compat_flock
static int get_compat_flock(struct flock *kfl, const struct compat_flock __user *ufl)
struct compat_flock fl;
if (copy_from_user(&fl, ufl, sizeof(struct compat_flock)))
static int put_compat_flock(const struct flock *kfl, struct compat_flock __user *ufl)
struct compat_flock fl;
memset(&fl, 0, sizeof(struct compat_flock));
if (copy_to_user(ufl, &fl, sizeof(struct compat_flock)))