Re: [PATCH 03/10] dax: don't pass buffer_head to dax_insert_mapping

[Ross Zwisler <ross.zwisler-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>]

On Fri, Sep 09, 2016 at 06:34:37PM +0200, Christoph Hellwig wrote:
> This way we can use this helper for the iomap based DAX implementation
> as well.
> 
> Signed-off-by: Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org>

Reviewed-by: Ross Zwisler <ross.zwisler-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>

> ---
>  fs/dax.c | 12 ++++++------
>  1 file changed, 6 insertions(+), 6 deletions(-)
> 
> diff --git a/fs/dax.c b/fs/dax.c
> index 993dc6f..98463bb 100644
> --- a/fs/dax.c
> +++ b/fs/dax.c
> @@ -790,14 +790,13 @@ int dax_writeback_mapping_range(struct address_space *mapping,
>  EXPORT_SYMBOL_GPL(dax_writeback_mapping_range);
>  
>  static int dax_insert_mapping(struct address_space *mapping,
> -			struct buffer_head *bh, void **entryp,
> -			struct vm_area_struct *vma, struct vm_fault *vmf)
> +		struct block_device *bdev, sector_t sector, size_t size,
> +		void **entryp, struct vm_area_struct *vma, struct vm_fault *vmf)
>  {
>  	unsigned long vaddr = (unsigned long)vmf->virtual_address;
> -	struct block_device *bdev = bh->b_bdev;
>  	struct blk_dax_ctl dax = {
> -		.sector = to_sector(bh, mapping->host),
> -		.size = bh->b_size,
> +		.sector = sector,
> +		.size = size,
>  	};
>  	void *ret;
>  	void *entry = *entryp;
> @@ -898,7 +897,8 @@ int dax_fault(struct vm_area_struct *vma, struct vm_fault *vmf,
>  
>  	/* Filesystem should not return unwritten buffers to us! */
>  	WARN_ON_ONCE(buffer_unwritten(&bh) || buffer_new(&bh));
> -	error = dax_insert_mapping(mapping, &bh, &entry, vma, vmf);
> +	error = dax_insert_mapping(mapping, bh.b_bdev, to_sector(&bh, inode),
> +			bh.b_size, &entry, vma, vmf);
>   unlock_entry:
>  	put_locked_mapping_entry(mapping, vmf->pgoff, entry);
>   out:
> -- 
> 2.1.4
> 
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