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Subject[PATCH] [14/34] i386: Use safe_apic_wait_icr_idle in safe_apic_wait_icr_idle - i386
Date

From: Fernando Luis [** ISO-8859-1 charset **] VázquezCao <fernando@oss.ntt.co.jp>
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 <fernando@oss.ntt.co.jp>
Signed-off-by: Andi Kleen <ak@suse.de>

---
---
arch/i386/kernel/smp.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
Index: linux/arch/i386/kernel/smp.c
===================================================================
--- linux.orig/arch/i386/kernel/smp.c
+++ linux/arch/i386/kernel/smp.c
@@ -175,7 +175,10 @@ static inline void __send_IPI_dest_field
/*
* 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
-
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