sizeof() when applied to a pointer typed expression gives the
size of the pointer, not that of the pointed data.
Signed-off-by: NWei Yongjun <yongjun_wei@trendmicro.com.cn>
Acked-by: scameron@beardog.cce.hp.com
Signed-off-by: NJens Axboe <axboe@kernel.dk>