libnvdimm, pmem: use ->queuedata for driver private data

Save a pointer chase by storing the driver private data in the
request_queue rather than the gendisk.

Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c
index 6fa39f5..2238e3a 100644 (file)
--- a/drivers/nvdimm/pmem.c
+++ b/drivers/nvdimm/pmem.c
@@ -135,8 +135,7 @@ static blk_qc_t pmem_make_request(struct request_queue *q, struct bio *bio)
        unsigned long start;
        struct bio_vec bvec;
        struct bvec_iter iter;
-       struct block_device *bdev = bio->bi_bdev;
-       struct pmem_device *pmem = bdev->bd_disk->private_data;
+       struct pmem_device *pmem = q->queuedata;
 
        do_acct = nd_iostat_start(bio, &start);
        bio_for_each_segment(bvec, bio, iter) {
@@ -161,7 +160,7 @@ static blk_qc_t pmem_make_request(struct request_queue *q, struct bio *bio)
 static int pmem_rw_page(struct block_device *bdev, sector_t sector,
                       struct page *page, int rw)
 {
-       struct pmem_device *pmem = bdev->bd_disk->private_data;
+       struct pmem_device *pmem = bdev->bd_queue->queuedata;
        int rc;
 
        rc = pmem_do_bvec(pmem, page, PAGE_SIZE, 0, rw, sector);
@@ -183,7 +182,7 @@ static int pmem_rw_page(struct block_device *bdev, sector_t sector,
 static long pmem_direct_access(struct block_device *bdev, sector_t sector,
                      void __pmem **kaddr, pfn_t *pfn)
 {
-       struct pmem_device *pmem = bdev->bd_disk->private_data;
+       struct pmem_device *pmem = bdev->bd_queue->queuedata;
        resource_size_t offset = sector * 512 + pmem->data_offset;
 
        *kaddr = pmem->virt_addr + offset;
@@ -267,6 +266,7 @@ static int pmem_attach_disk(struct device *dev,
        blk_queue_max_hw_sectors(pmem->pmem_queue, UINT_MAX);
        blk_queue_bounce_limit(pmem->pmem_queue, BLK_BOUNCE_ANY);
        queue_flag_set_unlocked(QUEUE_FLAG_NONROT, pmem->pmem_queue);
+       pmem->pmem_queue->queuedata = pmem;
 
        disk = alloc_disk_node(0, nid);
        if (!disk) {
@@ -275,7 +275,6 @@ static int pmem_attach_disk(struct device *dev,
        }
 
        disk->fops              = &pmem_fops;
-       disk->private_data      = pmem;
        disk->queue             = pmem->pmem_queue;
        disk->flags             = GENHD_FL_EXT_DEVT;
        nvdimm_namespace_disk_name(ndns, disk->disk_name);