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GET /api/1.1/patches/2222558/?format=api
{ "id": 2222558, "url": "http://patchwork.ozlabs.org/api/1.1/patches/2222558/?format=api", "web_url": "http://patchwork.ozlabs.org/project/uboot/patch/20260412195947.1982729-5-ravi@prevas.dk/", "project": { "id": 18, "url": "http://patchwork.ozlabs.org/api/1.1/projects/18/?format=api", "name": "U-Boot", "link_name": "uboot", "list_id": "u-boot.lists.denx.de", "list_email": "u-boot@lists.denx.de", "web_url": null, "scm_url": null, "webscm_url": null }, "msgid": "<20260412195947.1982729-5-ravi@prevas.dk>", "date": "2026-04-12T19:59:43", "name": "[4/8] lib/string.c: introduce memdup_nul() helper", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "c963515c764157c1ccaabbf680e53ce3aaab9eee", "submitter": { "id": 89443, "url": "http://patchwork.ozlabs.org/api/1.1/people/89443/?format=api", "name": "Rasmus Villemoes", "email": "ravi@prevas.dk" }, "delegate": { "id": 3651, "url": "http://patchwork.ozlabs.org/api/1.1/users/3651/?format=api", "username": "trini", "first_name": "Tom", "last_name": "Rini", "email": "trini@ti.com" }, "mbox": "http://patchwork.ozlabs.org/project/uboot/patch/20260412195947.1982729-5-ravi@prevas.dk/mbox/", "series": [ { "id": 499629, "url": "http://patchwork.ozlabs.org/api/1.1/series/499629/?format=api", "web_url": "http://patchwork.ozlabs.org/project/uboot/list/?series=499629", "date": "2026-04-12T19:59:41", "name": "add memdup_nul(), use it and memdup() in a few places", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/499629/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2222558/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2222558/checks/", "tags": {}, "headers": { "Return-Path": "<u-boot-bounces@lists.denx.de>", "X-Original-To": "incoming@patchwork.ozlabs.org", "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=prevas.dk header.i=@prevas.dk 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"u-boot@lists.denx.de", "Cc": "Tom Rini <trini@konsulko.com>, Simon Glass <sjg@chromium.org>,\n Rasmus Villemoes <ravi@prevas.dk>", "Subject": "[PATCH 4/8] lib/string.c: introduce memdup_nul() helper", "Date": "Sun, 12 Apr 2026 21:59:43 +0200", "Message-ID": "<20260412195947.1982729-5-ravi@prevas.dk>", "X-Mailer": "git-send-email 2.53.0", "In-Reply-To": "<20260412195947.1982729-1-ravi@prevas.dk>", "References": "<20260412195947.1982729-1-ravi@prevas.dk>", "Content-Transfer-Encoding": "8bit", "Content-Type": "text/plain", "X-ClientProxiedBy": "CPBP307CA0001.DNKP307.PROD.OUTLOOK.COM\n (2603:10a6:380:1::11) To AS5PR10MB8243.EURPRD10.PROD.OUTLOOK.COM\n (2603:10a6:20b:681::18)", "MIME-Version": "1.0", "X-MS-PublicTrafficType": "Email", "X-MS-TrafficTypeDiagnostic": "AS5PR10MB8243:EE_|GV2PR10MB9930:EE_", "X-MS-Office365-Filtering-Correlation-Id": "db4a2bba-4169-4b38-55ce-08de98ce135f", "X-MS-Exchange-SenderADCheck": "1", "X-MS-Exchange-AntiSpam-Relay": "0", "X-Microsoft-Antispam": "BCL:0;\n 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"X-OriginatorOrg": "prevas.dk", "X-MS-Exchange-CrossTenant-Network-Message-Id": "\n