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GET /api/1.1/patches/2229050/?format=api
{ "id": 2229050, "url": "http://patchwork.ozlabs.org/api/1.1/patches/2229050/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/0ee46bb228d97163fbdc14f2a7c52b93d8bc34ce.1777306795.git.chleroy@kernel.org/", "project": { "id": 2, "url": "http://patchwork.ozlabs.org/api/1.1/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/" }, "msgid": "<0ee46bb228d97163fbdc14f2a7c52b93d8bc34ce.1777306795.git.chleroy@kernel.org>", "date": "2026-04-27T17:13:48", "name": "[RFC,v1,7/9] x86: Add unsafe_copy_from_user()", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "c8386877599f25dd852e3a6093a029b948f11fda", "submitter": { "id": 92089, "url": "http://patchwork.ozlabs.org/api/1.1/people/92089/?format=api", "name": "Christophe Leroy (CS GROUP)", "email": "chleroy@kernel.org" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/0ee46bb228d97163fbdc14f2a7c52b93d8bc34ce.1777306795.git.chleroy@kernel.org/mbox/", "series": [ { "id": 501691, "url": "http://patchwork.ozlabs.org/api/1.1/series/501691/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=501691", "date": "2026-04-27T17:13:41", "name": "uaccess: Convert small fixed size copy_{to/from}_user() to scoped user access", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/501691/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2229050/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2229050/checks/", "tags": {}, "headers": { "Return-Path": "\n <linuxppc-dev+bounces-20182-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=kdO2kRaq;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org\n (client-ip=112.213.38.117; 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a=rsa-sha256; c=relaxed/simple; d=kernel.org;\n\ts=k20201202; t=1777310339;\n\tbh=VVuQn2YnZFi2JH9uh9hmEqXb1BpygsXabSyFGnhBvmI=;\n\th=From:To:Cc:Subject:Date:In-Reply-To:References:From;\n\tb=kdO2kRaqrKnrRzE/uOUoSc+QuIvBLF9bEcfUYb9jTJLWJk0AT883/0gLUkpYyvhxW\n\t JwKLSaa6O8znPG+ygzo4nQLM8J0f65SbAuU342P7t8CFNHOEuyufyC86uU6TKB6BuB\n\t gSew3oyOMPJ8ALphDrpzU/JPmVzf88NlkSTCpSsq0dGpC1oXnkppqU6so9I0ayHunG\n\t vmD6szQq9NnauXryTPXCD0GLKF95gnwZ47owOPgIM468cdafyYqaGorVn/T0ZUPF41\n\t utCUjd396YBehKkYMEmrRy4GP6QkmxuYFD7L2LBro+x9SzGKxh5BvzwrXlX1jpWNJG\n\t /RZq8/R9DjgcA==", "From": "\"Christophe Leroy (CS GROUP)\" <chleroy@kernel.org>", "To": "Yury Norov <ynorov@nvidia.com>,\n\tAndrew Morton <akpm@linux-foundation.org>,\n\tLinus Torvalds <torvalds@linux-foundation.org>,\n\tDavid Laight <david.laight.linux@gmail.com>,\n\tThomas Gleixner <tglx@linutronix.de>", "Cc": "\"Christophe Leroy (CS GROUP)\" <chleroy@kernel.org>,\n\tlinux-alpha@vger.kernel.org,\n\tlinux-kernel@vger.kernel.org,\n\tlinux-snps-arc@lists.infradead.org,\n\tlinux-arm-kernel@lists.infradead.org,\n\tlinux-mips@vger.kernel.org,\n\tlinuxppc-dev@lists.ozlabs.org,\n\tkvm@vger.kernel.org,\n\tlinux-riscv@lists.infradead.org,\n\tlinux-s390@vger.kernel.org,\n\tsparclinux@vger.kernel.org,\n\tlinux-um@lists.infradead.org,\n\tdmaengine@vger.kernel.org,\n\tlinux-efi@vger.kernel.org,\n\tlinux-fsi@lists.ozlabs.org,\n\tamd-gfx@lists.freedesktop.org,\n\tdri-devel@lists.freedesktop.org,\n\tintel-gfx@lists.freedesktop.org,\n\tlinux-wpan@vger.kernel.org,\n\tnetdev@vger.kernel.org,\n\tlinux-wireless@vger.kernel.org,\n\tlinux-spi@vger.kernel.org,\n\tlinux-media@vger.kernel.org,\n\tlinux-staging@lists.linux.dev,\n\tlinux-serial@vger.kernel.org,\n\tlinux-usb@vger.kernel.org,\n\txen-devel@lists.xenproject.org,\n\tlinux-fsdevel@vger.kernel.org,\n\tocfs2-devel@lists.linux.dev,\n\tbpf@vger.kernel.org,\n\tkasan-dev@googlegroups.com,\n\tlinux-mm@kvack.org,\n\tlinux-x25@vger.kernel.org,\n\trust-for-linux@vger.kernel.org,\n\tlinux-sound@vger.kernel.org,\n\tsound-open-firmware@alsa-project.org,\n\tlinux-csky@vger.kernel.org,\n\tlinux-hexagon@vger.kernel.org,\n\tloongarch@lists.linux.dev,\n\tlinux-m68k@lists.linux-m68k.org,\n\tlinux-openrisc@vger.kernel.org,\n\tlinux-parisc@vger.kernel.org,\n\tlinux-sh@vger.kernel.org,\n\tlinux-arch@vger.kernel.org", "Subject": "[RFC