On Wed, Jun 26, 2019 at 02:27:15PM +0200, Christoph Hellwig wrote:
> The functionality is identical to the one currently open coded in
> device-dax.
>
> Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Reviewed-by: Ira Weiny <ira.weiny@xxxxxxxxx>
> ---
> drivers/dax/dax-private.h | 4 ----
> drivers/dax/device.c | 43 ---------------------------------------
> 2 files changed, 47 deletions(-)
>
> diff --git a/drivers/dax/dax-private.h b/drivers/dax/dax-private.h
> index b4177aafbbd1..c915889d1769 100644
> --- a/drivers/dax/dax-private.h
> +++ b/drivers/dax/dax-private.h
> @@ -43,8 +43,6 @@ struct dax_region {
> * @target_node: effective numa node if dev_dax memory range is onlined
> * @dev - device core
> * @pgmap - pgmap for memmap setup / lifetime (driver owned)
> - * @ref: pgmap reference count (driver owned)
> - * @cmp: @ref final put completion (driver owned)
> */
> struct dev_dax {
> struct dax_region *region;
> @@ -52,8 +50,6 @@ struct dev_dax {
> int target_node;
> struct device dev;
> struct dev_pagemap pgmap;
> - struct percpu_ref ref;
> - struct completion cmp;
> };
>
> static inline struct dev_dax *to_dev_dax(struct device *dev)
> diff --git a/drivers/dax/device.c b/drivers/dax/device.c
> index b5257038c188..1af823b2fe6b 100644
> --- a/drivers/dax/device.c
> +++ b/drivers/dax/device.c
> @@ -14,36 +14,6 @@
> #include "dax-private.h"
> #include "bus.h"
>
> -static struct dev_dax *ref_to_dev_dax(struct percpu_ref *ref)
> -{
> - return container_of(ref, struct dev_dax, ref);
> -}
> -
> -static void dev_dax_percpu_release(struct percpu_ref *ref)
> -{
> - struct dev_dax *dev_dax = ref_to_dev_dax(ref);
> -
> - dev_dbg(&dev_dax->dev, "%s\n", __func__);
> - complete(&dev_dax->cmp);
> -}
> -
> -static void dev_dax_percpu_exit(struct dev_pagemap *pgmap)
> -{
> - struct dev_dax *dev_dax = container_of(pgmap, struct dev_dax, pgmap);
> -
> - dev_dbg(&dev_dax->dev, "%s\n", __func__);
> - wait_for_completion(&dev_dax->cmp);
> - percpu_ref_exit(pgmap->ref);
> -}
> -
> -static void dev_dax_percpu_kill(struct dev_pagemap *pgmap)
> -{
> - struct dev_dax *dev_dax = container_of(pgmap, struct dev_dax, pgmap);
> -
> - dev_dbg(&dev_dax->dev, "%s\n", __func__);
> - percpu_ref_kill(pgmap->ref);
> -}
> -
> static int check_vma(struct dev_dax *dev_dax, struct vm_area_struct *vma,
> const char *func)
> {
> @@ -441,11 +411,6 @@ static void dev_dax_kill(void *dev_dax)
> kill_dev_dax(dev_dax);
> }
>
> -static const struct dev_pagemap_ops dev_dax_pagemap_ops = {
> - .kill = dev_dax_percpu_kill,
> - .cleanup = dev_dax_percpu_exit,
> -};
> -
> int dev_dax_probe(struct device *dev)
> {
> struct dev_dax *dev_dax = to_dev_dax(dev);
> @@ -463,15 +428,7 @@ int dev_dax_probe(struct device *dev)
> return -EBUSY;
> }
>
> - init_completion(&dev_dax->cmp);
> - rc = percpu_ref_init(&dev_dax->ref, dev_dax_percpu_release, 0,
> - GFP_KERNEL);
> - if (rc)
> - return rc;
> -
> - dev_dax->pgmap.ref = &dev_dax->ref;
> dev_dax->pgmap.type = MEMORY_DEVICE_DEVDAX;
> - dev_dax->pgmap.ops = &dev_dax_pagemap_ops;
> addr = devm_memremap_pages(dev, &dev_dax->pgmap);
> if (IS_ERR(addr))
> return PTR_ERR(addr);
> --
> 2.20.1
>
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