Re: [Linux-cachefs] [PATCH] netfs: fix parameter of cleanup()

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On Tue, 2021-12-07 at 11:14 +0800, Jeffle Xu wrote:
> The order of these two parameters is just reversed. gcc didn't warn on
> that, probably because 'void *' can be converted from or to other
> pointer types without warning.
> 
> Cc: stable@xxxxxxxxxxxxxxx
> Fixes: 3d3c95046742 ("netfs: Provide readahead and readpage netfs helpers")
> Fixes: e1b1240c1ff5 ("netfs: Add write_begin helper")
> Signed-off-by: Jeffle Xu <jefflexu@xxxxxxxxxxxxxxxxx>
> ---
>  fs/netfs/read_helper.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/fs/netfs/read_helper.c b/fs/netfs/read_helper.c
> index 7046f9bdd8dc..4adcb0336ecf 100644
> --- a/fs/netfs/read_helper.c
> +++ b/fs/netfs/read_helper.c
> @@ -960,7 +960,7 @@ int netfs_readpage(struct file *file,
>  	rreq = netfs_alloc_read_request(ops, netfs_priv, file);
>  	if (!rreq) {
>  		if (netfs_priv)
> -			ops->cleanup(netfs_priv, folio_file_mapping(folio));
> +			ops->cleanup(folio_file_mapping(folio), netfs_priv);
>  		folio_unlock(folio);
>  		return -ENOMEM;
>  	}
> @@ -1191,7 +1191,7 @@ int netfs_write_begin(struct file *file, struct address_space *mapping,
>  		goto error;
>  have_folio_no_wait:
>  	if (netfs_priv)
> -		ops->cleanup(netfs_priv, mapping);
> +		ops->cleanup(mapping, netfs_priv);
>  	*_folio = folio;
>  	_leave(" = 0");
>  	return 0;
> @@ -1202,7 +1202,7 @@ int netfs_write_begin(struct file *file, struct address_space *mapping,
>  	folio_unlock(folio);
>  	folio_put(folio);
>  	if (netfs_priv)
> -		ops->cleanup(netfs_priv, mapping);
> +		ops->cleanup(mapping, netfs_priv);
>  	_leave(" = %d", ret);
>  	return ret;
>  }

Ouch, good catch.

Reviewed-by: Jeff Layton <jlayton@xxxxxxxxxx>




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