[PATCH v9 17/30] drivers/vdpa: 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>
Reviewed-by: Tyler Retzlaff <roretzla at linux.microsoft.com>
---
 drivers/vdpa/ifc/base/ifcvf.h | 4 ++--
 drivers/vdpa/mlx5/mlx5_vdpa.h | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/vdpa/ifc/base/ifcvf.h b/drivers/vdpa/ifc/base/ifcvf.h
index 04c81c8196..0c3b8956c5 100644
--- a/drivers/vdpa/ifc/base/ifcvf.h
+++ b/drivers/vdpa/ifc/base/ifcvf.h
@@ -115,11 +115,11 @@ struct ifcvf_pci_common_cfg {
 	u32 queue_used_hi;
 };
 
-struct ifcvf_net_config {
+struct __rte_packed_begin ifcvf_net_config {
 	u8    mac[6];
 	u16   status;
 	u16   max_virtqueue_pairs;
-} __rte_packed;
+} __rte_packed_end;
 
 struct ifcvf_pci_mem_resource {
 	u64      phys_addr; /**< Physical address, 0 if not resource. */
diff --git a/drivers/vdpa/mlx5/mlx5_vdpa.h b/drivers/vdpa/mlx5/mlx5_vdpa.h
index e156520172..a398aa22ce 100644
--- a/drivers/vdpa/mlx5/mlx5_vdpa.h
+++ b/drivers/vdpa/mlx5/mlx5_vdpa.h
@@ -90,13 +90,13 @@ enum mlx5_vdpa_task_type {
 };
 
 /* Generic task information and size must be multiple of 4B. */
-struct __rte_aligned(4) mlx5_vdpa_task {
+struct __rte_aligned(4) __rte_packed_begin mlx5_vdpa_task {
 	struct mlx5_vdpa_priv *priv;
 	enum mlx5_vdpa_task_type type;
 	RTE_ATOMIC(uint32_t) *remaining_cnt;
 	RTE_ATOMIC(uint32_t) *err_cnt;
 	uint32_t idx;
-} __rte_packed;
+} __rte_packed_end;
 
 /* Generic mlx5_vdpa_c_thread information. */
 struct mlx5_vdpa_c_thread {
-- 
2.47.0.vfs.0.3