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This patch uses int32_t to replace ints, to fix Rule 4.6 of the
MISRA standard.

Change-Id: I20ac6185929eced684b43da3ef1f8cd5fbddc83d
Signed-off-by: Anthony Zhou <anzhou@nvidia.com>
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>