlabs.org/api/1.0/people/76551/?format=json","name":"Andrew Donnellan","email":"ajd@linux.ibm.com"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20251219-pgtable_check_v18rebase-v18-7-755bc151a50b@linux.ibm.com/mbox/","series":[{"id":485885,"url":"http://patchwork.ozlabs.org/api/1.0/series/485885/?format=json","date":"2025-12-18T17:09:32","name":"Support page table check on PowerPC","version":18,"mbox":"http://patchwork.ozlabs.org/series/485885/mbox/"}],"check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2175644/checks/","tags":{},"headers":{"Return-Path":"\n ","X-Original-To":["incoming@patchwork.ozlabs.org","linuxppc-dev@lists.ozlabs.org"],"Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256\n header.s=pp1 header.b=i3MeOG1U;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org\n 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","List-Unsubscribe":"","Precedence":"list","MIME-Version":"1.0","Content-Type":"text/plain; charset=\"utf-8\"","Content-Transfer-Encoding":"7bit","Message-Id":"\n <20251219-pgtable_check_v18rebase-v18-7-755bc151a50b@linux.ibm.com>","References":"\n <20251219-pgtable_check_v18rebase-v18-0-755bc151a50b@linux.ibm.com>","In-Reply-To":"\n <20251219-pgtable_check_v18rebase-v18-0-755bc151a50b@linux.ibm.com>","To":"linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org,\n Pasha Tatashin ,\n Andrew Morton ,\n Madhavan Srinivasan ,\n Nicholas Piggin ,\n Rohan McLure ,\n Christophe Leroy ","Cc":"Alexandre Ghiti , x86@kernel.org,\n Nicholas Miehlbradt ,\n Sweet Tea Dorminy ,\n Andrew Donnellan ,\n Srish Srinivasan ,\n linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,\n linux-riscv@lists.infradead.org","X-Mailer":"b4 0.14.2","X-TM-AS-GCONF":"00","X-Proofpoint-Spam-Details-Enc":"AW1haW4tMjUxMjEzMDAwMSBTYWx0ZWRfX6nzb5F/ecAh3\n 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engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.9,FMLib:17.12.100.49\n definitions=2025-12-18_02,2025-12-17_02,2025-10-01_01","X-Proofpoint-Spam-Details":"rule=outbound_notspam policy=outbound score=0\n suspectscore=0 malwarescore=0 impostorscore=0 clxscore=1015 spamscore=0\n priorityscore=1501 lowpriorityscore=0 bulkscore=0 phishscore=0 adultscore=0\n classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0\n reason=mlx scancount=1 engine=8.19.0-2510240000 definitions=main-2512130001","X-Spam-Status":"No, score=-0.7 required=3.0 tests=DKIM_SIGNED,DKIM_VALID,\n\tRCVD_IN_DNSWL_LOW,RCVD_IN_MSPIKE_H4,RCVD_IN_MSPIKE_WL,SPF_HELO_NONE,\n\tSPF_PASS autolearn=disabled version=4.0.1 OzLabs 8","X-Spam-Checker-Version":"SpamAssassin 4.0.1 (2024-03-25) on lists.ozlabs.org"},"content":"From: Rohan McLure \n\nThis reverts commit 1831414cd729 (\"mm/page_table_check: remove unused\nparameter in [__]page_table_check_pmd_clear\").\n\nReinstate previously unused parameters for the purpose of supporting\npowerpc platforms, as many do not encode user/kernel ownership of the\npage in the pte, but instead in the address of the access.\n\n[ajd@linux.ibm.com: rebase on arm64 changes]\nSigned-off-by: Rohan McLure \nReviewed-by: Pasha Tatashin \nAcked-by: Ingo Molnar # x86\nAcked-by: Alexandre Ghiti # riscv\nSigned-off-by: Andrew Donnellan \n---\nv15: rebase\n---\n arch/arm64/include/asm/pgtable.h | 2 +-\n arch/riscv/include/asm/pgtable.h | 2 +-\n arch/x86/include/asm/pgtable.h | 2 +-\n include/linux/page_table_check.h | 11 +++++++----\n include/linux/pgtable.h | 2 +-\n mm/page_table_check.c | 5 +++--\n 6 files changed, 14 insertions(+), 10 deletions(-)","diff":"diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h\nindex 595405e6bfc736f2824a9c2e8784351f15ad0571..5abad90913eb8b0a3aa867cd5a66107bbf96e177 100644\n--- a/arch/arm64/include/asm/pgtable.h\n+++ b/arch/arm64/include/asm/pgtable.h\n@@ -1345,7 +1345,7 @@ static inline pte_t __ptep_get_and_clear_anysz(struct mm_struct *mm,\n \t\tpage_table_check_pte_clear(mm, pte);\n \t\tbreak;\n \tcase PMD_SIZE:\n-\t\tpage_table_check_pmd_clear(mm, pte_pmd(pte));\n+\t\tpage_table_check_pmd_clear(mm, address, pte_pmd(pte));\n \t\tbreak;\n #ifndef __PAGETABLE_PMD_FOLDED\n \tcase PUD_SIZE:\ndiff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h\nindex 