Re: [PATCH 2/2] fs: Move swap_[de]activate to file_operations

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On Mon, 11 Nov 2019 16:34:52 -0800 ira.weiny@xxxxxxxxx wrote:

> From: Ira Weiny <ira.weiny@xxxxxxxxx>
> 
> swap_activate() and swap_deactivate() have nothing to do with
> address spaces.  We want to eventually make the address space operations
> dynamic to switch inode flags on the fly.

What does this mean?

>  So to simplify this code as
> well as properly track these operations we move these functions to the
> file_operations vector.
> 
> This has been tested with XFS but not NFS, f2fs, or btrfs.
> 
> Also note f2fs and xfs have simple moves of their functions to
> facilitate compilation.  No functional changes are contained within
> those functions.
>
> ...
>
> --- a/fs/btrfs/inode.c
> +++ b/fs/btrfs/inode.c
> @@ -11002,6 +11002,8 @@ static const struct file_operations btrfs_dir_file_operations = {
>  #endif
>  	.release        = btrfs_release_file,
>  	.fsync		= btrfs_sync_file,
> +	.swap_activate	= btrfs_swap_activate,
> +	.swap_deactivate = btrfs_swap_deactivate,
>  };

Shouldn't this be btrfs_file_operations?






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