From: Thomas Gleixner <tglx@linutronix.de>
Date: Mon, 22 Jul 2019 20:47:06 +0200
Subject: x86/kgbd: Use NMI_VECTOR not APIC_DM_NMI
Git-commit: 2591bc4e8d70b4e1330d327fb7e3921f4e070a51
Patch-mainline: v5.4-rc1
References: bsc#1114279

apic->send_IPI_allbutself() takes a vector number as argument.

APIC_DM_NMI is clearly not a vector number. It's defined to 0x400 which is
outside the vector space.

Use NMI_VECTOR instead as that's what it is intended to be.

Fixes: 82da3ff89dc2 ("x86: kgdb support")
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20190722105218.855189979@linutronix.de

Acked-by: Borislav Petkov <bp@suse.de>
---
 arch/x86/kernel/kgdb.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/x86/kernel/kgdb.c
+++ b/arch/x86/kernel/kgdb.c
@@ -438,7 +438,7 @@ static void kgdb_disable_hw_debug(struct
  */
 void kgdb_roundup_cpus(unsigned long flags)
 {
-	apic->send_IPI_allbutself(APIC_DM_NMI);
+	apic->send_IPI_allbutself(NMI_VECTOR);
 }
 #endif