linux-kernel - [PATCH] virt: acrn: add hotplug

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Date:   Thu, 25 Feb 2021 14:38:30 +0100
From:   Arnd Bergmann <arnd@...nel.org>
To:     Shuo Liu <shuo.a.liu@...el.com>,
        Reinette Chatre <reinette.chatre@...el.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Arnd Bergmann <arnd@...db.de>, Zhi Wang <zhi.a.wang@...el.com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH] virt: acrn: add hotplug_cpu dependency

From: Arnd Bergmann <arnd@...db.de>

Without CPU hotplug, acrn fails to build:

drivers/virt/acrn/hsm.c:389:3: error: implicit declaration of function 'remove_cpu' [-Werror,-Wimplicit-function-declaration]
                remove_cpu(cpu);
                ^
drivers/virt/acrn/hsm.c:402:2: error: implicit declaration of function 'add_cpu' [-Werror,-Wimplicit-function-declaration]
        add_cpu(cpu);
        ^

Enforce the dependency through Kconfig to avoid the build failure.

Fixes: 666834c47d3b ("virt: acrn: Introduce ACRN HSM basic driver")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 drivers/virt/acrn/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/virt/acrn/Kconfig b/drivers/virt/acrn/Kconfig
index 3e1a61c9d8d8..fbb0e3234aaf 100644
--- a/drivers/virt/acrn/Kconfig
+++ b/drivers/virt/acrn/Kconfig
@@ -2,6 +2,7 @@
 config ACRN_HSM
 	tristate "ACRN Hypervisor Service Module"
 	depends on ACRN_GUEST
+	depends on HOTPLUG_CPU
 	select EVENTFD
 	help
 	  ACRN Hypervisor Service Module (HSM) is a kernel module which
-- 
2.29.2