[PATCH v3] RFC deprecate RTE_MARKER in struct rte_mbuf

[Tyler Retzlaff]

Here is the latest iteration of the proposed change to allow struct rte_mbuf
to be consumed by MSVC.

* Introduce an internal __rte_marker macro conditionally expanded for MSVC
  vs existing users of the struct. At some point we can uncomment __rte_deprecated
  to assist migration away from the current marker fields for applications
  after appropriate announcement periods etc..

* Introduce anonymous unions to allow aliasing of the previous named
  offsets by a *new* name.  The intention would be to convert the dpdk tree
  to use the new names along with this change and enable __rte_deprecated
  for dpdk builds (not applications) to avoid accidental re-introduction.

* The anonymous unions are now also used to pad cacheline0 and cacheline1 instead
  of __rte_cache_min_aligned.

* Converted the type of the fields for the named markers to char[] instead of
  uint8_t[].

Tyler Retzlaff (1):
  mbuf: deprecate GCC marker in rte mbuf struct

 lib/eal/include/rte_common.h |   6 +
 lib/mbuf/rte_mbuf_core.h     | 365 +++++++++++++++++++++++--------------------
 2 files changed, 201 insertions(+), 170 deletions(-)

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1.8.3.1