[PATCH v5 02/16] xen: Remove __{BIG,LITTLE}_ENDIAN_BITFIELD

[Andrew Cooper]

There is a singular user.  It's unlikely we'll gain a big-endian build of Xen,
but it's far more unlikely that bitfields will differ from main endianness.

Signed-off-by: Andrew Cooper <andrew.coop...@citrix.com>
---
CC: Anthony PERARD <anthony.per...@vates.tech>
CC: Michal Orzel <michal.or...@amd.com>
CC: Jan Beulich <jbeul...@suse.com>
CC: Julien Grall <jul...@xen.org>
CC: Roger Pau Monné <roger....@citrix.com>
CC: Stefano Stabellini <sstabell...@kernel.org>
CC: Volodymyr Babchuk <volodymyr_babc...@epam.com>
CC: Bertrand Marquis <bertrand.marq...@arm.com>
CC: Shawn Anastasio <sanasta...@raptorengineering.com>
CC: Oleksii Kurochko <oleksii.kuroc...@gmail.com>
CC: Daniel P. Smith <dpsm...@apertussolutions.com>
CC: Lin Liu <lin....@citrix.com>

I'm tempted to simply drop the logic in maptrack_node.  If any big-endian
build of Xen came along, that's probably the least of it's worries.

v5:
 * New.
---
 xen/common/grant_table.c                  | 4 ++--
 xen/include/xen/byteorder/big_endian.h    | 3 ---
 xen/include/xen/byteorder/little_endian.h | 3 ---
 3 files changed, 2 insertions(+), 8 deletions(-)

diff --git a/xen/common/grant_table.c b/xen/common/grant_table.c
index 6c77867f8cdd..d6886ee74847 100644
--- a/xen/common/grant_table.c
+++ b/xen/common/grant_table.c
@@ -979,12 +979,12 @@ static struct active_grant_entry *grant_map_exists(const 
struct domain *ld,
 union maptrack_node {
     struct {
         /* Radix tree slot pointers use two of the bits. */
-#ifdef __BIG_ENDIAN_BITFIELD
+#ifdef __BIG_ENDIAN
         unsigned long _0 : 2;
 #endif
         unsigned long rd : BITS_PER_LONG / 2 - 1;
         unsigned long wr : BITS_PER_LONG / 2 - 1;
-#ifndef __BIG_ENDIAN_BITFIELD
+#ifndef __BIG_ENDIAN
         unsigned long _0 : 2;
 #endif
     } cnt;
diff --git a/xen/include/xen/byteorder/big_endian.h 
b/xen/include/xen/byteorder/big_endian.h
index ce395a17f64b..9cfb567d51d5 100644
--- a/xen/include/xen/byteorder/big_endian.h
+++ b/xen/include/xen/byteorder/big_endian.h
@@ -4,9 +4,6 @@
 #ifndef __BIG_ENDIAN
 #define __BIG_ENDIAN 4321
 #endif
-#ifndef __BIG_ENDIAN_BITFIELD
-#define __BIG_ENDIAN_BITFIELD
-#endif
 
 #include <xen/types.h>
 #include <xen/byteorder/swab.h>
diff --git a/xen/include/xen/byteorder/little_endian.h 
b/xen/include/xen/byteorder/little_endian.h
index 8b118afba5e3..96c80eab2b12 100644
--- a/xen/include/xen/byteorder/little_endian.h
+++ b/xen/include/xen/byteorder/little_endian.h
@@ -4,9 +4,6 @@
 #ifndef __LITTLE_ENDIAN
 #define __LITTLE_ENDIAN 1234
 #endif
-#ifndef __LITTLE_ENDIAN_BITFIELD
-#define __LITTLE_ENDIAN_BITFIELD
-#endif
 
 #include <xen/types.h>
 #include <xen/byteorder/swab.h>
-- 
2.39.5