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GET /api/patches/2202536/?format=api
{ "id": 2202536, "url": "http://patchwork.ozlabs.org/api/patches/2202536/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20260227200848.114019-16-david@kernel.org/", "project": { "id": 2, "url": "http://patchwork.ozlabs.org/api/projects/2/?format=api", "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/", "list_archive_url": "https://lore.kernel.org/linuxppc-dev/", "list_archive_url_format": "https://lore.kernel.org/linuxppc-dev/{}/", "commit_url_format": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?id={}" }, "msgid": "<20260227200848.114019-16-david@kernel.org>", "list_archive_url": "https://lore.kernel.org/linuxppc-dev/20260227200848.114019-16-david@kernel.org/", "date": "2026-02-27T20:08:46", "name": "[v1,15/16] mm: rename zap_vma_ptes() to zap_special_vma_range()", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "91bf15a574ff8342fef30790734b1774258aa4d1", "submitter": { "id": 92023, "url": "http://patchwork.ozlabs.org/api/people/92023/?format=api", "name": "David Hildenbrand (Arm)", "email": "david@kernel.org" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20260227200848.114019-16-david@kernel.org/mbox/", "series": [ { "id": 493807, "url": "http://patchwork.ozlabs.org/api/series/493807/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=493807", "date": "2026-02-27T20:08:31", "name": "mm: cleanups around unmapping / zapping", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/493807/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2202536/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2202536/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <linuxppc-dev+bounces-17423-incoming=patchwork.ozlabs.org@lists.ozlabs.org>", "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=kernel.org header.i=@kernel.org header.a=rsa-sha256\n header.s=k20201202 header.b=BoKOHAuN;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org\n (client-ip=2404:9400:21b9:f100::1; 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a=rsa-sha256; d=lists.ozlabs.org; s=201707;\n\tt=1772223198; c=relaxed/relaxed;\n\tbh=tGcj024N/3/Sdl4LkKivnSwcbObEcpHcloksqRsVDAE=;\n\th=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References:\n\t MIME-Version;\n b=bQVJuqpQFc9arW8jI+gRCOSgAW5xZT4JyK7iASQURkTI7zu1cEMGlu1WHLmOK/h/ZFnOduKVYGuL2KRSDvNaLwLzey/vGdTO5JYmnhKPFC3pZNkdAN3GeBiI13U5335f7LGWybf+XhBQjt4loGMjxy5YHFbO8obEn7FEECHEjp/F7dkiiCIVWBU0YaQIS5lfcd4oqkK92v5FI+DWtROLIocfRs6+aRj9b0U7cbsZ21LrQvwSOU16+URjrfTkRuIZGLSOKbQBUgPMcPro5KE6svQ66Q88X8gPMuo6MNo+jXP/reJaY+INTU6EQAGCGL0YcnSAzCXBBtyEV02PPGrzwg==", "ARC-Authentication-Results": "i=1; lists.ozlabs.org;\n dmarc=pass (p=quarantine dis=none) header.from=kernel.org;\n dkim=pass (2048-bit key;\n unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256\n header.s=k20201202 header.b=BoKOHAuN; dkim-atps=neutral;\n spf=pass (client-ip=2600:3c0a:e001:78e:0:1991:8:25;\n helo=sea.source.kernel.org; envelope-from=david@kernel.org;\n receiver=lists.ozlabs.org) smtp.mailfrom=kernel.org", "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org;\n\ts=k20201202; t=1772223195;\n\tbh=DPPIBtN2jxViPTx92f0FRSM/ZG0jW4iTVJwPfrqzIh8=;\n\th=From:To:Cc:Subject:Date:In-Reply-To:References:From;\n\tb=BoKOHAuNZ9Lyo7Qtb0Xof+aunTUAVWSO8ZoPbTGOPgLQXtV0Yd5aS+UZIgyjqPWyG\n\t vZmzq/IjgABznEGt/QBHMye+nvxDauSyr1ob8vYx++A8qeditQSZhx0juhW4Ku3jLI\n\t EtPn/NcjeZf5E8HIOEKZaesHsYySld9X2Gq2lh2UwrWDeRAQwg7S8EQwWCpzWOPF3h\n\t 02mpsuNIVLh3B+yx1arHr+zdp9OkH7YJ2G8iXKu8/U/Is9ylU8rZYRnHH3VXp0Rngh\n\t IFj2yD+bA6f/hZFicveu86BbVaR/MWonPQjll+u10qmI3mZsQJPdrOpCxQ5+dIctJ1\n\t g6P8BOcpXbHBw==", "From": "\"David Hildenbrand (Arm)\" <david@kernel.org>", "To": "linux-kernel@vger.kernel.org", "Cc": "\"linux-mm @ kvack . org\" <linux-mm@kvack.org>,\n \"David Hildenbrand (Arm)\" <david@kernel.org>,\n Andrew Morton <akpm@linux-foundation.org>,\n Lorenzo Stoakes <lorenzo.stoakes@oracle.com>,\n \"Liam R. Howlett\" <Liam.Howlett@oracle.com>,\n Vlastimil Babka <vbabka@kernel.org>, Mike Rapoport <rppt@kernel.org>,\n Suren Baghdasaryan <surenb@google.com>, Michal Hocko <mhocko@suse.com>,\n Jann Horn <jannh@google.com>, Pedro Falcato <pfalcato@suse.de>,\n David Rientjes <rientjes@google.com>, Shakeel Butt <shakeel.butt@linux.dev>,\n \"Matthew Wilcox (Oracle)\" <willy@infradead.org>,\n Alice Ryhl <aliceryhl@google.com>, Madhavan Srinivasan <maddy@linux.ibm.com>,\n Michael Ellerman <mpe@ellerman.id.au>,\n Christian Borntraeger <borntraeger@linux.ibm.com>,\n Janosch Frank <frankja@linux.ibm.com>,\n Claudio Imbrenda <imbrenda@linux.ibm.com>,\n Alexander Gordeev <agordeev@linux.ibm.com>,\n Gerald Schaefer <gerald.schaefer@linux.ibm.com>,\n Heiko Carstens <hca@linux.ibm.com>, Vasily Gorbik <gor@linux.ibm.com>,\n Jarkko Sakkinen <jarkko@kernel.org>, Thomas Gleixner <tglx@kernel.org>,\n Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,\n Greg Kroah-Hartman <gregkh@linuxfoundation.org>, =?utf-8?q?Arve_Hj=C3=B8nne?=\n\t=?utf-8?q?v=C3=A5g?= <arve@android.com>, Todd Kjos <tkjos@android.com>,\n Christian Brauner <brauner@kernel.org>, Carlos Llamas <cmllamas@google.com>,\n Ian Abbott <abbotti@mev.co.uk>,\n H Hartley Sweeten <hsweeten@visionengravers.com>,\n Jani Nikula <jani.nikula@linux.intel.com>,\n Joonas Lahtinen <joonas.lahtinen@linux.intel.com>,\n Rodrigo Vivi <rodrigo.vivi@intel.com>, Tvrtko Ursulin <tursulin@ursulin.net>,\n David Airlie <airlied@gmail.com>, Simona Vetter <simona@ffwll.ch>,\n Jason Gunthorpe <jgg@ziepe.ca>, Leon Romanovsky <leon@kernel.org>,\n Dimitri Sivanich <dimitri.sivanich@hpe.com>, Arnd Bergmann <arnd@arndb.de>,\n Alexei Starovoitov <ast@kernel.org>, Daniel Borkmann <daniel@iogearbox.net>,\n Andrii Nakryiko <andrii@kernel.org>, Peter Zijlstra <peterz@infradead.org>,\n Arnaldo Carvalho de Melo <acme@kernel.org>,\n Namhyung Kim <namhyung@kernel.org>, Andy Lutomirski <luto@kernel.org>,\n Vincenzo Frascino <vincenzo.frascino@arm.com>,\n Eric Dumazet <edumazet@google.com>, Neal Cardwell <ncardwell@google.com>,\n \"David S. Miller\" <davem@davemloft.net>, David Ahern <dsahern@kernel.org>,\n Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,\n Miguel Ojeda <ojeda@kernel.org>, linuxppc-dev@lists.ozlabs.org,\n kvm@vger.kernel.org, linux-s390@vger.kernel.org, linux-sgx@vger.kernel.org,\n intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org,\n linux-rdma@vger.kernel.org, bpf@vger.kernel.org,\n linux-perf-users@vger.kernel.org, linux-fsdevel@vger.kernel.org,\n netdev@vger.kernel.org, rust-for-linux@vger.kernel.org, x86@kernel.org", "Subject": "[PATCH v1 15/16] mm: rename zap_vma_ptes() to zap_special_vma_range()", "Date": "Fri, 27 Feb 2026 21:08:46 +0100", "Message-ID": "<20260227200848.114019-16-david@kernel.org>", "X-Mailer": "git-send-email 2.43.0", "In-Reply-To": "<20260227200848.114019-1-david@kernel.org>", "References": "<20260227200848.114019-1-david@kernel.org>", "X-Mailing-List": "linuxppc-dev@lists.ozlabs.org", "List-Id": "<linuxppc-dev.lists.ozlabs.org>", "List-Help": "<mailto:linuxppc-dev+help@lists.ozlabs.org>", "List-Owner": "<mailto:linuxppc-dev+owner@lists.ozlabs.org>", "List-Post": "<mailto:linuxppc-dev@lists.ozlabs.org>", "List-Archive": "<https://lore.kernel.org/linuxppc-dev/>,\n <https://lists.ozlabs.org/pipermail/linuxppc-dev/>", "List-Subscribe": "<mailto:linuxppc-dev+subscribe@lists.ozlabs.org>,\n <mailto:linuxppc-dev+subscribe-digest@lists.ozlabs.org>,\n <mailto:linuxppc-dev+subscribe-nomail@lists.ozlabs.org>", "List-Unsubscribe": "<mailto:linuxppc-dev+unsubscribe@lists.ozlabs.org>", "Precedence": "list", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "X-Spam-Status": "No, score=-0.2 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED,\n\tDKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,SPF_HELO_NONE,SPF_PASS\n\tautolearn=disabled version=4.0.1 OzLabs 8", "X-Spam-Checker-Version": "SpamAssassin 4.0.1 (2024-03-25) on lists.ozlabs.org" }, "content": "zap_vma_ptes() is the only zapping function we export to modules.\n\nIt's essentially a wrapper around zap_vma_range(), however, with some\nsafety checks:\n* That the passed range fits fully into the VMA\n* That it's only used for VM_PFNMAP\n\nWe might want to support VM_MIXEDMAP soon as well, so use the\nmore-generic term \"special vma\", although \"special\" is a bit overloaded.\nMaybe we'll later just support any VM_SPECIAL flag.\n\nWhile at it, improve the kerneldoc.