linux-kernel - cleanup vmap usage in the dma-mapping layer

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Message-Id: <20190604065504.25662-1-hch@lst.de>
Date:   Tue,  4 Jun 2019 08:55:01 +0200
From:   Christoph Hellwig <hch@....de>
To:     iommu@...ts.linux-foundation.org
Cc:     Russell King <linux@...linux.org.uk>,
        Robin Murphy <robin.murphy@....com>,
        linux-arm-kernel@...ts.infradead.org,
        linux-xtensa@...ux-xtensa.org, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: cleanup vmap usage in the dma-mapping layer

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.