net/mlx4_core: Fix struct mlx4_vhcr_cmd to make implicit padding explicit
Struct mlx4_vhcr was implicitly padded by the gcc compiler on 64-bit architectures. This commit makes that padding explicit, to prevent issues with changing compilers and with incompatibilities between 32-bit architecture implicit padding and 64-bit architecture implicit padding. This structure is used in virtualization for communication between the Host and its Guests. The explicit padding allows 64-bit Hosts (old and new) to continue to interoperate with 64-bit Guests (old and new). However, without this fix, 64-bit Hosts could not interoperate with 32-bit Guests (since these did not insert the padding dword). With this fix, 32-bit Guests will be able to interoperate with 64-bit Hosts (since the structure offsets will be identical on both). Reported-by:Alexander Schmidt <alexs@linux.vnet.ibm.com> Signed-off-by:
Jack Morgenstein <jackm@dev.mellanox.co.il> Signed-off-by:
Amir Vadai <amirv@mellanox.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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