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The function guarantees type checking of arguments and return value. Result of rtw_netdev_priv macro can be assigned to pointer with incompatible type without warning. The function allow compiler to perform this check. Signed-off-by: Ivan Safonov <insafonov@gmail.com> Link: https://lore.kernel.org/r/20200801180235.34116-1-insafonov@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>