int llu_extent_lock(struct ll_file_data *fd, struct inode *inode,
struct lov_stripe_md *lsm, int mode,
ldlm_policy_data_t *policy, struct lustre_handle *lockh,
int llu_extent_lock(struct ll_file_data *fd, struct inode *inode,
struct lov_stripe_md *lsm, int mode,
ldlm_policy_data_t *policy, struct lustre_handle *lockh,