PATCH v1 7/9] x86: Add unsafe_copy_from_user()", "Date": "Mon, 27 Apr 2026 19:13:48 +0200", "Message-ID": "\n <0ee46bb228d97163fbdc14f2a7c52b93d8bc34ce.1777306795.git.chleroy@kernel.org>", "X-Mailer": "git-send-email 2.49.0", "In-Reply-To": "<cover.1777306795.git.chleroy@kernel.org>", "References": "<cover.1777306795.git.chleroy@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", "X-Developer-Signature": "v=1; a=openpgp-sha256; l=2390; i=chleroy@kernel.org;\n h=from:subject:message-id; bh=VVuQn2YnZFi2JH9uh9hmEqXb1BpygsXabSyFGnhBvmI=;\n b=owGbwMvMwCV2d0KB2p7V54MZT6slMWS+nxljeGSBfXj99HCNy2WTVFXXC9z/Hmi+//aE1/MbC\n +50nw1Q6ChlYRDjYpAVU2Q5/p9714yuL6n5U3fpw8xhZQIZwsDFKQAT2djH8D+e3yYgNP/F6xtd\n z9QNXjIccVycwR574E38S3tWp2uq95Yy/M9xKJ2hYJCUJV9391rVwmlfl7x6GzD19bqwZeyVdgF\n fZ3MAAA==", "X-Developer-Key": "i=chleroy@kernel.org; a=openpgp;\n fpr=10FFE6F8B390DE17ACC2632368A92FEB01B8DD78", "Content-Transfer-Encoding": "8bit", "X-Spam-Status": "No, score=-0.2 required=5.0 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", "X-Spam-Checker-Version": "SpamAssassin 4.0.1 (2024-03-25) on lists.ozlabs.org" }, "content": "At the time being, x86 and arm64 are missing unsafe_copy_from_user().\n\nAdd it.\n\nSigned-off-by: Christophe Leroy (CS GROUP) <chleroy@kernel.org>\n---\n arch/x86/include/asm/uaccess.h | 29 ++++++++++++++++++++++++-----\n 1 file changed, 24 insertions(+), 5 deletions(-)", "diff": "diff --git a/arch/x86/include/asm/uaccess.h b/arch/x86/include/asm/uaccess.h\nindex 3a0dd3c2b233..10c458ffa399 100644\n--- a/arch/x86/include/asm/uaccess.h\n+++ b/arch/x86/include/asm/uaccess.h\n@@ -598,7 +598,7 @@ _label:\t\t\t\t\t\t\t\t\t\\\n * We want the unsafe accessors to always be inlined and use\n * the error labels - thus the macro games.\n */\n-#define unsafe_copy_loop(dst, src, len, type, label)\t\t\t\t\\\n+#define unsafe_put_loop(dst, src, len, type, label)\t\t\t\t\\\n \twhile (len >= sizeof(type)) {\t\t\t\t\t\t\\\n \t\tunsafe_put_user(*(type *)(src),(type __user *)(dst),label);\t\\\n \t\tdst += sizeof(type);\t\t\t\t\t\t\\\n@@ -611,10 +611,29 @@ do {\t\t\t\t\t\t\t\t\t\\\n \tchar __user *__ucu_dst = (_dst);\t\t\t\t\\\n \tconst char *__ucu_src = (_src);\t\t\t\t\t\\\n \tsize_t __ucu_len = (_len);\t\t\t\t\t\\\n-\tunsafe_copy_loop(__ucu_dst, __ucu_src, __ucu_len, u64, label);\t\\\n-\tunsafe_copy_loop(__ucu_dst, __ucu_src, __ucu_len, u32, label);\t\\\n-\tunsafe_copy_loop(__ucu_dst, __ucu_src, __ucu_len, u16, label);\t\\\n-\tunsafe_copy_loop(__ucu_dst, __ucu_src, __ucu_len, u8, label);\t\\\n+\tunsafe_put_loop(__ucu_dst, __ucu_src, __ucu_len, u64, label);\t\\\n+\tunsafe_put_loop(__ucu_dst, __ucu_src, __ucu_len, u32, label);\t\\\n+\tunsafe_put_loop(__ucu_dst, __ucu_src, __ucu_len, u16, label);\t\\\n+\tunsafe_put_loop(__ucu_dst, __ucu_src, __ucu_len, u8, label);\t\\\n+} while (0)\n+\n+#define unsafe_get_loop(dst, src, len, type, label)\t\t\t\t\\\n+\twhile (len >= sizeof(type)) {\t\t\t\t\t\t\\\n+\t\tunsafe_get_user(*(type __user *)(src),(type *)(dst),label);\t\\\n+\t\tdst += sizeof(type);\t\t\t\t\t\t\\\n+\t\tsrc += sizeof(type);\t\t\t\t\t\t\\\n+\t\tlen -= sizeof(type);\t\t\t\t\t\t\\\n+\t}\n+\n+#define unsafe_copy_from_user(_dst,_src,_len,label)\t\t\t\\\n+do {\t\t\t\t\t\t\t\t\t\\\n+\tchar *__ucu_dst = (_dst);\t\t\t\t\t\\\n+\tconst char __user *__ucu_src = (_src);\t\t\t\t\\\n+\tsize_t __ucu_len = (_len);\t\t\t\t\t\\\n+\tunsafe_get_loop(__ucu_dst, __ucu_src, __ucu_len, u64, label);\t\\\n+\tunsafe_get_loop(__ucu_dst, __ucu_src, __ucu_len, u32, label);\t\\\n+\tunsafe_get_loop(__ucu_dst, __ucu_src, __ucu_len, u16, label);\t\\\n+\tunsafe_get_loop(__ucu_dst, __ucu_src, __ucu_len, u8, label);\t\\\n } while (0)\n \n #ifdef CONFIG_CC_HAS_ASM_GOTO_OUTPUT\n", "prefixes": [ "RFC", "v1", "7/9" ] }