From f5efb41e793ce587836b89b7191083b9a6185ed5 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Fernando=20Luis=20=5B**=20ISO-8859-1=20charset=20**=5D=20V?= =?utf8?q?=E1zquezCao?= Date: Wed, 2 May 2007 19:27:18 +0200 Subject: [PATCH] [PATCH] i386: Use safe_apic_wait_icr_idle in safe_apic_wait_icr_idle - i386 Use safe_apic_wait_icr_idle to check ICR idle bit if the vector is NMI_VECTOR to avoid potential hangups in the event of crash when kdump tries to stop the other CPUs. Signed-off-by: Fernando Luis Vazquez Cao Signed-off-by: Andi Kleen --- arch/i386/kernel/smp.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/arch/i386/kernel/smp.c b/arch/i386/kernel/smp.c index d14ffe2109b8..f8667109db1c 100644 --- a/arch/i386/kernel/smp.c +++ b/arch/i386/kernel/smp.c @@ -175,7 +175,10 @@ static inline void __send_IPI_dest_field(unsigned long mask, int vector) /* * Wait for idle. */ - apic_wait_icr_idle(); + if (unlikely(vector == NMI_VECTOR)) + safe_apic_wait_icr_idle(); + else + apic_wait_icr_idle(); /* * prepare target chip field -- 2.30.2