[patch V3 15/25] x86/apic: Add NMI_VECTOR wait to IPI shorthand

[Thomas Gleixner]

To support NMI shorthand broadcasts add the safe wait for ICR idle for NMI
vector delivery.

Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
---
 arch/x86/kernel/apic/ipi.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

--- a/arch/x86/kernel/apic/ipi.c
+++ b/arch/x86/kernel/apic/ipi.c
@@ -30,7 +30,10 @@ void __default_send_IPI_shortcut(unsigne
 	/*
 	 * Wait for idle.
 	 */
-	__xapic_wait_icr_idle();
+	if (unlikely(vector == NMI_VECTOR))
+		safe_apic_wait_icr_idle();
+	else
+		__xapic_wait_icr_idle();
 
 	/*
 	 * No need to touch the target chip field. Also the destination