Subject: cleanup vmap usage in the dma-mapping layer

From: Christoph Hellwig <[email-masked]>
Date: Tue, 4 Jun 2019 08:55:01 +0200

Hi all,

the common DMA remapping code uses the vmalloc/vmap code to create
page table entries for DMA mappings.  This series lifts the currently
arm specific VM_* flag for that into common code, and also exposes
it to userspace in procfs to better understand the mappings, and cleans
up a couple helpers in this area.

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