[PATCH -mm] IOAT: fix for UP use of cpu_physical_id()

[Shannon Nelson]

Make sure we can use cpu_physical_id() even when compiled for
uni-processor.

Cc: "Luck, Tony" <tony.luck@xxxxxxxxx>
Cc: Andi Kleen <ak@xxxxxxx>
Cc: Chris Leech <chris.leech@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Shannon Nelson <shannon.nelson@xxxxxxxxx>
---

 drivers/dma/ioat_dca.c |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)

diff --git a/drivers/dma/ioat_dca.c b/drivers/dma/ioat_dca.c
index c3a500b..b1af49c 100644
--- a/drivers/dma/ioat_dca.c
+++ b/drivers/dma/ioat_dca.c
@@ -25,6 +25,14 @@
 #include <linux/smp.h>
 #include <linux/interrupt.h>
 #include <linux/dca.h>
+
+// either a kernel change is needed, or we need something like this in kernel
+#ifndef CONFIG_SMP
+#include <asm/smp.h>
+#undef cpu_physical_id
+#define cpu_physical_id(cpu) (cpuid_ebx(1) >> 24)
+#endif
+
 #include "ioatdma.h"
 #include "ioatdma_registers.h"
 
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