[PATCH 6/7] dax: re-enable DAX PMD support

DAX PMDs have been disabled since Jan Kara introduced DAX radix tree based locking. This patch allows DAX PMDs to participate in the DAX radix tree based locking scheme so that they can be re-enabled. There are currently three types of DAX 4k entries: 4k zero pages, 4k DAX mappings that have an

[PATCH 6/7] dax: re-enable DAX PMD support

DAX PMDs have been disabled since Jan Kara introduced DAX radix tree based locking. This patch allows DAX PMDs to participate in the DAX radix tree based locking scheme so that they can be re-enabled. There are currently three types of DAX 4k entries: 4k zero pages, 4k DAX mappings that have an