[Xen-changelog] [xen-unstable] [XEN] Fix kexec crash.

[Xen patchbot-unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User kfraser@xxxxxxxxxxxxxxxxxxxxx
# Node ID 2fa06640a1c116c36936d22ae0c7b121680e6c3b
# Parent  05e1863cc2a3ca4c4a1a68a529435e4c3ad127b9
[XEN] Fix kexec crash.
Signed-off-by: Keir Fraser <keir@xxxxxxxxxxxxx>
---
 xen/arch/x86/crash.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff -r 05e1863cc2a3 -r 2fa06640a1c1 xen/arch/x86/crash.c
--- a/xen/arch/x86/crash.c      Tue Dec 12 19:37:21 2006 +0000
+++ b/xen/arch/x86/crash.c      Wed Dec 13 09:46:48 2006 +0000
@@ -58,9 +58,9 @@ static void smp_send_nmi_allbutself(void
 static void smp_send_nmi_allbutself(void)
 {
     cpumask_t allbutself = cpu_online_map;
-
     cpu_clear(smp_processor_id(), allbutself);
-    send_IPI_mask(allbutself, APIC_DM_NMI);
+    if ( !cpus_empty(allbutself) )
+        send_IPI_mask(allbutself, APIC_DM_NMI);
 }
 
 static void nmi_shootdown_cpus(void)

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