• Dan Williams's avatar
    dax: introduce dax_direct_access() · b0686260
    Dan Williams authored
    Replace bdev_direct_access() with dax_direct_access() that uses
    dax_device and dax_operations instead of a block_device and
    block_device_operations for dax. Once all consumers of the old api have
    been converted bdev_direct_access() will be deleted.
    
    Given that block device partitioning decisions can cause dax page
    alignment constraints to be violated this also introduces the
    bdev_dax_pgoff() helper. It handles calculating a logical pgoff relative
    to the dax_device and also checks for page alignment.
    Signed-off-by: default avatarDan Williams <dan.j.williams@intel.com>
    b0686260
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