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GET /api/1.2/patches/2221802/?format=api
{ "id": 2221802, "url": "http://patchwork.ozlabs.org/api/1.2/patches/2221802/?format=api", "web_url": "http://patchwork.ozlabs.org/project/sparclinux/patch/20260410120317.642797961@kernel.org/", "project": { "id": 10, "url": "http://patchwork.ozlabs.org/api/1.2/projects/10/?format=api", "name": "Linux SPARC Development ", "link_name": "sparclinux", "list_id": "sparclinux.vger.kernel.org", "list_email": "sparclinux@vger.kernel.org", "web_url": null, "scm_url": null, "webscm_url": null, "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260410120317.642797961@kernel.org>", "list_archive_url": null, "date": "2026-04-10T12:18:32", "name": "[01/38] percpu: Sanitize __percpu_qual include hell", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "a3773f87c5f5b28b99c6c05ad15ff1c2f679d0ef", "submitter": { "id": 92397, "url": "http://patchwork.ozlabs.org/api/1.2/people/92397/?format=api", "name": "Thomas Gleixner", "email": "tglx@kernel.org" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/sparclinux/patch/20260410120317.642797961@kernel.org/mbox/", "series": [ { "id": 499450, "url": "http://patchwork.ozlabs.org/api/1.2/series/499450/?format=api", "web_url": "http://patchwork.ozlabs.org/project/sparclinux/list/?series=499450", "date": "2026-04-10T12:18:27", "name": "treewide: Cleanup LATCH, CLOCK_TICK_RATE and get_cycles() [ab]use", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/499450/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2221802/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2221802/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <SRS0=7y87=CJ=vger.kernel.org=sparclinux+bounces-6649-patchwork-incoming=ozlabs.org@ozlabs.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "sparclinux@vger.kernel.org" ], "Delivered-To": [ "patchwork-incoming@legolas.ozlabs.org", "patchwork-incoming@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=PujwWQLA;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=ozlabs.org\n (client-ip=150.107.74.76; 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arc=none smtp.client-ip=10.30.226.201" ], "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org;\n\ts=k20201202; t=1775823515;\n\tbh=Qxe5s7KoLSq5kG1N2smycXiRWybB8taeJTlNsbfy0fg=;\n\th=Date:From:To:Cc:Subject:References:From;\n\tb=PujwWQLA2dOIyLlZvIM0oB1Wg7c5ZIyCwzH/XHGNRGehg+YFil6OmFstHyfDwz6a4\n\t UXi7viGoUKPW4HP65M0H75qRplTYAji9Z6ikhUQOkcZXvM13Netjmq5O6I/+9+JQ+w\n\t bxUrL+dmChTEREYE3VSmYBwXmygVivr7jmb4e0itrCIHXq31ae3WiG49uZ0Z2PTGdc\n\t +od1M1yaD34oi/oFSPoyZ73JAQOxw0kf9oLJ4YVR9wqn75mlEWMpZuBIxST6yrXcHs\n\t fYRNY0LFjGxQtZU4+RTQobyzbJWEzJNsARBCqXSJyY40dbr06WXMHmkuYa6yNGx2XV\n\t 5kZ5/s9dunCZA==", "Date": "Fri, 10 Apr 2026 14:18:32 +0200", "Message-ID": "<20260410120317.642797961@kernel.org>", "User-Agent": "quilt/0.68", "From": "Thomas Gleixner <tglx@kernel.org>", "To": "LKML <linux-kernel@vger.kernel.org>", "Cc": "Arnd Bergmann <arnd@arndb.de>,\n x86@kernel.org,\n Lu Baolu <baolu.lu@linux.intel.com>,\n iommu@lists.linux.dev,\n Michael