linux-kernel - [PATCH] cpu/hotplug: Non-SMP machines do not make use of booted

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Date:   Wed, 15 Aug 2018 00:26:00 +0300
From:   Abel Vesa <abelvesa@...ux.com>
To:     Thomas Gleixner <tglx@...utronix.de>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...nel.org>,
        Lai Jiangshan <jiangshanlai@...il.com>,
        Brendan Jackman <brendan.jackman@....com>,
        Arnd Bergmann <arnd@...db.de>, linux-kernel@...r.kernel.org
Subject: [PATCH] cpu/hotplug: Non-SMP machines do not make use of booted_once

Following commit breaks the non-SMP builds.

[0cc3cd21657be04cb0] cpu/hotplug: Boot HT siblings at least once

Signed-off-by: Abel Vesa <abelvesa@...ux.com>
---
 kernel/cpu.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/kernel/cpu.c b/kernel/cpu.c
index 099fb20cd7be..f06c513c5c42 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -2272,6 +2272,8 @@ void __init boot_cpu_init(void)
  */
 void __init boot_cpu_hotplug_init(void)
 {
+#ifdef CONFIG_SMP
 	this_cpu_write(cpuhp_state.booted_once, true);
+#endif
 	this_cpu_write(cpuhp_state.state, CPUHP_ONLINE);
 }
-- 
2.18.0