[XEN PATCH 09/13] xen/public: fixed violations of MISRA C:2012 Rule 7.2

[Simone Ballarin <simone.ballarin@xxxxxxxxxxx>]

From: Gianluca Luparini <gianluca.luparini@xxxxxxxxxxx>

The xen sources contains violations of MISRA C:2012 Rule 7.2 whose headline 
states:
"A "u" or "U" suffix shall be applied to all integer constants that are 
represented in an unsigned type".

I propose to use "U" as a suffix to explicitly state when an integer constant 
is represented in an unsigned type.
For homogeneity, I also added the "U" suffix in some cases that the tool didn't 
report as violations.

Signed-off-by: Simone Ballarin <simone.ballarin@xxxxxxxxxxx>
---
 xen/include/public/io/ring.h | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/xen/include/public/io/ring.h b/xen/include/public/io/ring.h
index 025939278b..6a6deeee8f 100644
--- a/xen/include/public/io/ring.h
+++ b/xen/include/public/io/ring.h
@@ -36,11 +36,11 @@
 typedef unsigned int RING_IDX;
 
 /* Round a 32-bit unsigned constant down to the nearest power of two. */
-#define __RD2(_x)  (((_x) & 0x00000002) ? 0x2                  : ((_x) & 0x1))
-#define __RD4(_x)  (((_x) & 0x0000000c) ? __RD2((_x)>>2)<<2    : __RD2(_x))
-#define __RD8(_x)  (((_x) & 0x000000f0) ? __RD4((_x)>>4)<<4    : __RD4(_x))
-#define __RD16(_x) (((_x) & 0x0000ff00) ? __RD8((_x)>>8)<<8    : __RD8(_x))
-#define __RD32(_x) (((_x) & 0xffff0000) ? __RD16((_x)>>16)<<16 : __RD16(_x))
+#define __RD2(_x)  (((_x) & 0x00000002U) ? 0x2                  : ((_x) & 0x1))
+#define __RD4(_x)  (((_x) & 0x0000000cU) ? __RD2((_x)>>2)<<2    : __RD2(_x))
+#define __RD8(_x)  (((_x) & 0x000000f0U) ? __RD4((_x)>>4)<<4    : __RD4(_x))
+#define __RD16(_x) (((_x) & 0x0000ff00U) ? __RD8((_x)>>8)<<8    : __RD8(_x))
+#define __RD32(_x) (((_x) & 0xffff0000U) ? __RD16((_x)>>16)<<16 : __RD16(_x))
 
 /*
  * Calculate size of a shared ring, given the total available space for the
-- 
2.41.0