841494ef46ee6ae1410f420dc7d0a99c4e1958cf..f179970fe47d333565a9199e0991e806aed44346 100644\n--- a/arch/riscv/include/asm/pgtable.h\n+++ b/arch/riscv/include/asm/pgtable.h\n@@ -999,7 +999,7 @@ static inline pmd_t pmdp_huge_get_and_clear(struct mm_struct *mm,\n {\n \tpmd_t pmd = __pmd(atomic_long_xchg((atomic_long_t *)pmdp, 0));\n \n-\tpage_table_check_pmd_clear(mm, pmd);\n+\tpage_table_check_pmd_clear(mm, address, pmd);\n \n \treturn pmd;\n }\ndiff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h\nindex 3eb36a36058face6aba92efe3eed7214752e751f..5a2b2d3a80d83d8eff2c1a6f69df3e80590c684a 100644\n--- a/arch/x86/include/asm/pgtable.h\n+++ b/arch/x86/include/asm/pgtable.h\n@@ -1319,7 +1319,7 @@ static inline pmd_t pmdp_huge_get_and_clear(struct mm_struct *mm, unsigned long\n {\n \tpmd_t pmd = native_pmdp_get_and_clear(pmdp);\n \n-\tpage_table_check_pmd_clear(mm, pmd);\n+\tpage_table_check_pmd_clear(mm, addr, pmd);\n \n \treturn pmd;\n }\ndiff --git a/include/linux/page_table_check.h b/include/linux/page_table_check.h\nindex 808cc3a48c28fcf988ba2c50031fa4f317496582..3973b69ae294e501a9c6c3140bc462d6d9b7d203 100644\n--- a/include/linux/page_table_check.h\n+++ b/include/linux/page_table_check.h\n@@ -15,7 +15,8 @@ extern struct page_ext_operations page_table_check_ops;\n \n void __page_table_check_zero(struct page *page, unsigned int order);\n void __page_table_check_pte_clear(struct mm_struct *mm, pte_t pte);\n-void __page_table_check_pmd_clear(struct mm_struct *mm, pmd_t pmd);\n+void __page_table_check_pmd_clear(struct mm_struct *mm, unsigned long addr,\n+\t\t\t\t pmd_t pmd);\n void __page_table_check_pud_clear(struct mm_struct *mm, unsigned long addr,\n \t\t\t\t pud_t pud);\n void __page_table_check_ptes_set(struct mm_struct *mm, unsigned long addr,\n@@ -52,12 +53,13 @@ static inline void page_table_check_pte_clear(struct mm_struct *mm, pte_t pte)\n \t__page_table_check_pte_clear(mm, pte);\n }\n \n-static inline void page_table_check_pmd_clear(struct mm_struct *mm, pmd_t pmd)\n+static inline void page_table_check_pmd_clear(struct mm_struct *mm,\n+\t\t\t\t\t unsigned long addr, pmd_t pmd)\n {\n \tif (static_branch_likely(&page_table_check_disabled))\n \t\treturn;\n \n-\t__page_table_check_pmd_clear(mm, pmd);\n+\t__page_table_check_pmd_clear(mm, addr, pmd);\n }\n \n static inline void page_table_check_pud_clear(struct mm_struct *mm,\n@@ -121,7 +123,8 @@ static inline void page_table_check_pte_clear(struct mm_struct *mm, pte_t pte)\n {\n }\n \n-static inline void page_table_check_pmd_clear(struct mm_struct *mm, pmd_t pmd)\n+static inline void page_table_check_pmd_clear(struct mm_struct *mm,\n+\t\t\t\t\t unsigned long addr, pmd_t pmd)\n {\n }\n \ndiff --git a/include/linux/pgtable.h b/include/linux/pgtable.h\nindex ed3c28ebeb35b766418abdefa5cc6604c0533479..2d1f7369624c504b531beb8965e7352770a5f4bc 100644\n--- a/include/linux/pgtable.h\n+++ b/include/linux/pgtable.h\n@@ -788,7 +788,7 @@ static inline pmd_t pmdp_huge_get_and_clear(struct mm_struct *mm,\n \tpmd_t pmd = *pmdp;\n \n \tpmd_clear(pmdp);\n-\tpage_table_check_pmd_clear(mm, pmd);\n+\tpage_table_check_pmd_clear(mm, address, pmd);\n \n \treturn pmd;\n }\ndiff --git a/mm/page_table_check.c b/mm/page_table_check.c\nindex 2295bc9368ab9cc827ee671ff9abf18a6b738172..e8280b0b6dda97ee68bb52593df454665bac9acf 100644\n--- a/mm/page_table_check.c\n+++ b/mm/page_table_check.c\n@@ -156,7 +156,8 @@ void __page_table_check_pte_clear(struct mm_struct *mm, pte_t pte)\n }\n EXPORT_SYMBOL(__page_table_check_pte_clear);\n \n-void __page_table_check_pmd_clear(struct mm_struct *mm, pmd_t pmd)\n+void __page_table_check_pmd_clear(struct mm_struct *mm, unsigned long addr,\n+\t\t\t\t pmd_t pmd)\n {\n \tif (&init_mm == mm)\n \t\treturn;\n@@ -238,7 +239,7 @@ void __page_table_check_pmds_set(struct mm_struct *mm, unsigned long addr,\n \tpage_table_check_pmd_flags(pmd);\n \n \tfor (i = 0; i < nr; i++)\n-\t\t__page_table_check_pmd_clear(mm, *(pmdp + i));\n+\t\t__page_table_check_pmd_clear(mm, addr + PMD_SIZE * i, *(pmdp + i));\n \tif (pmd_user_accessible_page(pmd))\n \t\tpage_table_check_set(pmd_pfn(pmd), stride * nr, pmd_write(pmd));\n }\n","prefixes":["v18","07/12"]}