\n\nSigned-off-by: David Hildenbrand (Arm) <david@kernel.org>\n---\n arch/x86/kernel/cpu/sgx/encl.c | 2 +-\n drivers/comedi/comedi_fops.c | 2 +-\n drivers/gpu/drm/i915/i915_mm.c | 4 ++--\n drivers/infiniband/core/uverbs_main.c | 6 +++---\n drivers/misc/sgi-gru/grumain.c | 2 +-\n include/linux/mm.h | 2 +-\n mm/memory.c | 16 +++++++---------\n 7 files changed, 16 insertions(+), 18 deletions(-)", "diff": "diff --git a/arch/x86/kernel/cpu/sgx/encl.c b/arch/x86/kernel/cpu/sgx/encl.c\nindex ac60ebde5d9b..3f0222d10f6e 100644\n--- a/arch/x86/kernel/cpu/sgx/encl.c\n+++ b/arch/x86/kernel/cpu/sgx/encl.c\n@@ -1220,7 +1220,7 @@ void sgx_zap_enclave_ptes(struct sgx_encl *encl, unsigned long addr)\n \n \t\t\tret = sgx_encl_find(encl_mm->mm, addr, &vma);\n \t\t\tif (!ret && encl == vma->vm_private_data)\n-\t\t\t\tzap_vma_ptes(vma, addr, PAGE_SIZE);\n+\t\t\t\tzap_special_vma_range(vma, addr, PAGE_SIZE);\n \n \t\t\tmmap_read_unlock(encl_mm->mm);\n \ndiff --git a/drivers/comedi/comedi_fops.c b/drivers/comedi/comedi_fops.c\nindex 48a8a607a84c..b91e0b5ac394 100644\n--- a/drivers/comedi/comedi_fops.c\n+++ b/drivers/comedi/comedi_fops.c\n@@ -2588,7 +2588,7 @@ static int comedi_mmap(struct file *file, struct vm_area_struct *vma)\n \t * remap_pfn_range() because we call remap_pfn_range() in a loop.\n \t */\n \tif (retval)\n-\t\tzap_vma_ptes(vma, vma->vm_start, size);\n+\t\tzap_special_vma_range(vma, vma->vm_start, size);\n #endif\n \n \tif (retval == 0) {\ndiff --git a/drivers/gpu/drm/i915/i915_mm.c b/drivers/gpu/drm/i915/i915_mm.c\nindex c33bd3d83069..fd89e7c7d8d6 100644\n--- a/drivers/gpu/drm/i915/i915_mm.c\n+++ b/drivers/gpu/drm/i915/i915_mm.c\n@@ -108,7 +108,7 @@ int remap_io_mapping(struct vm_area_struct *vma,\n \n \terr = apply_to_page_range(r.mm, addr, size, remap_pfn, &r);\n \tif (unlikely(err)) {\n-\t\tzap_vma_ptes(vma, addr, (r.pfn - pfn) << PAGE_SHIFT);\n+\t\tzap_special_vma_range(vma, addr, (r.pfn - pfn) << PAGE_SHIFT);\n \t\treturn err;\n \t}\n \n@@ -156,7 +156,7 @@ int remap_io_sg(struct vm_area_struct *vma,\n \n \terr = apply_to_page_range(r.mm, addr, size, remap_sg, &r);\n \tif (unlikely(err)) {\n-\t\tzap_vma_ptes(vma, addr, r.pfn << PAGE_SHIFT);\n+\t\tzap_special_vma_range(vma, addr, r.pfn << PAGE_SHIFT);\n \t\treturn err;\n \t}\n \ndiff --git a/drivers/infiniband/core/uverbs_main.c b/drivers/infiniband/core/uverbs_main.c\nindex 7b68967a6301..f5837da47299 100644\n--- a/drivers/infiniband/core/uverbs_main.c\n+++ b/drivers/infiniband/core/uverbs_main.c\n@@ -756,7 +756,7 @@ static void rdma_umap_open(struct vm_area_struct *vma)\n \t * point, so zap it.\n \t */\n \tvma->vm_private_data = NULL;\n-\tzap_vma_ptes(vma, vma->vm_start, vma->vm_end - vma->vm_start);\n+\tzap_special_vma_range(vma, vma->vm_start, vma->vm_end - vma->vm_start);\n }\n \n static void rdma_umap_close(struct vm_area_struct *vma)\n@@ -782,7 +782,7 @@ static void rdma_umap_close(struct vm_area_struct *vma)\n }\n \n /*\n- * Once the zap_vma_ptes has been called touches to the VMA will come here and\n+ * Once the zap_special_vma_range has been called touches to the VMA will come here and\n * we return a dummy writable zero page for all the pfns.