Re: [PATCH 09/18] xfs: allow unaligned extent records in xfs_bmbt_disk_set_all

[Brian Foster <bfoster@redhat.com>]

On Tue, Oct 31, 2017 at 04:22:21PM +0200, Christoph Hellwig wrote:
> To make life a little simpler make xfs_bmbt_set_all unaligned access
> aware so that we can use it directly on the destination buffer.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---

Reviewed-by: Brian Foster <bfoster@redhat.com>

>  fs/xfs/libxfs/xfs_bmap_btree.c | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/fs/xfs/libxfs/xfs_bmap_btree.c b/fs/xfs/libxfs/xfs_bmap_btree.c
> index 086e6fc8e4fc..89260972a0f6 100644
> --- a/fs/xfs/libxfs/xfs_bmap_btree.c
> +++ b/fs/xfs/libxfs/xfs_bmap_btree.c
> @@ -199,14 +199,14 @@ xfs_bmbt_disk_set_all(
>  	ASSERT(!(s->br_blockcount & xfs_mask64hi(64-BMBT_BLOCKCOUNT_BITLEN)));
>  	ASSERT(!(s->br_startblock & xfs_mask64hi(64-BMBT_STARTBLOCK_BITLEN)));
>  
> -	r->l0 = cpu_to_be64(
> +	put_unaligned_be64(
>  		((xfs_bmbt_rec_base_t)extent_flag << 63) |
>  		 ((xfs_bmbt_rec_base_t)s->br_startoff << 9) |
> -		 ((xfs_bmbt_rec_base_t)s->br_startblock >> 43));
> -	r->l1 = cpu_to_be64(
> +		 ((xfs_bmbt_rec_base_t)s->br_startblock >> 43), &r->l0);
> +	put_unaligned_be64(
>  		((xfs_bmbt_rec_base_t)s->br_startblock << 21) |
>  		 ((xfs_bmbt_rec_base_t)s->br_blockcount &
> -		  (xfs_bmbt_rec_base_t)xfs_mask64lo(21)));
> +		  (xfs_bmbt_rec_base_t)xfs_mask64lo(21)), &r->l1);
>  }
>  
>  /*
> -- 
> 2.14.2
> 
> --
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