linux-kernel - Re: dax: Get rid of fs_dax_get_by

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Date:   Thu, 16 Jan 2020 09:54:03 -0500
From:   Vivek Goyal <vgoyal@...hat.com>
To:     dan.j.williams@...el.com
Cc:     linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-nvdimm@...ts.01.org
Subject: Re: dax: Get rid of fs_dax_get_by_host() helper

On Mon, Jan 06, 2020 at 01:11:17PM -0500, Vivek Goyal wrote:
> Looks like nobody is using fs_dax_get_by_host() except fs_dax_get_by_bdev()
> and it can easily use dax_get_by_host() instead.
> 
> IIUC, fs_dax_get_by_host() was only introduced so that one could compile
> with CONFIG_FS_DAX=n and CONFIG_DAX=m. fs_dax_get_by_bdev() achieves
> the same purpose and hence it looks like fs_dax_get_by_host() is not
> needed anymore.
>  
> Signed-off-by: Vivek Goyal <vgoyal@...hat.com>

Hi Dan,

Ping for this patch. How does it look to you. If you don't have concerns,
can you please take it in your tree.

Thanks
Vivek

> ---
>  drivers/dax/super.c |    2 +-
>  include/linux/dax.h |   10 ----------
>  2 files changed, 1 insertion(+), 11 deletions(-)
> 
> Index: rhvgoyal-linux-fuse/drivers/dax/super.c
> ===================================================================
> --- rhvgoyal-linux-fuse.orig/drivers/dax/super.c	2020-01-03 11:19:57.616186062 -0500
> +++ rhvgoyal-linux-fuse/drivers/dax/super.c	2020-01-03 11:20:08.941186062 -0500
> @@ -61,7 +61,7 @@ struct dax_device *fs_dax_get_by_bdev(st
>  {
>  	if (!blk_queue_dax(bdev->bd_queue))
>  		return NULL;
> -	return fs_dax_get_by_host(bdev->bd_disk->disk_name);
> +	return dax_get_by_host(bdev->bd_disk->disk_name);
>  }
>  EXPORT_SYMBOL_GPL(fs_dax_get_by_bdev);
>  #endif
> Index: rhvgoyal-linux-fuse/include/linux/dax.h
> ===================================================================
> --- rhvgoyal-linux-fuse.orig/include/linux/dax.h	2020-01-03 11:20:05.603186062 -0500
> +++ rhvgoyal-linux-fuse/include/linux/dax.h	2020-01-03 11:20:08.942186062 -0500
> @@ -129,11 +129,6 @@ static inline bool generic_fsdax_support
>  			sectors);
>  }
>  
> -static inline struct dax_device *fs_dax_get_by_host(const char *host)
> -{
> -	return dax_get_by_host(host);
> -}
> -
>  static inline void fs_put_dax(struct dax_device *dax_dev)
>  {
>  	put_dax(dax_dev);
> @@ -160,11 +155,6 @@ static inline bool generic_fsdax_support
>  	return false;
>  }
>  
> -static inline struct dax_device *fs_dax_get_by_host(const char *host)
> -{
> -	return NULL;
> -}
> -
>  static inline void fs_put_dax(struct dax_device *dax_dev)
>  {
>  }