summaryrefslogtreecommitdiff
path: root/fs/block_dev.c
diff options
context:
space:
mode:
authorDan Williams <dan.j.williams@intel.com>2017-01-28 04:22:03 +0300
committerDan Williams <dan.j.williams@intel.com>2017-04-25 23:20:46 +0300
commitd4b29fd78ea6fc2be219be3af1a992149b4ff0f6 (patch)
tree4020240085b9b61af2a27ebd454693e60f9ecd61 /fs/block_dev.c
parent2093f2e9dfec98e561c83e807910267bcbd8bb7b (diff)
downloadlinux-d4b29fd78ea6fc2be219be3af1a992149b4ff0f6.tar.xz
block: remove block_device_operations ->direct_access()
Now that all the producers and consumers of dax interfaces have been converted to using dax_operations on a dax_device, remove the block device direct_access enabling. Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'fs/block_dev.c')
-rw-r--r--fs/block_dev.c45
1 files changed, 0 insertions, 45 deletions
diff --git a/fs/block_dev.c b/fs/block_dev.c
index ecbdc8f9f718..10e21465d5a9 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -718,51 +718,6 @@ int bdev_write_page(struct block_device *bdev, sector_t sector,
}
EXPORT_SYMBOL_GPL(bdev_write_page);
-/**
- * bdev_direct_access() - Get the address for directly-accessibly memory
- * @bdev: The device containing the memory
- * @dax: control and output parameters for ->direct_access
- *
- * If a block device is made up of directly addressable memory, this function
- * will tell the caller the PFN and the address of the memory. The address
- * may be directly dereferenced within the kernel without the need to call
- * ioremap(), kmap() or similar. The PFN is suitable for inserting into
- * page tables.
- *
- * Return: negative errno if an error occurs, otherwise the number of bytes
- * accessible at this address.
- */
-long bdev_direct_access(struct block_device *bdev, struct blk_dax_ctl *dax)
-{
- sector_t sector = dax->sector;
- long avail, size = dax->size;
- const struct block_device_operations *ops = bdev->bd_disk->fops;
-
- /*
- * The device driver is allowed to sleep, in order to make the
- * memory directly accessible.
- */
- might_sleep();
-
- if (size < 0)
- return size;
- if (!blk_queue_dax(bdev_get_queue(bdev)) || !ops->direct_access)
- return -EOPNOTSUPP;
- if ((sector + DIV_ROUND_UP(size, 512)) >
- part_nr_sects_read(bdev->bd_part))
- return -ERANGE;
- sector += get_start_sect(bdev);
- if (sector % (PAGE_SIZE / 512))
- return -EINVAL;
- avail = ops->direct_access(bdev, sector, &dax->addr, &dax->pfn, size);
- if (!avail)
- return -ERANGE;
- if (avail > 0 && avail & ~PAGE_MASK)
- return -ENXIO;
- return min(avail, size);
-}
-EXPORT_SYMBOL_GPL(bdev_direct_access);
-
int bdev_dax_pgoff(struct block_device *bdev, sector_t sector, size_t size,
pgoff_t *pgoff)
{