Dont use shortcut when using send_IPI_all in flat mode

[Ashok Raj]

Hi

This got missed during the previous update for not doing shortcut 
since it introduces race in IPI, when using flat mode.

The earlier patches addressed send_IPI_allbutself, this one
take care of the sendall() case as well.

Andrew: Please consider for -mm

-- 
Cheers,
Ashok Raj
- Open Source Technology Center



Signed-off-by: Ashok Raj <ashok.raj@xxxxxxxxx>
--------------------------------------------------------
 arch/x86_64/kernel/genapic_flat.c |    4 ++++
 1 files changed, 4 insertions(+)

Index: linux-2.6.14-rc1-mm1/arch/x86_64/kernel/genapic_flat.c
===================================================================
--- linux-2.6.14-rc1-mm1.orig/arch/x86_64/kernel/genapic_flat.c
+++ linux-2.6.14-rc1-mm1/arch/x86_64/kernel/genapic_flat.c
@@ -94,7 +94,11 @@ static void flat_send_IPI_allbutself(int
 
 static void flat_send_IPI_all(int vector)
 {
+#ifndef CONFIG_HOTPLUG_CPU
 	__send_IPI_shortcut(APIC_DEST_ALLINC, vector, APIC_DEST_LOGICAL);
+#else
+	flat_send_IPI_mask(cpu_online_map, vector);
+#endif
 }
 
 static int flat_apic_id_registered(void)
-
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