dax: introduce dax_direct_access()
authorDan Williams <dan.j.williams@intel.com>
Fri, 27 Jan 2017 04:37:35 +0000 (20:37 -0800)
committerDan Williams <dan.j.williams@intel.com>
Thu, 20 Apr 2017 18:57:52 +0000 (11:57 -0700)
commitb0686260fecaa924d8eff2ace94bee70506bc308
tree36193b32e9f64ee93c4dd02e29da9256e8930fb7
parentd8f07aee3f2fd959878bf614d4e984900018eb9e
dax: introduce dax_direct_access()

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>
block/Kconfig
drivers/dax/super.c
fs/block_dev.c
include/linux/blkdev.h
include/linux/dax.h