dax: introduce dax_direct_access()

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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: Dan Williams <dan.j.williams@intel.com>

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Dan Williams 2017-01-26 20:37:35 -08:00

parent d8f07aee3f

commit b0686260fe

5 changed files with 57 additions and 0 deletions

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1

include/linux/blkdev.h

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2

include/linux/dax.h

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