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]>
---
diff -urNp linux-2.6.21-rc7-orig/include/asm-x86_64/ipi.h linux-2.6.21-rc7/include/asm-x86_64/ipi.h
--- linux-2.6.21-rc7-orig/include/asm-x86_64/ipi.h 2007-04-23 17:34:56.000000000 +0900
+++ linux-2.6.21-rc7/include/asm-x86_64/ipi.h 2007-04-25 19:15:01.000000000 +0900
@@ -87,7 +87,10 @@ 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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