db4a2bba-4169-4b38-55ce-08de98ce135f", "X-MS-Exchange-CrossTenant-AuthSource": "AS5PR10MB8243.EURPRD10.PROD.OUTLOOK.COM", "X-MS-Exchange-CrossTenant-AuthAs": "Internal", "X-MS-Exchange-CrossTenant-OriginalArrivalTime": "12 Apr 2026 19:59:58.9486 (UTC)", "X-MS-Exchange-CrossTenant-FromEntityHeader": "Hosted", "X-MS-Exchange-CrossTenant-Id": "d350cf71-778d-4780-88f5-071a4cb1ed61", "X-MS-Exchange-CrossTenant-MailboxType": "HOSTED", "X-MS-Exchange-CrossTenant-UserPrincipalName": "\n hkz06hmskh24zzKX8veRfdat8U3fImTrUgiPhgqcBeH/byGLpnmabUvFfd1d51dTCVc/0o9urhpS3SR5SQUlqIhqYL3HVpVrCboWWtFtD54=", "X-MS-Exchange-Transport-CrossTenantHeadersStamped": "GV2PR10MB9930", "X-BeenThere": "u-boot@lists.denx.de", "X-Mailman-Version": "2.1.39", "Precedence": "list", "List-Id": "U-Boot discussion <u-boot.lists.denx.de>", "List-Unsubscribe": "<https://lists.denx.de/options/u-boot>,\n <mailto:u-boot-request@lists.denx.de?subject=unsubscribe>", "List-Archive": "<https://lists.denx.de/pipermail/u-boot/>", "List-Post": "<mailto:u-boot@lists.denx.de>", "List-Help": "<mailto:u-boot-request@lists.denx.de?subject=help>", "List-Subscribe": "<https://lists.denx.de/listinfo/u-boot>,\n <mailto:u-boot-request@lists.denx.de?subject=subscribe>", "Errors-To": "u-boot-bounces@lists.denx.de", "Sender": "\"U-Boot\" <u-boot-bounces@lists.denx.de>", "X-Virus-Scanned": "clamav-milter 0.103.8 at phobos.denx.de", "X-Virus-Status": "Clean" }, "content": "This is completely analogous to the linux kernel's kmemdup_nul()\nhelper, apart from the lack of the gfp_t argument: Allocate a buffer\nof size {len}+1, copy {len} bytes from the given buffer, and add a\nfinal nul byte.\n\nThis pattern exists in a number of places, so this helper can reduce\nsome boilerplate code.\n\nSigned-off-by: Rasmus Villemoes <ravi@prevas.dk>\n---\n include/linux/string.h | 13 +++++++++++++\n lib/string.c | 15 +++++++++++++++\n 2 files changed, 28 insertions(+)", "diff": "diff --git a/include/linux/string.h b/include/linux/string.h\nindex a28150fa578..b2e38ecf26e 100644\n--- a/include/linux/string.h\n+++ b/include/linux/string.h\n@@ -143,6 +143,19 @@ void *memchr_inv(const void *, int, size_t);\n */\n void *memdup(const void *src, size_t len);\n \n+/**\n+ * memdup_nul() - allocate a buffer and copy in the contents, appending a nul byte\n+ *\n+ * Note that this returns a valid pointer even if @len is 0\n+ *\n+ * @src: data to copy in\n+ * @len: number of bytes to copy\n+ * Return: allocated buffer with the copied contents and an extra nul byte,\n+ * or NULL if not enough memory is available\n+ *\n+ */\n+void *memdup_nul(const void *src, size_t len);\n+\n unsigned long ustrtoul(const char *cp, char **endp, unsigned int base);\n unsigned long long ustrtoull(const char *cp, char **endp, unsigned int base);\n \ndiff --git a/lib/string.c b/lib/string.c\nindex 2c1baa568b9..3923cce5561 100644\n--- a/lib/string.c\n+++ b/lib/string.c\n@@ -343,6 +343,21 @@ size_t strcspn(const char *s, const char *reject)\n }\n #endif\n \n+void *memdup_nul(const void *src, size_t len)\n+{\n+\tchar *dst;\n+\n+\tif (len + 1 < len)\n+\t\treturn NULL;\n+\n+\tdst = malloc(len + 1);\n+\tif (!dst)\n+\t\treturn NULL;\n+\n+\tdst[len] = '\\0';\n+\treturn memcpy(dst, src, len);\n+}\n+\n char * strdup(const char *s)\n {\n \tchar *new;\n", "prefixes": [ "4/8" ] }