[PATCH v9 24/30] examples/vhost_blk: replace packed attributes

[Andre Muezerie]

MSVC struct packing is not compatible with GCC. Replace macro
__rte_packed with __rte_packed_begin to push existing pack value
and set packing to 1-byte and macro __rte_packed_end to restore
the pack value prior to the push.

Macro __rte_packed_end is deliberately utilized to trigger a
MSVC compiler warning if no existing packing has been pushed allowing
easy identification of locations where the __rte_packed_begin is
missing.

Signed-off-by: Andre Muezerie <andremue at linux.microsoft.com>
---
 examples/vhost_blk/blk_spec.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/examples/vhost_blk/blk_spec.h b/examples/vhost_blk/blk_spec.h
index 3c54f70eaf..7f785fa563 100644
--- a/examples/vhost_blk/blk_spec.h
+++ b/examples/vhost_blk/blk_spec.h
@@ -73,7 +73,7 @@ struct vhost_memory_padded {
 	struct vhost_memory_region regions[VHOST_USER_MEMORY_MAX_NREGIONS];
 };
 
-struct vhost_user_msg {
+struct __rte_packed_begin vhost_user_msg {
 	enum vhost_user_request request;
 
 #define VHOST_USER_VERSION_MASK     0x3
@@ -89,6 +89,6 @@ struct vhost_user_msg {
 		struct vhost_memory_padded memory;
 		struct vhost_user_config cfg;
 	} payload;
-} __rte_packed;
+} __rte_packed_end;
 
 #endif
-- 
2.47.0.vfs.0.3