LINUX_KQ_FLAG_NEED_WRITE
LINUX_KQ_FLAG_NEED_WRITE;
return ((filp->f_kqflags & LINUX_KQ_FLAG_NEED_WRITE) ? 1 : 0);
LINUX_KQ_FLAG_NEED_WRITE);
filp->f_kqflags |= LINUX_KQ_FLAG_NEED_WRITE;