From: Igor Druzhinin <igor.druzhinin@citrix.com>
Date: Tue, 29 Oct 2019 13:35:45 +0000 (+0100)
Subject: x86/crash: fix kexec transition breakage
X-Git-Tag: archive/raspbian/4.11.3+24-g14b62ab3e5-1+rpi1^2~55^2~80
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=9eac9324c7f19d8fd0824a1ba25fd1ba7d60bab8;p=xen.git

x86/crash: fix kexec transition breakage

Following 6ff560f7f ("x86/SMP: don't try to stop already stopped CPUs")
an incorrect condition was placed into kexec transition path
leaving crashing CPU always online breaking kdump kernel entering.
Correct it by unifying the condition with smp_send_stop().

Signed-off-by: Igor Druzhinin <igor.druzhinin@citrix.com>
master commit: f56813f3470c5b4987963c3c41e4fe16b95c5a3f
master date: 2019-07-22 18:02:24 +0100
---

diff --git a/xen/arch/x86/crash.c b/xen/arch/x86/crash.c
index 4db0758a88..c9469ae2ed 100644
--- a/xen/arch/x86/crash.c
+++ b/xen/arch/x86/crash.c
@@ -179,7 +179,7 @@ static void nmi_shootdown_cpus(void)
      */
     iommu_crash_shutdown();
 
-    if ( num_online_cpus() > 1 )
+    if ( cpu_online(cpu) )
     {
         __stop_this_cpu();