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path: root/drivers/usb/mon/mon_dma.c
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Diffstat (limited to 'drivers/usb/mon/mon_dma.c')
-rw-r--r--drivers/usb/mon/mon_dma.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/usb/mon/mon_dma.c b/drivers/usb/mon/mon_dma.c
index 0a1367b760a..ddcfc01e77a 100644
--- a/drivers/usb/mon/mon_dma.c
+++ b/drivers/usb/mon/mon_dma.c
@@ -13,7 +13,10 @@
#include <linux/usb.h> /* Only needed for declarations in usb_mon.h */
#include "usb_mon.h"
-#ifdef __i386__ /* CONFIG_ARCH_I386 does not exit */
+/*
+ * PC-compatibles, are, fortunately, sufficiently cache-coherent for this.
+ */
+#if defined(__i386__) || defined(__x86_64__) /* CONFIG_ARCH_I386 doesn't exit */
#define MON_HAS_UNMAP 1
#define phys_to_page(phys) pfn_to_page((phys) >> PAGE_SHIFT)