From: Fernando Luis [** ISO-8859-1 charset **] VázquezCao Date: Wed, 2 May 2007 17:27:18 +0000 (+0200) Subject: [PATCH] i386: Use safe_apic_wait_icr_idle in safe_apic_wait_icr_idle - i386 X-Git-Tag: v2.6.22-rc1~1011^2~50 X-Git-Url: http://www.pilppa.org/gitweb/gitweb.cgi?a=commitdiff_plain;h=f5efb41e793ce587836b89b7191083b9a6185ed5;p=linux-2.6-omap-h63xx.git [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 --- diff --git a/arch/i386/kernel/smp.c b/arch/i386/kernel/smp.c index d14ffe2109b..f8667109db1 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