[PATCH 1/5] xfs: struct xfs_sb is no longer tied to the on-disk format

[Christoph Hellwig]

>  /*
> - * Superblock - in core version.  Must match the ondisk version below.
> - * Must be padded to 64 bit alignment.
> - */
> -typedef struct xfs_sb {
> -	__uint32_t	sb_magicnum;	/* magic number == XFS_SB_MAGIC */
> -	__uint32_t	sb_blocksize;	/* logical block size, bytes */

> -static inline int xfs_sb_version_hasfinobt(xfs_sb_t *sbp)
> +static inline int xfs_sb_version_hasfinobt(struct xfs_sb *sbp)

So xfs_format.h now requires struct xfs_sb to be defined before it
can be included?  I guess we need to move these macros around as well.

> diff --git a/fs/xfs/xfs_super.h b/fs/xfs/xfs_super.h
> index 2b830c2..a02236b 100644
> --- a/fs/xfs/xfs_super.h
> +++ b/fs/xfs/xfs_super.h
> @@ -61,6 +61,87 @@ struct xfs_mount;
>  struct xfs_buftarg;
>  struct block_device;
>  
> +/*
> + * Superblock - in core version.  This does not have ot match the size and shape
> + * of the on-disk superblock, but must contain all the fields that we use in the
> + * on-disk superblock.
> + */
> +struct xfs_sb {

Is this really the right header?  xfs_super.h only really is for bits
related to linux super block operastions.

I'd expect to move it close to stuct xfs_mount, and maybe even merge
it into that in the long run.