[PATCH v4 1/2] memremap: rename MEMORY_DEVICE_DEVDAX to MEMORY_DEVICE_GENERIC

[Roger Pau Monne <roger.pau@xxxxxxxxxx>]

This is in preparation for the logic behind MEMORY_DEVICE_DEVDAX also
being used by non DAX devices.

No functional change intended.

Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
---
Cc: Dan Williams <dan.j.williams@xxxxxxxxx>
Cc: Vishal Verma <vishal.l.verma@xxxxxxxxx>
Cc: Dave Jiang <dave.jiang@xxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Jason Gunthorpe <jgg@xxxxxxxx>
Cc: Ira Weiny <ira.weiny@xxxxxxxxx>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@xxxxxxxxxxxxx>
Cc: Johannes Thumshirn <jthumshirn@xxxxxxx>
Cc: Logan Gunthorpe <logang@xxxxxxxxxxxx>
Cc: linux-nvdimm@xxxxxxxxxxxx
Cc: xen-devel@xxxxxxxxxxxxxxxxxxxx
Cc: linux-mm@xxxxxxxxx
---
 drivers/dax/device.c     | 2 +-
 include/linux/memremap.h | 9 ++++-----
 mm/memremap.c            | 2 +-
 3 files changed, 6 insertions(+), 7 deletions(-)

diff --git a/drivers/dax/device.c b/drivers/dax/device.c
index 4c0af2eb7e19..1e89513f3c59 100644
--- a/drivers/dax/device.c
+++ b/drivers/dax/device.c
@@ -429,7 +429,7 @@ int dev_dax_probe(struct device *dev)
                return -EBUSY;
        }
 
-       dev_dax->pgmap.type = MEMORY_DEVICE_DEVDAX;
+       dev_dax->pgmap.type = MEMORY_DEVICE_GENERIC;
        addr = devm_memremap_pages(dev, &dev_dax->pgmap);
        if (IS_ERR(addr))
                return PTR_ERR(addr);
diff --git a/include/linux/memremap.h b/include/linux/memremap.h
index 5f5b2df06e61..e5862746751b 100644
--- a/include/linux/memremap.h
+++ b/include/linux/memremap.h
@@ -46,11 +46,10 @@ struct vmem_altmap {
  * wakeup is used to coordinate physical address space management (ex:
  * fs truncate/hole punch) vs pinned pages (ex: device dma).
  *
- * MEMORY_DEVICE_DEVDAX:
+ * MEMORY_DEVICE_GENERIC:
  * Host memory that has similar access semantics as System RAM i.e. DMA
- * coherent and supports page pinning. In contrast to
- * MEMORY_DEVICE_FS_DAX, this memory is access via a device-dax
- * character device.
+ * coherent and supports page pinning. This is for example used by DAX devices
+ * that expose memory using a character device.
  *
  * MEMORY_DEVICE_PCI_P2PDMA:
  * Device memory residing in a PCI BAR intended for use with Peer-to-Peer
@@ -60,7 +59,7 @@ enum memory_type {
        /* 0 is reserved to catch uninitialized type fields */
        MEMORY_DEVICE_PRIVATE = 1,
        MEMORY_DEVICE_FS_DAX,
-       MEMORY_DEVICE_DEVDAX,
+       MEMORY_DEVICE_GENERIC,
        MEMORY_DEVICE_PCI_P2PDMA,
 };
 
diff --git a/mm/memremap.c b/mm/memremap.c
index 03e38b7a38f1..006dace60b1a 100644
--- a/mm/memremap.c
+++ b/mm/memremap.c
@@ -216,7 +216,7 @@ void *memremap_pages(struct dev_pagemap *pgmap, int nid)
                        return ERR_PTR(-EINVAL);
                }
                break;
-       case MEMORY_DEVICE_DEVDAX:
+       case MEMORY_DEVICE_GENERIC:
                need_devmap_managed = false;
                break;
        case MEMORY_DEVICE_PCI_P2PDMA:
-- 
2.28.0