The swab() is massively over complicated
Simplify it with compiler builtins and fallback to plain C function
if undefined.
Update components to switch to this new swap bytes.

Lin Liu (6):
  xen: implement byteswap
  crypto/vmac: Simplify code with byteswap
  arm64/find_next_bit: Remove ext2_swab()
  xen: Switch to byteswap
  byteorder: Remove byteorder
  tools: Remove unnecessary header

 .../guest/xg_dom_decompress_unsafe_zstd.c     |   1 -
 xen/arch/arm/arm64/lib/find_next_bit.c        |  36 +---
 xen/arch/arm/include/asm/byteorder.h          |  14 +-
 xen/arch/x86/include/asm/byteorder.h          |  34 +---
 xen/common/device_tree.c                      |  44 ++---
 xen/common/libelf/libelf-private.h            |   6 +-
 xen/common/xz/private.h                       |   2 +-
 xen/crypto/vmac.c                             |  76 +-------
 xen/include/xen/byteorder.h                   |  56 ++++++
 xen/include/xen/byteorder/big_endian.h        | 102 ----------
 xen/include/xen/byteorder/generic.h           |  68 -------
 xen/include/xen/byteorder/little_endian.h     | 102 ----------
 xen/include/xen/byteorder/swab.h              | 183 ------------------
 xen/include/xen/byteswap.h                    |  44 +++++
 xen/include/xen/compiler.h                    |  12 ++
 xen/include/xen/unaligned.h                   |  24 +--
 16 files changed, 167 insertions(+), 637 deletions(-)
 create mode 100644 xen/include/xen/byteorder.h
 delete mode 100644 xen/include/xen/byteorder/big_endian.h
 delete mode 100644 xen/include/xen/byteorder/generic.h
 delete mode 100644 xen/include/xen/byteorder/little_endian.h
 delete mode 100644 xen/include/xen/byteorder/swab.h
 create mode 100644 xen/include/xen/byteswap.h

-- 
2.27.0