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GET /api/patches/2202525/?format=api
{ "id": 2202525, "url": "http://patchwork.ozlabs.org/api/patches/2202525/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20260227200848.114019-5-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": "<20260227200848.114019-5-david@kernel.org>", "list_archive_url": "https://lore.kernel.org/linuxppc-dev/20260227200848.114019-5-david@kernel.org/", "date": "2026-02-27T20:08:35", "name": "[v1,04/16] mm/memory: simplify calculation in unmap_mapping_range_tree()", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "cd57c4e198169b56286c72f8b1943455ee891413", "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/20260227200848.114019-5-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/2202525/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2202525/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <linuxppc-dev+bounces-17412-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=VgnVpkaH;\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=1772223018; c=relaxed/relaxed;\n\tbh=PNXJ3lchDes2Cf/t7ldca5KjaC3s+A85b9AScdfhZoQ=;\n\th=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References:\n\t MIME-Version;\n b=WlMR7FUtHy7bFnW7saTvNeP1dkNJ6ZQ5f6/kvc4ijjN6keQfPpQJuOalXfC9SI2YRDjg9OYWgycrpzB8dIy/XP8AaOpyjmkkUCSdMrrHPskjz1wrGOFQQEteHx3fnrSIiLWRf7OUBiLbUtf2bP7e0npULLPDnsNCR1RFFvbp9DFl8XdbNJWKfbQKeRgSXfGO+MCud65r/CoaMtI2U6dQ3CXYY73L0raNkpHle7PuQ4S9/DNMXOJoprOxL5kIrrenqU85CdR6ympwiLQSVJ9OT2vORkVhnJZ9cibhDkBQeh6yUr1/zjqPaEARdMA7VlGKNrvNKLegsmDjeG0/kkMzbA==", "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=VgnVpkaH; dkim-atps=neutral;\n spf=pass (client-ip=172.105.4.254; helo=tor.source.kernel.org;\n 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=1772223014;\n\tbh=hLgJdGT31V5wnxVFe1vHLMNm/KVuWNy5vLAGWsJg21c=;\n\th=From:To:Cc:Subject:Date:In-Reply-To:References:From;\n\tb=VgnVpkaHaAkciLTAeL0+EHoy6ULSwuu9fj3VyFkgJooaJcw9CuTij8hQME2UbVNWD\n\t Yvc/lVRhwFa8DPT/JmgPCmNWacY7labSQ2afT1BQfoxShbwEJk2Jn8z7NxsGfCsqtz\n\t PFpbCDhsNtcpqdguKU2gvD4AUwof1y66dauCjiXbAiMN6CyWf4CltYotNxCjssrHCp\n\t /q9YFMkt4jNd7FScndseUUa/D3NnepYZOmjVGGfCd+L3Hgug9STuzNp9OaPEgAhBvJ\n\t WiDRQIsjsWJIIKTyzXG8Pn+MIUoCY9cTsDjzXp52+rtBZSOfNAH+NerJi1RRj2Hxlh\n\t G0ODowk2+zwXQ==", "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 04/16] mm/memory: simplify calculation in\n unmap_mapping_range_tree()", "Date": "Fri, 27 Feb 2026 21:08:35 +0100", "Message-ID": "<20260227200848.114019-5-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": "Let's simplify the calculation a bit further to make it easier to get,\nreusing vma_last_pgoff() which we move from interval_tree.c to mm.h.\n\nSigned-off-by: David Hildenbrand (Arm) <david@kernel.org>\n---\n include/linux/mm.h | 5 +++++\n mm/interval_tree.c | 5 -----\n mm/memory.c | 12 +++++-------\n 3 files changed, 10 insertions(+), 12 deletions(-)", "diff": "diff --git a/include/linux/mm.h b/include/linux/mm.h\nindex a8138ff7d1fa..d3ef586ee1c0 100644\n--- a/include/linux/mm.h\n+++ b/include/linux/mm.h\n@@ -4000,6 +4000,11 @@ static inline unsigned long vma_pages(const struct vm_area_struct *vma)\n \treturn (vma->vm_end - vma->vm_start) >> PAGE_SHIFT;\n }\n \n+static inline unsigned long vma_last_pgoff(struct vm_area_struct *vma)\n+{\n+\treturn vma->vm_pgoff + vma_pages(vma) - 1;\n+}\n+\n static inline unsigned long vma_desc_size(const struct vm_area_desc *desc)\n {\n \treturn desc->end - desc->start;\ndiff --git a/mm/interval_tree.c b/mm/interval_tree.c\nindex 32e390c42c53..32bcfbfcf15f 100644\n--- a/mm/interval_tree.c\n+++ b/mm/interval_tree.c\n@@ -15,11 +15,6 @@ static inline unsigned long vma_start_pgoff(struct vm_area_struct *v)\n \treturn v->vm_pgoff;\n }\n \n-static inline unsigned long vma_last_pgoff(struct vm_area_struct *v)\n-{\n-\treturn v->vm_pgoff + vma_pages(v) - 1;\n-}\n-\n INTERVAL_TREE_DEFINE(struct vm_area_struct, shared.rb,\n \t\t unsigned long, shared.rb_subtree_last,\n \t\t vma_start_pgoff, vma_last_pgoff, /* empty */, vma_interval_tree)\ndiff --git a/mm/memory.c b/mm/memory.c\nindex 5c47309331f5..e4154f03feac 100644\n--- a/mm/memory.c\n+++ b/mm/memory.c\n@@ -4227,17 +4227,15 @@ static inline void unmap_mapping_range_tree(struct rb_root_cached *root,\n \t\t\t\t\t struct zap_details *details)\n {\n \tstruct vm_area_struct *vma;\n-\tpgoff_t vba, vea, zba, zea;\n \tunsigned long start, size;\n \tstruct mmu_gather tlb;\n \n \tvma_interval_tree_foreach(vma, root, first_index, last_index) {\n-\t\tvba = vma->vm_pgoff;\n-\t\tvea = vba + vma_pages(vma) - 1;\n-\t\tzba = max(first_index, vba);\n-\t\tzea = min(last_index, vea);\n-\t\tstart = ((zba - vba) << PAGE_SHIFT) + vma->vm_start;\n-\t\tsize = (zea - zba + 1) << PAGE_SHIFT;\n+\t\tconst pgoff_t start_idx = max(first_index, vma->vm_pgoff);\n+\t\tconst pgoff_t end_idx = min(last_index, vma_last_pgoff(vma)) + 1;\n+\n+\t\tstart = vma->vm_start + ((start_idx - vma->vm_pgoff) << PAGE_SHIFT);\n+\t\tsize = (end_idx - start_idx) << PAGE_SHIFT;\n \n \t\ttlb_gather_mmu(&tlb, vma->vm_mm);\n \t\tzap_page_range_single_batched(&tlb, vma, start, size, details);\n", "prefixes": [ "v1", "04/16" ] }