path: root/tools/testing/nvdimm
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authorDan Williams <dan.j.williams@intel.com>2017-01-24 18:44:18 -0800
committerDan Williams <dan.j.williams@intel.com>2017-04-19 15:14:35 -0700
commit6568b08b77816cda2a95919c7494108d983d5941 (patch)
treecdc776afdf8dd6c583155d169017eb78ab94a8bf /tools/testing/nvdimm
parentdax: add a facility to lookup a dax device by 'host' device name (diff)
dax: introduce dax_operations
Track a set of dax_operations per dax_device that can be set at alloc_dax() time. These operations will be used to stop the abuse of block_device_operations for communicating dax capabilities to filesystems. It will also be used to replace the "pmem api" and move pmem-specific cache maintenance, and other dax-driver-specific filesystem-dax operations, to dax device methods. In particular this allows us to stop abusing __copy_user_nocache(), via memcpy_to_pmem(), with a driver specific replacement. This is a standalone introduction of the operations. Follow on patches convert each dax-driver and teach fs/dax.c to use ->direct_access() from dax_operations instead of block_device_operations. Suggested-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'tools/testing/nvdimm')
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