linux-ext4 - Re: [PATCH 09/13] dax: Allow dax_iomap

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Message-ID: <20170823183400.GG13778@infradead.org>
Date:   Wed, 23 Aug 2017 11:34:00 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     Jan Kara <jack@...e.cz>
Cc:     linux-fsdevel@...r.kernel.org,
        Christoph Hellwig <hch@...radead.org>,
        Boaz Harrosh <boazh@...app.com>, linux-nvdimm@...ts.01.org,
        linux-xfs@...r.kernel.org, Andy Lutomirski <luto@...nel.org>,
        linux-ext4@...r.kernel.org
Subject: Re: [PATCH 09/13] dax: Allow dax_iomap_fault() to return pfn

> @@ -1416,6 +1416,7 @@ static int dax_iomap_pmd_fault(struct vm_fault *vmf,
>   * @vmf: The description of the fault
>   * @pe_size: Size of the page to fault in
>   * @ops: Iomap ops passed from the file system
> + * @pfnp: PFN to insert for synchronous faults if fsync is required
>   *
>   * When a page fault occurs, filesystems may call this helper in
>   * their fault handler for DAX files. dax_iomap_fault() assumes the caller
> @@ -1423,13 +1424,13 @@ static int dax_iomap_pmd_fault(struct vm_fault *vmf,
>   * successfully.
>   */
>  int dax_iomap_fault(struct vm_fault *vmf, enum page_entry_size pe_size,
> -		    const struct iomap_ops *ops)
> +		    const struct iomap_ops *ops, pfn_t *pfnp)

Please keep the iomap_ops argument the last one for the exported
function (and probably all others for consistency).

Otherwise looks good:

Reviewed-by: Christoph Hellwig <hch@....de>