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GET /api/1.1/patches/2222834/?format=api
{ "id": 2222834, "url": "http://patchwork.ozlabs.org/api/1.1/patches/2222834/?format=api", "web_url": "http://patchwork.ozlabs.org/project/uboot/patch/20260413203555.1990337-3-rs@ti.com/", "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": "<20260413203555.1990337-3-rs@ti.com>", "date": "2026-04-13T20:35:51", "name": "[PATCHv3,2/6] lmb: add LMB_FDT for fdt reserved regions", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "68257babdf303105465815ba8378f39c2d26c5a2", "submitter": { "id": 88727, "url": "http://patchwork.ozlabs.org/api/1.1/people/88727/?format=api", "name": "Randolph Sapp", "email": "rs@ti.com" }, "delegate": { "id": 68728, "url": "http://patchwork.ozlabs.org/api/1.1/users/68728/?format=api", "username": "xypron", "first_name": "Heinrich", "last_name": "Schuchardt", "email": "xypron.glpk@gmx.de" }, "mbox": "http://patchwork.ozlabs.org/project/uboot/patch/20260413203555.1990337-3-rs@ti.com/mbox/", "series": [ { "id": 499752, "url": "http://patchwork.ozlabs.org/api/1.1/series/499752/?format=api", "web_url": "http://patchwork.ozlabs.org/project/uboot/list/?series=499752", "date": "2026-04-13T20:35:52", "name": "various memory related fixups", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/499752/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2222834/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2222834/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=ti.com header.i=@ti.com header.a=rsa-sha256\n header.s=selector1 header.b=RyV6OnuS;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.denx.de\n (client-ip=2a01:238:438b:c500:173d:9f52:ddab:ee01; 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helo=flwvzet201.ext.ti.com; pr=C", "From": "<rs@ti.com>", "To": "<robertcnelson@gmail.com>, <ayush@beagleboard.org>,\n <Erik.Welsh@octavosystems.com>, <anshuld@ti.com>, <bb@ti.com>,\n <trini@konsulko.com>, <afd@ti.com>, <xypron.glpk@gmx.de>,\n <ilias.apalodimas@linaro.org>", "CC": "<u-boot@lists.denx.de>", "Subject": "[PATCHv3 2/6] lmb: add LMB_FDT for fdt reserved regions", "Date": "Mon, 13 Apr 2026 15:35:51 -0500", "Message-ID": "<20260413203555.1990337-3-rs@ti.com>", "X-Mailer": "git-send-email 2.53.0", "In-Reply-To": "<20260413203555.1990337-1-rs@ti.com>", "References": "<20260413203555.1990337-1-rs@ti.com>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "Content-Type": "text/plain", "X-C2ProcessedOrg": "333ef613-75bf-4e12-a4b1-8e3623f5dcea", "X-EOPAttributedMessage": "0", "X-MS-PublicTrafficType": "Email", "X-MS-TrafficTypeDiagnostic": "SJ5PEPF000001F2:EE_|DS0PR10MB7320:EE_", "X-MS-Office365-Filtering-Correlation-Id": "861ba52c-fe1b-4222-84f4-08de999c52ea", "X-MS-Exchange-SenderADCheck": "1", "X-MS-Exchange-AntiSpam-Relay": "0", "X-Microsoft-Antispam": "BCL:0;\n ARA:13230040|1800799024|376014|36860700016|82310400026|56012099003|22082099003|18002099003;", "X-Microsoft-Antispam-Message-Info": "\n