staging: lustre: obdclass: simplify class_uuid_unparse

This patch simplifies uuid unparse logic by using sprintf "%pU" extension.
And eliminates the code with a coding style error:

ERROR: Macros with complex values should be enclosed in parentheses
+#define CONSUME(val, ptr) (val) = consume(sizeof(val), (ptr))
Signed-off-by: Vasiliy Korchagin <vasiliy.korchagin@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/lustre/lustre/obdclass/uuid.c

@@ -43,40 +43,8 @@
 #include "../include/obd_support.h"
 #include "../include/obd_class.h"
 
-
-static inline __u32 consume(int nob, __u8 **ptr)
-{
-	__u32 value;
-
-	LASSERT(nob <= sizeof(value));
-
-	for (value = 0; nob > 0; --nob)
-		value = (value << 8) | *((*ptr)++);
-	return value;
-}
-
-#define CONSUME(val, ptr) (val) = consume(sizeof(val), (ptr))
-
-static void uuid_unpack(class_uuid_t in, __u16 *uu, int nr)
-{
-	__u8 *ptr = in;
-
-	LASSERT(nr * sizeof(*uu) == sizeof(class_uuid_t));
-
-	while (nr-- > 0)
-		CONSUME(uu[nr], &ptr);
-}
-
 void class_uuid_unparse(class_uuid_t uu, struct obd_uuid *out)
 {
-	/* uu as an array of __u16's */
-	__u16 uuid[sizeof(class_uuid_t) / sizeof(__u16)];
-
-	CLASSERT(ARRAY_SIZE(uuid) == 8);
-
-	uuid_unpack(uu, uuid, ARRAY_SIZE(uuid));
-	sprintf(out->uuid, "%04x%04x-%04x-%04x-%04x-%04x%04x%04x",
-		uuid[0], uuid[1], uuid[2], uuid[3],
-		uuid[4], uuid[5], uuid[6], uuid[7]);
+	sprintf(out->uuid, "%pU", uu);
 }
 EXPORT_SYMBOL(class_uuid_unparse);