\n */\n static vm_fault_t rdma_umap_fault(struct vm_fault *vmf)\n@@ -878,7 +878,7 @@ void uverbs_user_mmap_disassociate(struct ib_uverbs_file *ufile)\n \t\t\t\tcontinue;\n \t\t\tlist_del_init(&priv->list);\n \n-\t\t\tzap_vma_ptes(vma, vma->vm_start,\n+\t\t\tzap_special_vma_range(vma, vma->vm_start,\n \t\t\t\t vma->vm_end - vma->vm_start);\n \n \t\t\tif (priv->entry) {\ndiff --git a/drivers/misc/sgi-gru/grumain.c b/drivers/misc/sgi-gru/grumain.c\nindex 8d749f345246..278b76cbd281 100644\n--- a/drivers/misc/sgi-gru/grumain.c\n+++ b/drivers/misc/sgi-gru/grumain.c\n@@ -542,7 +542,7 @@ void gru_unload_context(struct gru_thread_state *gts, int savestate)\n \tint ctxnum = gts->ts_ctxnum;\n \n \tif (!is_kernel_context(gts))\n-\t\tzap_vma_ptes(gts->ts_vma, UGRUADDR(gts), GRU_GSEG_PAGESIZE);\n+\t\tzap_special_vma_range(gts->ts_vma, UGRUADDR(gts), GRU_GSEG_PAGESIZE);\n \tcch = get_cch(gru->gs_gru_base_vaddr, ctxnum);\n \n \tgru_dbg(grudev, \"gts %p, cbrmap 0x%lx, dsrmap 0x%lx\\n\",\ndiff --git a/include/linux/mm.h b/include/linux/mm.h\nindex 833bedd3f739..07f6819db02d 100644\n--- a/include/linux/mm.h\n+++ b/include/linux/mm.h\n@@ -2833,7 +2833,7 @@ struct page *vm_normal_page_pmd(struct vm_area_struct *vma, unsigned long addr,\n struct page *vm_normal_page_pud(struct vm_area_struct *vma, unsigned long addr,\n \t\tpud_t pud);\n \n-void zap_vma_ptes(struct vm_area_struct *vma, unsigned long address,\n+void zap_special_vma_range(struct vm_area_struct *vma, unsigned long address,\n \t\t unsigned long size);\n void zap_vma_range(struct vm_area_struct *vma, unsigned long address,\n \t\t\t unsigned long size);\ndiff --git a/mm/memory.c b/mm/memory.c\nindex dd737b6d28c0..f3b7b7e16138 100644\n--- a/mm/memory.c\n+++ b/mm/memory.c\n@@ -2233,17 +2233,15 @@ void zap_vma_range(struct vm_area_struct *vma, unsigned long address,\n }\n \n /**\n- * zap_vma_ptes - remove ptes mapping the vma\n- * @vma: vm_area_struct holding ptes to be zapped\n- * @address: starting address of pages to zap\n+ * zap_special_vma_range - zap all page table entries in a special vma range\n+ * @vma: the vma covering the range to zap\n+ * @address: starting address of the range to zap\n * @size: number of bytes to zap\n *\n- * This function only unmaps ptes assigned to VM_PFNMAP vmas.\n- *\n- * The entire address range must be fully contained within the vma.\n- *\n+ * This function does nothing when the provided address range is not fully\n+ * contained in @vma, or when the @vma is not VM_PFNMAP.\n */\n-void zap_vma_ptes(struct vm_area_struct *vma, unsigned long address,\n+void zap_special_vma_range(struct vm_area_struct *vma, unsigned long address,\n \t\tunsigned long size)\n {\n \tif (!range_in_vma(vma, address, address + size) ||\n@@ -2252,7 +2250,7 @@ void zap_vma_ptes(struct vm_area_struct *vma, unsigned long address,\n \n \tzap_vma_range(vma, address, size);\n }\n-EXPORT_SYMBOL_GPL(zap_vma_ptes);\n+EXPORT_SYMBOL_GPL(zap_special_vma_range);\n \n static pmd_t *walk_to_pmd(struct mm_struct *mm, unsigned long addr)\n {\n", "prefixes": [ "v1", "15/16" ] }