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GET /api/patches/2216649/?format=api
{ "id": 2216649, "url": "http://patchwork.ozlabs.org/api/patches/2216649/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20260327021403.214713-17-usama.arif@linux.dev/", "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": "<20260327021403.214713-17-usama.arif@linux.dev>", "list_archive_url": "https://lore.kernel.org/linuxppc-dev/20260327021403.214713-17-usama.arif@linux.dev/", "date": "2026-03-27T02:08:58", "name": "[v3,16/24] mm: huge_mm: Make sure all split_huge_pmd calls are checked", "commit_ref": null, "pull_url": null, "state": "handled-elsewhere", "archived": false, "hash": "1056aa3cf1b079963f4aa0ae4949dd07698c0f0f", "submitter": { "id": 92719, "url": "http://patchwork.ozlabs.org/api/people/92719/?format=api", "name": "Usama Arif", "email": "usama.arif@linux.dev" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20260327021403.214713-17-usama.arif@linux.dev/mbox/", "series": [ { "id": 497678, "url": "http://patchwork.ozlabs.org/api/series/497678/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=497678", "date": "2026-03-27T02:08:43", "name": "[v3,01/24] mm: thp: make split_huge_pmd functions return int for error propagation", "version": 3, "mbox": "http://patchwork.ozlabs.org/series/497678/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2216649/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2216649/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <linuxppc-dev+bounces-18859-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 (1024-bit key;\n unprotected) header.d=linux.dev header.i=@linux.dev header.a=rsa-sha256\n header.s=key1 header.b=PBqsuNks;\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; c=relaxed/relaxed; d=linux.dev; s=key1;\n\tt=1774577748;\n\th=from:from:reply-to:subject:subject:date:date:message-id:message-id:\n\t to:to:cc:cc:mime-version:mime-version:\n\t content-transfer-encoding:content-transfer-encoding:\n\t in-reply-to:in-reply-to:references:references;\n\tbh=Y5PgiQrcwbn9XAgL4cRYPHYRVIr8zaspEnc9S8fZNtw=;\n\tb=PBqsuNksqiYxLcyifzHiiquL6Zzzi+Q6QhZKvMqsl6Ywk8e+CwDNj9TY+ZBrYzU5TX4YZX\n\ttN7zZsn84kggt2lWPGZqKW8iUu8t1aNBnigvnGagmSkB+xzT/lcMTAqVdArQiFTX42gjln\n\tp/GMbq4RVKzlqVsGNHcXNmutrl2WTFQ=", "From": "Usama Arif <usama.arif@linux.dev>", "To": "Andrew Morton <akpm@linux-foundation.org>,\n\tdavid@kernel.org,\n\tLorenzo Stoakes <ljs@kernel.org>,\n\twilly@infradead.org,\n\tlinux-mm@kvack.org", "Cc": "fvdl@google.com,\n\thannes@cmpxchg.org,\n\triel@surriel.com,\n\tshakeel.butt@linux.dev,\n\tkas@kernel.org,\n\tbaohua@kernel.org,\n\tdev.jain@arm.com,\n\tbaolin.wang@linux.alibaba.com,\n\tnpache@redhat.com,\n\tLiam.Howlett@oracle.com,\n\tryan.roberts@arm.com,\n\tVlastimil Babka <vbabka@kernel.org>,\n\tlance.yang@linux.dev,\n\tlinux-kernel@vger.kernel.org,\n\tkernel-team@meta.com,\n\tmaddy@linux.ibm.com,\n\tmpe@ellerman.id.au,\n\tlinuxppc-dev@lists.ozlabs.org,\n\thca@linux.ibm.com,\n\tgor@linux.ibm.com,\n\tagordeev@linux.ibm.com,\n\tborntraeger@linux.ibm.com,\n\tsvens@linux.ibm.com,\n\tlinux-s390@vger.kernel.org,\n\tUsama Arif <usama.arif@linux.dev>", "Subject": "[v3 16/24] mm: huge_mm: Make sure all split_huge_pmd calls are\n checked", "Date": "Thu, 26 Mar 2026 19:08:58 -0700", "Message-ID": "<20260327021403.214713-17-usama.arif@linux.dev>", "In-Reply-To": "<20260327021403.214713-1-usama.arif@linux.dev>", "References": "<20260327021403.214713-1-usama.arif@linux.dev>", "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-Migadu-Flow": "FLOW_OUT", "X-Spam-Status": "No, score=-0.2 required=3.0 tests=DKIM_SIGNED,DKIM_VALID,\n\tDKIM_VALID_AU,DKIM_VALID_EF,SPF_HELO_PASS,SPF_PASS autolearn=disabled\n\tversion=4.0.1 OzLabs 8", "X-Spam-Checker-Version": "SpamAssassin 4.0.1 (2024-03-25) on lists.ozlabs.org" }, "content": "Mark __split_huge_pmd(), split_huge_pmd() and split_huge_pmd_address()\nwith __must_check so the compiler warns if any caller ignores the return\nvalue. Not checking return value and operating on the basis that the pmd\nis split could result in a kernel bug. The possibility of an order-0\nallocation failing for page table allocation is very low, but it should\nbe handled correctly.\n\nSigned-off-by: Usama Arif <usama.arif@linux.dev>\n---\n include/linux/huge_mm.h | 6 +++---\n 1 file changed, 3 insertions(+), 3 deletions(-)", "diff": "diff --git a/include/linux/huge_mm.h b/include/linux/huge_mm.h\nindex 224965fce4e66..c4d0badc4ce27 100644\n--- a/include/linux/huge_mm.h\n+++ b/include/linux/huge_mm.h\n@@ -418,7 +418,7 @@ static inline int split_huge_page(struct page *page)\n extern struct list_lru deferred_split_lru;\n void deferred_split_folio(struct folio *folio, bool partially_mapped);\n \n-int __split_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd,\n+int __must_check __split_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd,\n \t\tunsigned long address, bool freeze);\n \n /**\n@@ -447,7 +447,7 @@ static inline bool pmd_is_huge(pmd_t pmd)\n \treturn false;\n }\n \n-static inline int split_huge_pmd(struct vm_area_struct *vma,\n+static inline int __must_check split_huge_pmd(struct vm_area_struct *vma,\n \t\t\t\t\t pmd_t *pmd, unsigned long address)\n {\n \tif (pmd_is_huge(*pmd))\n@@ -455,7 +455,7 @@ static inline int split_huge_pmd(struct vm_area_struct *vma,\n \treturn 0;\n }\n \n-int split_huge_pmd_address(struct vm_area_struct *vma, unsigned long address,\n+int __must_check split_huge_pmd_address(struct vm_area_struct *vma, unsigned long address,\n \t\tbool freeze);\n \n void __split_huge_pud(struct vm_area_struct *vma, pud_t *pud,\n", "prefixes": [ "v3", "16/24" ] }