From: Fernando Luis [** ISO-8859-1 charset **] VázquezCao <[email protected]>
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 <[email protected]>
Signed-off-by: Andi Kleen <[email protected]>
---
---
include/asm-x86_64/ipi.h | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
Index: linux/include/asm-x86_64/ipi.h
===================================================================
--- linux.orig/include/asm-x86_64/ipi.h
+++ linux/include/asm-x86_64/ipi.h
@@ -85,7 +85,10 @@ 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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