From 70ae77f497a57b3ef6b0987b6310327264517cb0 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] x86-64: Use safe_apic_wait_icr_idle in __send_IPI_dest_field - x86_64 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 --- include/asm-x86_64/ipi.h | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/include/asm-x86_64/ipi.h b/include/asm-x86_64/ipi.h index 26961e6719..a7c75ea408 100644 --- a/include/asm-x86_64/ipi.h +++ b/include/asm-x86_64/ipi.h @@ -85,7 +85,10 @@ static inline void __send_IPI_dest_field(unsigned int mask, int vector, unsigned /* * 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 -- 2.39.5