[U-Boot] [RFC PATCH 02/12] linux_compat: remove cpu_relax() define

[Masahiro Yamada]

The macro cpu_relax() is defined by several headers in different
ways.

arch/{arm,avr32,mips}/include/asm/processor.h defines it as follows:
  #define cpu_relax()	barrier()

On the other hand, include/linux/compat.h defines it as follows:
  #define cpu_relax() do {} while (0)

If both headers are included from the same source file, the warning
  warning: "cpu_relax" redefined [enabled by default]
is displayed.

It effectively makes it impossible to include <linux/compat.h>
from some sources.  Drop the latter.

Signed-off-by: Masahiro Yamada <yamada.masahiro at socionext.com>
---

 drivers/usb/musb-new/musb_gadget_ep0.c | 1 +
 include/linux/compat.h                 | 2 --
 2 files changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/usb/musb-new/musb_gadget_ep0.c b/drivers/usb/musb-new/musb_gadget_ep0.c
index 5a71501..415a9f2 100644
--- a/drivers/usb/musb-new/musb_gadget_ep0.c
+++ b/drivers/usb/musb-new/musb_gadget_ep0.c
@@ -43,6 +43,7 @@
 #else
 #include <common.h>
 #include "linux-compat.h"
+#include <asm/processor.h>
 #endif
 
 #include "musb_core.h"
diff --git a/include/linux/compat.h b/include/linux/compat.h
index 6ff3915..da1420f 100644
--- a/include/linux/compat.h
+++ b/include/linux/compat.h
@@ -315,8 +315,6 @@ struct notifier_block {};
 
 typedef unsigned long dmaaddr_t;
 
-#define cpu_relax() do {} while (0)
-
 #define pm_runtime_get_sync(dev) do {} while (0)
 #define pm_runtime_put(dev) do {} while (0)
 #define pm_runtime_put_sync(dev) do {} while (0)
-- 
1.9.1