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Re: [PATCH 03/47] xfs: fix attr shortform structure alignment on cris

To: "Darrick J. Wong" <darrick.wong@xxxxxxxxxx>
Subject: Re: [PATCH 03/47] xfs: fix attr shortform structure alignment on cris
From: Brian Foster <bfoster@xxxxxxxxxx>
Date: Tue, 26 Jul 2016 12:36:02 -0400
Cc: david@xxxxxxxxxxxxx, linux-fsdevel@xxxxxxxxxxxxxxx, vishal.l.verma@xxxxxxxxx, xfs@xxxxxxxxxxx
Delivered-to: xfs@xxxxxxxxxxx
In-reply-to: <146907698036.25461.13007151908183013504.stgit@xxxxxxxxxxxxxxxx>
References: <146907695530.25461.3225785294902719773.stgit@xxxxxxxxxxxxxxxx> <146907698036.25461.13007151908183013504.stgit@xxxxxxxxxxxxxxxx>
User-agent: Mutt/1.6.2 (2016-07-01)
On Wed, Jul 20, 2016 at 09:56:20PM -0700, Darrick J. Wong wrote:
> Apparently cris doesn't require structure stride to align with the
> largest type in the struct, so list[0] isn't at offset 4 like it is
> everywhere else.  Fix this... insofar as existing XFSes on cris are
> screwed.
> 
> Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
> ---

Reviewed-by: Brian Foster <bfoster@xxxxxxxxxx>

>  fs/xfs/libxfs/xfs_da_format.h |    1 +
>  1 file changed, 1 insertion(+)
> 
> 
> diff --git a/fs/xfs/libxfs/xfs_da_format.h b/fs/xfs/libxfs/xfs_da_format.h
> index 685f23b..9a492a9 100644
> --- a/fs/xfs/libxfs/xfs_da_format.h
> +++ b/fs/xfs/libxfs/xfs_da_format.h
> @@ -629,6 +629,7 @@ typedef struct xfs_attr_shortform {
>       struct xfs_attr_sf_hdr {        /* constant-structure header block */
>               __be16  totsize;        /* total bytes in shortform list */
>               __u8    count;  /* count of active entries */
> +             __u8    padding;
>       } hdr;
>       struct xfs_attr_sf_entry {
>               __uint8_t namelen;      /* actual length of name (no NULL) */
> 
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