SNpJSC3VTQWQe8Fe4XqZsxWYIE/o1+D58kU9/3tgsGulRjuPgTlDgkIGJRaoo/K0VsjEXyKD3tBWBroHXkZk7YepcDQZDH5T+8o1hGADaXw6i1zAaAegHDKE46zg+sacNm/jeuiSv9E6goTC/HzXleC8iXa+amZZpLwp3UE6kasDSte/JjOJGv9BP0JtdD0eus7MD/XMR/DCEze8XnL/fr8Q43BujHG4ilUWxkH/hU1imgAZcDa4PGu0fmiY8J9F0RQhAB1aAj5nYXSWKv5LtdvXHWTZKgk1AqpRodfY1oql9P4tV0XbXo90Enpwr/E1iDw4Fg9PzT9nmjBAjDtAEinLVPlJ0oAVVV2+mgd71tnhIeBv7NKGenUvw6NQu1TL5kgISTp068C86G5IvXN0BKfO2VdzdTROJjdtHzYz3/2Jpwg5ht1MOKhLlmSlUDqT0/4w3G4jG5HvUHHXQYo3m/ynno2CyqWhXWIz6MVRCXVcfEJkxl0ffXvP1VPMP2U63z9tHd8cmaB/Fbt24E5yF6mhps+wizsDvd0SG10KCbpNdgwJp+HqbbyqlKRtxmyAWMBp7XF9Nxqyjfnn1DYL/jqIrekmt10fgwDdsBaRyoKqp2Gqus8v3WDlbkW1B94+my9d0Qvzidqv8rRez+GMxX1JvDoRmKyifuqYj9cOXVmKapZgjI/wjtOisd0ka/W+6Khrm4OQG5ufeLPRUD3PvoKaiEFUd5r8mi3qpoXK2eikeCT02NxUNLSKFS/6rrlDqcPpSa2lqtUEprE0GHEf7Q==", "X-Forefront-Antispam-Report": "CIP:198.47.21.195; 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Ip=[198.47.21.195];\n Helo=[flwvzet201.ext.ti.com]", "X-MS-Exchange-CrossTenant-AuthSource": "\n SJ5PEPF000001F2.namprd05.prod.outlook.com", "X-MS-Exchange-CrossTenant-AuthAs": "Anonymous", "X-MS-Exchange-CrossTenant-FromEntityHeader": "HybridOnPrem", "X-MS-Exchange-Transport-CrossTenantHeadersStamped": "DS0PR10MB7320", "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": "From: Randolph Sapp <rs@ti.com>\n\nAdd an LMB_FDT bit for fdt reserved regions, so we can reclaim them when\nparsing a new device tree and properly warn people when a reservation\noverlaps with an existing allocation.\n\nIf we don't at least warn the user of these reservation failures,\nthere's a chance that this region could be freed and reallocated for\nsomething important later.\n\nThis useful warning mechanism was broken in:\n5a6aa7d5913 (\"boot: fdt: Handle already reserved memory in boot_fdt_reserve_region()\")\n\nSigned-off-by: Randolph Sapp <rs@ti.com>\n---\n boot/image-fdt.c | 5 ++++-\n include/lmb.h | 14 ++++++++++++++\n lib/lmb.c | 33 +++++++++++++++++++++++++++++----\n 3 files changed, 47 insertions(+), 5 deletions(-)", "diff": "diff --git a/boot/image-fdt.c b/boot/image-fdt.c\nindex a3a4fb8b558..0f5857f24d2 100644\n--- a/boot/image-fdt.c\n+++ b/boot/image-fdt.c\n@@ -73,6 +73,7 @@ static void boot_fdt_reserve_region(u64 addr, u64 size, u32 flags)\n {\n \tlong ret;\n \tphys_addr_t rsv_addr;\n+\tflags |= LMB_FDT;\n \n \trsv_addr = (phys_addr_t)addr;\n \tret = lmb_alloc_mem(LMB_MEM_ALLOC_ADDR, 0, &rsv_addr, size, flags);\n@@ -80,7 +81,7 @@ static void boot_fdt_reserve_region(u64 addr, u64 size, u32 flags)\n \t\tdebug(\" reserving fdt memory region: addr=%llx size=%llx flags=%x\\n\",\n \t\t (unsigned long long)addr,\n \t\t (unsigned long long)size, flags);\n-\t} else if (ret != -EEXIST && ret != -EINVAL) {\n+\t} else if (ret != -EINVAL) {\n \t\tputs(\"ERROR: reserving fdt memory region failed \");\n \t\tprintf(\"(addr=%llx size=%llx