{"id":2175645,"url":"http://patchwork.ozlabs.org/api/1.0/patches/2175645/?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-v18-8-755bc151a50b@linux.ibm.com>","date":"2025-12-18T17:09:40","name":"[v18,08/12] mm/page_table_check: Reinstate address parameter in [__]page_table_check_pte_clear()","commit_ref":null,"pull_url":null,"state":"handled-elsewhere","archived":false,"hash":"d73d86be3d36111f8798556523e2d90d9201d5a5","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-v18-8-755bc151a50b@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/2175645/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=gkHape/f;\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-v18-8-755bc151a50b@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":"AW1haW4tMjUxMjEzMDAwMSBTYWx0ZWRfXyW/AHu/sJjPm\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 aa232204c468 (\"mm/page_table_check: remove unused\nparameter in [__]page_table_check_pte_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, fix additional occurrence and loop handling]\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---\nv13: fix an additional occurrence\nv15: rebase, fix loop handling\n---\n arch/arm64/include/asm/pgtable.h | 2 +-\n arch/riscv/include/asm/pgtable.h | 2 +-\n arch/x86/include/asm/pgtable.h | 4 ++--\n include/linux/page_table_check.h | 11 +++++++----\n include/linux/pgtable.h | 4 ++--\n mm/page_table_check.c | 7 ++++---\n 6 files changed, 17 insertions(+), 13 deletions(-)","diff":"diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h\nindex 5abad90913eb8b0a3aa867cd5a66107bbf96e177..ce64c560e284e1c2ff9d698cf868070ed58ba045 100644\n--- a/arch/arm64/include/asm/pgtable.h\n+++ b/arch/arm64/include/asm/pgtable.h\n@@ -1342,7 +1342,7 @@ static inline pte_t __ptep_get_and_clear_anysz(struct mm_struct *mm,\n \n \tswitch (pgsize) {\n \tcase PAGE_SIZE:\n-\t\tpage_table_check_pte_clear(mm, pte);\n+\t\tpage_table_check_pte_clear(mm, address, pte);\n \t\tbreak;\n \tcase PMD_SIZE:\n \t\tpage_table_check_pmd_clear(mm, address, pte_pmd(pte));\ndiff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h\nindex f179970fe47d333565a9199e0991e806aed44346..9af5bfc780800fe2f974daa5329277c46877f848 100644\n--- a/arch/riscv/include/asm/pgtable.h\n+++ b/arch/riscv/include/asm/pgtable.h\n@@ -662,7 +662,7 @@ static inline pte_t ptep_get_and_clear(struct mm_struct *mm,\n {\n \tpte_t pte = __pte(atomic_long_xchg((atomic_long_t *)ptep, 0));\n \n-\tpage_table_check_pte_clear(mm, pte);\n+\tpage_table_check_pte_clear(mm, address, pte);\n \n \treturn pte;\n }\ndiff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h\nindex 5a2b2d3a80d83d8eff2c1a6f69df3e80590c684a..6ec6cf7ad2d4d92da7d3396bc96a5b5902e81576 100644\n--- a/arch/x86/include/asm/pgtable.h\n+++ b/arch/x86/include/asm/pgtable.h\n@@ -1252,7 +1252,7 @@ static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr,\n \t\t\t\t pte_t *ptep)\n {\n \tpte_t pte = native_ptep_get_and_clear(ptep);\n-\tpage_table_check_pte_clear(mm, pte);\n+\tpage_table_check_pte_clear(mm, addr, pte);\n \treturn pte;\n }\n \n@@ -1268,7 +1268,7 @@ static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm,\n \t\t * care about updates and native needs no locking\n \t\t */\n \t\tpte = native_local_ptep_get_and_clear(ptep);\n-\t\tpage_table_check_pte_clear(mm, pte);\n+\t\tpage_table_check_pte_clear(mm, addr, pte);\n \t} else {\n \t\tpte = ptep_get_and_clear(mm, addr, ptep);\n \t}\ndiff --git a/include/linux/page_table_check.h b/include/linux/page_table_check.h\nindex 