aecdc70604
coverity scan CID:147448,type: unchecked return value coverity scan CID:147449,type: unchecked return value coverity scan CID:147450,type: unchecked return value coverity scan CID:147453,type: unchecked return value coverity scan CID:147454,type: unchecked return value Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: luozhengzheng <luo.zhengzheng@zte.com.cn> Closes #5206