flags=%x)\\n\",\n \t\t (unsigned long long)addr,\n@@ -108,6 +109,8 @@ void boot_fdt_add_mem_rsv_regions(void *fdt_blob)\n \tif (fdt_check_header(fdt_blob) != 0)\n \t\treturn;\n \n+\tlmb_free_fdt_regions();\n+\n \t/* process memreserve sections */\n \ttotal = fdt_num_mem_rsv(fdt_blob);\n \tfor (i = 0; i < total; i++) {\ndiff --git a/include/lmb.h b/include/lmb.h\nindex 427d701bc30..c6a1fc1ca47 100644\n--- a/include/lmb.h\n+++ b/include/lmb.h\n@@ -51,6 +51,15 @@\n */\n #define LMB_NONOTIFY BIT(3)\n \n+/**\n+ * define LMB_FDT - reclaim this region with lmb_free_fdt_regions()\n+ *\n+ * LMB Memory region attribute flag to indicate that the region will be\n+ * reclaimed with lmb_free_fdt_regions(). This allows device tree reservations\n+ * to be cleaned up and tracked more granularly.\n+ */\n+#define LMB_FDT BIT(4)\n+\n /**\n * enum lmb_mem_type - type of memory allocation request\n * @LMB_MEM_ALLOC_ADDR:\trequest for a particular region of memory\n@@ -235,6 +244,11 @@ phys_addr_t io_lmb_alloc(struct lmb *io_lmb, phys_size_t size, ulong align);\n */\n long io_lmb_free(struct lmb *io_lmb, phys_addr_t base, phys_size_t size);\n \n+/**\n+ * lmb_free_fdt_regions() - Reclaim all %LMB_FDT tagged reserved regions\n+ */\n+void lmb_free_fdt_regions(void);\n+\n #endif /* __KERNEL__ */\n \n #endif /* _LINUX_LMB_H */\ndiff --git a/lib/lmb.c b/lib/lmb.c\nindex 8f12c6ad8e5..7ecc548d831 100644\n--- a/lib/lmb.c\n+++ b/lib/lmb.c\n@@ -463,10 +463,10 @@ static int lmb_map_update_notify(phys_addr_t addr, phys_size_t size,\n \n static void lmb_print_region_flags(u32 flags)\n {\n-\tconst char * const flag_str[] = { \"none\", \"no-map\", \"no-overwrite\",\n-\t\t\t\t\t \"no-notify\" };\n-\tunsigned int pflags = flags &\n-\t\t\t (LMB_NOMAP | LMB_NOOVERWRITE | LMB_NONOTIFY);\n+\tconst char *const flag_str[] = { \"none\", \"no-map\", \"no-overwrite\",\n+\t\t\t\t\t \"no-notify\", \"fdt\" };\n+\tunsigned int pflags =\n+\t\tflags & (LMB_NOMAP | LMB_NOOVERWRITE | LMB_NONOTIFY | LMB_FDT);\n \n \tif (flags != pflags) {\n \t\tprintf(\"invalid %#x\\n\", flags);\n@@ -654,6 +654,31 @@ long lmb_free(phys_addr_t base, phys_size_t size, u32 flags)\n \treturn lmb_map_update_notify(base, size, LMB_MAP_OP_FREE, flags);\n }\n \n+void lmb_free_fdt_regions(void)\n+{\n+\tstruct alist *lmb_rgn_lst = &lmb.used_mem;\n+\tstruct lmb_region *rgn = lmb_rgn_lst->data;\n+\tlong ret;\n+\tint i = 0;\n+\n+\twhile (i < lmb_rgn_lst->count) {\n+\t\tphys_addr_t base = rgn[i].base;\n+\t\tphys_size_t size = rgn[i].size;\n+\t\tu32 flags = rgn[i].flags;\n+\n+\t\tif (flags & LMB_FDT) {\n+\t\t\tret = lmb_free(base, size, flags);\n+\t\t\tif (ret < 0) {\n+\t\t\t\tprintf(\"Unable to free FDT memory at 0x%08lx\\n\",\n+\t\t\t\t (ulong)base);\n+\t\t\t\ti++;\n+\t\t\t}\n+\t\t} else {\n+\t\t\ti++;\n+\t\t}\n+\t}\n+}\n+\n static int _lmb_alloc_base(phys_size_t size, ulong align,\n \t\t\t phys_addr_t *addr, u32 flags)\n {\n", "prefixes": [ "PATCHv3", "2/6" ] }