No need to use use continuous memory, it may be fail
when memory deeply fragmented.
Signed-off-by: NChen Feng <puck.chen@hisilicon.com>
Signed-off-by: NXia Qing <saberlily.xia@hisilicon.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>