Grzeschik <m.grzeschik@pengutronix.de>,\n netdev@vger.kernel.org,\n linux-wireless@vger.kernel.org,\n Herbert Xu <herbert@gondor.apana.org.au>,\n linux-crypto@vger.kernel.org,\n Vlastimil Babka <vbabka@kernel.org>,\n linux-mm@kvack.org,\n David Woodhouse <dwmw2@infradead.org>,\n Bernie Thompson <bernie@plugable.com>,\n linux-fbdev@vger.kernel.org,\n \"Theodore Tso\" <tytso@mit.edu>,\n linux-ext4@vger.kernel.org,\n Andrew Morton <akpm@linux-foundation.org>,\n Uladzislau Rezki <urezki@gmail.com>,\n Marco Elver <elver@google.com>,\n Dmitry Vyukov <dvyukov@google.com>,\n kasan-dev@googlegroups.com,\n Andrey Ryabinin <ryabinin.a.a@gmail.com>,\n Thomas Sailer <t.sailer@alumni.ethz.ch>,\n linux-hams@vger.kernel.org,\n \"Jason A. Donenfeld\" <Jason@zx2c4.com>,\n Richard Henderson <richard.henderson@linaro.org>,\n linux-alpha@vger.kernel.org,\n Russell King <linux@armlinux.org.uk>,\n linux-arm-kernel@lists.infradead.org,\n Catalin Marinas <catalin.marinas@arm.com>,\n Huacai Chen <chenhuacai@kernel.org>,\n loongarch@lists.linux.dev,\n Geert Uytterhoeven <geert@linux-m68k.org>,\n linux-m68k@lists.linux-m68k.org,\n Dinh Nguyen <dinguyen@kernel.org>,\n Jonas Bonn <jonas@southpole.se>,\n linux-openrisc@vger.kernel.org,\n Helge Deller <deller@gmx.de>,\n linux-parisc@vger.kernel.org,\n Michael Ellerman <mpe@ellerman.id.au>,\n linuxppc-dev@lists.ozlabs.org,\n Paul Walmsley <pjw@kernel.org>,\n linux-riscv@lists.infradead.org,\n Heiko Carstens <hca@linux.ibm.com>,\n linux-s390@vger.kernel.org,\n \"David S. Miller\" <davem@davemloft.net>,\n sparclinux@vger.kernel.org", "Subject": "[patch 01/38] percpu: Sanitize __percpu_qual include hell", "References": "<20260410120044.031381086@kernel.org>", "Precedence": "bulk", "X-Mailing-List": "sparclinux@vger.kernel.org", "List-Id": "<sparclinux.vger.kernel.org>", "List-Subscribe": "<mailto:sparclinux+subscribe@vger.kernel.org>", "List-Unsubscribe": "<mailto:sparclinux+unsubscribe@vger.kernel.org>", "MIME-Version": "1.0", "Content-Type": "text/plain; charset=UTF-8", "X-Spam-Status": "No, score=-1.2 required=5.0 tests=ARC_SIGNED,ARC_VALID,\n\tDKIMWL_WL_HIGH,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DMARC_PASS,\n\tMAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=disabled\n\tversion=4.0.1", "X-Spam-Checker-Version": "SpamAssassin 4.0.1 (2024-03-25) on gandalf.ozlabs.org" }, "content": "Slapping __percpu_qual into the next available header is sloppy at best.\n\nIt's required by __percpu which is defined in compiler_types.h and that is\nmeant to be included without requiring a boatload of other headers so that\na struct or function declaration can contain a __percpu qualifier w/o\nfurther prerequisites.\n\nThis implicit dependency on linux/percpu.h makes that impossible and causes\na major problem when trying to seperate headers.\n\nCreate asm/percpu_types.h and move it there. Include that from\ncompiler_types.h and the whole recursion problem goes away.