3973b69ae294e501a9c6c3140bc462d6d9b7d203..12268a32e8be151f66f2787ce87096f10d4fa744 100644\n--- a/include/linux/page_table_check.h\n+++ b/include/linux/page_table_check.h\n@@ -14,7 +14,8 @@ extern struct static_key_true page_table_check_disabled;\n 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_pte_clear(struct mm_struct *mm, unsigned long addr,\n+\t\t\t\t pte_t pte);\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@@ -45,12 +46,13 @@ static inline void page_table_check_free(struct page *page, unsigned int order)\n \t__page_table_check_zero(page, order);\n }\n \n-static inline void page_table_check_pte_clear(struct mm_struct *mm, pte_t pte)\n+static inline void page_table_check_pte_clear(struct mm_struct *mm,\n+\t\t\t\t\t unsigned long addr, pte_t pte)\n {\n \tif (static_branch_likely(&page_table_check_disabled))\n \t\treturn;\n \n-\t__page_table_check_pte_clear(mm, pte);\n+\t__page_table_check_pte_clear(mm, addr, pte);\n }\n \n static inline void page_table_check_pmd_clear(struct mm_struct *mm,\n@@ -119,7 +121,8 @@ static inline void page_table_check_free(struct page *page, unsigned int order)\n {\n }\n \n-static inline void page_table_check_pte_clear(struct mm_struct *mm, pte_t pte)\n+static inline void page_table_check_pte_clear(struct mm_struct *mm,\n+\t\t\t\t\t unsigned long addr, pte_t pte)\n {\n }\n \ndiff --git a/include/linux/pgtable.h b/include/linux/pgtable.h\nindex 2d1f7369624c504b531beb8965e7352770a5f4bc..827dca25c0bc77025653f31075ed6913355bda08 100644\n--- a/include/linux/pgtable.h\n+++ b/include/linux/pgtable.h\n@@ -634,7 +634,7 @@ static inline pte_t ptep_get_and_clear(struct mm_struct *mm,\n {\n \tpte_t pte = ptep_get(ptep);\n \tpte_clear(mm, address, ptep);\n-\tpage_table_check_pte_clear(mm, pte);\n+\tpage_table_check_pte_clear(mm, address, pte);\n \treturn pte;\n }\n #endif\n@@ -693,7 +693,7 @@ static inline void ptep_clear(struct mm_struct *mm, unsigned long addr,\n \t * No need for ptep_get_and_clear(): page table check doesn't care about\n \t * any bits that could have been set by HW concurrently.\n \t */\n-\tpage_table_check_pte_clear(mm, pte);\n+\tpage_table_check_pte_clear(mm, addr, pte);\n }\n \n #ifdef CONFIG_GUP_GET_PXX_LOW_HIGH\ndiff --git a/mm/page_table_check.c b/mm/page_table_check.c\nindex e8280b0b6dda97ee68bb52593df454665bac9acf..de9e54bd27e6f2bce68304a0b3e99b139f33c313 100644\n--- a/mm/page_table_check.c\n+++ b/mm/page_table_check.c\n@@ -145,7 +145,8 @@ void __page_table_check_zero(struct page *page, unsigned int order)\n \trcu_read_unlock();\n }\n \n-void __page_table_check_pte_clear(struct mm_struct *mm, pte_t pte)\n+void __page_table_check_pte_clear(struct mm_struct *mm, unsigned long addr,\n+\t\t\t\t pte_t pte)\n {\n \tif (&init_mm == mm)\n \t\treturn;\n@@ -209,7 +210,7 @@ void __page_table_check_ptes_set(struct mm_struct *mm, unsigned long addr,\n \tpage_table_check_pte_flags(pte);\n \n \tfor (i = 0; i < nr; i++)\n-\t\t__page_table_check_pte_clear(mm, ptep_get(ptep + i));\n+\t\t__page_table_check_pte_clear(mm, addr + PAGE_SIZE * i, ptep_get(ptep + i));\n \tif (pte_user_accessible_page(pte))\n \t\tpage_table_check_set(pte_pfn(pte), nr, pte_write(pte));\n }\n@@ -275,7 +276,7 @@ void __page_table_check_pte_clear_range(struct mm_struct *mm,\n \t\tif (WARN_ON(!ptep))\n \t\t\treturn;\n \t\tfor (i = 0; i < PTRS_PER_PTE; i++) {\n-\t\t\t__page_table_check_pte_clear(mm, ptep_get(ptep));\n+\t\t\t__page_table_check_pte_clear(mm, addr, ptep_get(ptep));\n \t\t\taddr += PAGE_SIZE;\n \t\t\tptep++;\n \t\t}\n","prefixes":["v18","08/12"]}