linux-kernel - Re: [PATCH 1/6] afs: Fix afs_launder_page() to set correct start file position

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Date:   Tue, 24 Aug 2021 15:18:07 +0100
From:   Christoph Hellwig <hch@...radead.org>
To:     David Howells <dhowells@...hat.com>
Cc:     "Matthew Wilcox (Oracle)" <willy@...radead.org>,
        Jeffrey Altman <jaltman@...istor.com>,
        linux-afs@...ts.infradead.org, Jeff Layton <jlayton@...nel.org>,
        Ilya Dryomov <idryomov@...il.com>,
        linux-fsdevel@...r.kernel.org, linux-cachefs@...hat.com,
        linux-nfs@...r.kernel.org, linux-cifs@...r.kernel.org,
        ceph-devel@...r.kernel.org, v9fs-developer@...ts.sourceforge.net,
        devel@...ts.orangefs.org, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/6] afs: Fix afs_launder_page() to set correct start
 file position

On Tue, Aug 24, 2021 at 02:24:47PM +0100, David Howells wrote:
> +		ret = afs_store_data(vnode, &iter,
> +				     (loff_t)page->index * PAGE_SIZE + f, true);

You probably want to use page_offset() here:

		ret = afs_store_data(vnode, &iter, page_offset(page) + f, true);