\n\nSigned-off-by: Thomas Gleixner <tglx@kernel.org\nCc: Arnd Bergmann <arnd@arndb.de>\n---\n arch/x86/include/asm/percpu.h | 5 -----\n arch/x86/include/asm/percpu_types.h | 17 +++++++++++++++++\n include/asm-generic/Kbuild | 1 +\n include/asm-generic/percpu_types.h | 20 ++++++++++++++++++++\n include/linux/compiler_types.h | 1 +\n 5 files changed, 39 insertions(+), 5 deletions(-)", "diff": "--- a/arch/x86/include/asm/percpu.h\n+++ b/arch/x86/include/asm/percpu.h\n@@ -40,12 +40,10 @@\n #endif\n \n #define __percpu_prefix\n-#define __percpu_seg_override\tCONCATENATE(__seg_, __percpu_seg)\n \n #else /* !CONFIG_CC_HAS_NAMED_AS: */\n \n #define __percpu_prefix\t\t__force_percpu_prefix\n-#define __percpu_seg_override\n \n #endif /* CONFIG_CC_HAS_NAMED_AS */\n \n@@ -82,7 +80,6 @@\n \n #define __force_percpu_prefix\n #define __percpu_prefix\n-#define __percpu_seg_override\n \n #define PER_CPU_VAR(var)\t(var)__percpu_rel\n \n@@ -92,8 +89,6 @@\n # define __my_cpu_type(var)\ttypeof(var)\n # define __my_cpu_ptr(ptr)\t(ptr)\n # define __my_cpu_var(var)\t(var)\n-\n-# define __percpu_qual\t\t__percpu_seg_override\n #else\n # define __my_cpu_type(var)\ttypeof(var) __percpu_seg_override\n # define __my_cpu_ptr(ptr)\t(__my_cpu_type(*(ptr))*)(__force uintptr_t)(ptr)\n--- /dev/null\n+++ b/arch/x86/include/asm/percpu_types.h\n@@ -0,0 +1,17 @@\n+/* SPDX-License-Identifier: GPL-2.0 */\n+#ifndef _ASM_X86_PERCPU_TYPES_H\n+#define _ASM_X86_PERCPU_TYPES_H\n+\n+#if defined(CONFIG_SMP) && defined(CONFIG_CC_HAS_NAMED_AS)\n+#define __percpu_seg_override\tCONCATENATE(__seg_, __percpu_seg)\n+#else /* !CONFIG_CC_HAS_NAMED_AS: */\n+#define __percpu_seg_override\n+#endif\n+\n+#if defined(CONFIG_USE_X86_SEG_SUPPORT) && defined(USE_TYPEOF_UNQUAL)\n+#define __percpu_qual\t\t__percpu_seg_override\n+#endif\n+\n+#include <asm-generic/percpu_types.h>\n+\n+#endif\n--- a/include/asm-generic/Kbuild\n+++ b/include/asm-generic/Kbuild\n@@ -44,6 +44,7 @@ mandatory-y += module.lds.h\n mandatory-y += msi.h\n mandatory-y += pci.h\n mandatory-y += percpu.h\n+mandatory-y += percpu_types.h\n mandatory-y += pgalloc.h\n mandatory-y += preempt.h\n mandatory-y += rqspinlock.h\n--- /dev/null\n+++ b/include/asm-generic/percpu_types.h\n@@ -0,0 +1,20 @@\n+/* SPDX-License-Identifier: GPL-2.0 */\n+#ifndef _ASM_GENERIC_PERCPU_TYPES_H_\n+#define _ASM_GENERIC_PERCPU_TYPES_H_\n+\n+#ifndef __ASSEMBLER__\n+/*\n+ * __percpu_qual is the qualifier for the percpu named address space.\n+ *\n+ * Most arches use generic named address space for percpu variables but\n+ * some arches define percpu variables in different named address space\n+ * (on the x86 arch, percpu variable may be declared as being relative\n+ * to the %fs or %gs segments using __seg_fs or __seg_gs named address\n+ * space qualifier).\n+ */\n+#ifndef __percpu_qual\n+# define __percpu_qual\n+#endif\n+\n+#endif /* __ASSEMBLER__ */\n+#endif /* _ASM_GENERIC_PERCPU_TYPES_H_ */\n--- a/include/linux/compiler_types.h\n+++ b/include/linux/compiler_types.h\n@@ -41,6 +41,7 @@\n # define BTF_TYPE_TAG(value) /* nothing */\n #endif\n \n+#include <asm/percpu_types.h>\n #include <linux/compiler-context-analysis.h>\n \n /* sparse defines __CHECKER__; see Documentation/dev-tools/sparse.rst */\n", "prefixes": [ "01/38" ] }