linux-kernel - Re: [PATCH v7 07/61] fscache: Use appropriate radix tree accessors

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Date:   Sat, 03 Mar 2018 08:57:48 -0500
From:   Jeff Layton <jlayton@...hat.com>
To:     Matthew Wilcox <willy@...radead.org>,
        Andrew Morton <akpm@...ux-foundation.org>
Cc:     Matthew Wilcox <mawilcox@...rosoft.com>,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH v7 07/61] fscache: Use appropriate radix tree accessors

On Mon, 2018-02-19 at 11:45 -0800, Matthew Wilcox wrote:
> From: Matthew Wilcox <mawilcox@...rosoft.com>
> 
> Don't open-code accesses to data structure internals.
> 
> Signed-off-by: Matthew Wilcox <mawilcox@...rosoft.com>
> ---
>  fs/fscache/cookie.c | 2 +-
>  fs/fscache/object.c | 2 +-
>  2 files changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/fs/fscache/cookie.c b/fs/fscache/cookie.c
> index ff84258132bb..e9054e0c1a49 100644
> --- a/fs/fscache/cookie.c
> +++ b/fs/fscache/cookie.c
> @@ -608,7 +608,7 @@ void __fscache_relinquish_cookie(struct fscache_cookie *cookie, bool retire)
>  	/* Clear pointers back to the netfs */
>  	cookie->netfs_data	= NULL;
>  	cookie->def		= NULL;
> -	BUG_ON(cookie->stores.rnode);
> +	BUG_ON(!radix_tree_empty(&cookie->stores));
>  
>  	if (cookie->parent) {
>  		ASSERTCMP(atomic_read(&cookie->parent->usage), >, 0);
> diff --git a/fs/fscache/object.c b/fs/fscache/object.c
> index 7a182c87f378..aa0e71f02c33 100644
> --- a/fs/fscache/object.c
> +++ b/fs/fscache/object.c
> @@ -956,7 +956,7 @@ static const struct fscache_state *_fscache_invalidate_object(struct fscache_obj
>  	 * retire the object instead.
>  	 */
>  	if (!fscache_use_cookie(object)) {
> -		ASSERT(object->cookie->stores.rnode == NULL);
> +		ASSERT(radix_tree_empty(&object->cookie->stores));
>  		set_bit(FSCACHE_OBJECT_RETIRED, &object->flags);
>  		_leave(" [no cookie]");
>  		return transit_to(KILL_OBJECT);

Reviewed-by: Jeff Layton <jlayton@...hat.com>