From: Arnd Bergmann <arnd@kernel.org>
To: "Rafael J. Wysocki" <rafael@kernel.org>,
Jonathan Cameron <jonathan.cameron@huawei.com>,
Chengwen Feng <fengchengwen@huawei.com>
Cc: Arnd Bergmann <arnd@arndb.de>, Len Brown <lenb@kernel.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Gavin Shan <gshan@redhat.com>,
Shaopeng Tan <tan.shaopeng@jp.fujitsu.com>,
James Morse <james.morse@arm.com>, Marc Zyngier <maz@kernel.org>,
Kees Cook <kees@kernel.org>, Ben Horgan <ben.horgan@arm.com>,
Dave Jiang <dave.jiang@intel.com>,
Sakari Ailus <sakari.ailus@linux.intel.com>,
linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH] ACPI: add acpi_get_cpu_uid() stub helper
Date: Mon, 13 Apr 2026 09:01:26 +0200 [thread overview]
Message-ID: <20260413070132.3828606-1-arnd@kernel.org> (raw)
From: Arnd Bergmann <arnd@arndb.de>
When ACPI is disabled, x86 Xen support fails to build:
arch/x86/xen/enlighten_hvm.c: In function 'xen_cpu_up_prepare_hvm':
arch/x86/xen/enlighten_hvm.c:165:13: error: implicit declaration of function 'acpi_get_cpu_uid' [-Wimplicit-function-declaration]
165 | if (acpi_get_cpu_uid(cpu, &cpu_uid) == 0)
| ^~~~~~~~~~~~~~~~
Add a trivial stub that can be used in place of the real function.
Fixes: f652d0a4e13c ("ACPI: Centralize acpi_get_cpu_uid() declaration in include/linux/acpi.h")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
include/linux/acpi.h | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index 0afab1a2ad8e..4e5e0ff4c887 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -964,6 +964,12 @@ static inline int acpi_table_parse(char *id,
return -ENODEV;
}
+static inline int acpi_get_cpu_uid(unsigned int cpu, u32 *uid)
+{
+ *uid = cpu;
+ return 0;
+}
+
static inline int acpi_nvs_register(__u64 start, __u64 size)
{
return 0;
--
2.39.5
next reply other threads:[~2026-04-13 7:01 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-13 7:01 Arnd Bergmann [this message]
2026-04-13 11:41 ` [PATCH] ACPI: add acpi_get_cpu_uid() stub helper fengchengwen
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