From: Fernando Luis [** ISO-8859-1 charset **] VázquezCao Date: Wed, 2 May 2007 17:27:18 +0000 (+0200) Subject: [PATCH] x86-64: Use safe_apic_wait_icr_idle in __send_IPI_dest_field - x86_64 X-Git-Tag: v2.6.22-rc1~1011^2~49 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=70ae77f497a57b3ef6b0987b6310327264517cb0;p=linux-2.6 [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 --- 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