From dc6416f1d711eb4c1726e845d653235dcaae12e1 Mon Sep 17 00:00:00 2001 From: Boris Ostrovsky Date: Thu, 17 Mar 2016 09:03:25 -0400 Subject: [PATCH] xen/x86: Call cpu_startup_entry(CPUHP_AP_ONLINE_IDLE) from xen_play_dead() This call has always been missing from xen_play dead() but until recently this was rather benign. With new cpu hotplug framework (commit 8df3e07e7f21 ("cpu/hotplug: Let upcoming cpu bring itself fully up"). however this call is required, otherwise a hot-plugged CPU will not be properly brough up (by never calling cpuhp_online_idle()) Signed-off-by: Boris Ostrovsky Signed-off-by: Konrad Rzeszutek Wilk --- arch/x86/xen/smp.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/x86/xen/smp.c b/arch/x86/xen/smp.c index 3c6d17fd423a..719cf291dcdf 100644 --- a/arch/x86/xen/smp.c +++ b/arch/x86/xen/smp.c @@ -545,6 +545,8 @@ static void xen_play_dead(void) /* used only with HOTPLUG_CPU */ * data back is to call: */ tick_nohz_idle_enter(); + + cpu_startup_entry(CPUHP_AP_ONLINE_IDLE); } #else /* !CONFIG_HOTPLUG_CPU */ -- 2.30.2