[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 <fernando@oss.ntt.co.jp>
Signed-off-by: Andi Kleen <ak@suse.de>

diff --git a/arch/i386/kernel/smp.c b/arch/i386/kernel/smp.c
index d14ffe2109b8fed558ac29b6dd7c3f932f29e78f..f8667109db1c6b5deaa9afd21973ebcf099e30d3 100644 (file)
--- 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