linux-imx

int nd_label_reserve_dpa(struct nvdimm_drvdata *ndd)

{

    struct nd_namespace_index *nsindex;

    unsigned long *free;

    u32 nslot, slot;

​

    if (!preamble_current(ndd, &nsindex, &free, &nslot))

        return 0; /* no label, nothing to reserve */

​

    for_each_clear_bit_le(slot, free, nslot) {

        struct nd_namespace_label *nd_label;

        struct nd_region *nd_region = NULL;

        u8 label_uuid[NSLABEL_UUID_LEN];

        struct nd_label_id label_id;

        struct resource *res;

        u32 flags;

​

        nd_label = to_label(ndd, slot);

​

        if (!slot_valid(ndd, nd_label, slot))

            continue;

​

        memcpy(label_uuid, nd_label->uuid, NSLABEL_UUID_LEN);

        flags = __le32_to_cpu(nd_label->flags);

        nd_label_gen_id(&label_id, label_uuid, flags);

        res = nvdimm_allocate_dpa(ndd, &label_id,

                __le64_to_cpu(nd_label->dpa),

                __le64_to_cpu(nd_label->rawsize));

        nd_dbg_dpa(nd_region, ndd, res, "reserve\n");

        if (!res)

            return -EBUSY;

    }

​

    return 0;