[PATCH] xfs: fix superblock inprogress check

[Christoph Hellwig]

On Mon, Aug 22, 2016 at 03:39:27PM +1000, Dave Chinner wrote:
> From: Dave Chinner <dchinner at redhat.com>
> 
> >From inspection, the superblock sb_inprogress check is done in the
> verifier and triggered only for the primary superblock via a
> "bp->b_bn == XFS_SB_DADDR" check.
> 
> Unfortunately, the primary superblock is an uncached buffer, and
> hence it is configured by xfs_buf_read_uncached() with:
> 
> 	bp->b_bn = XFS_BUF_DADDR_NULL;  /* always null for uncached buffers */

Hmm, I wonder why we did that, it seems a bit counter intuitive.

But the patch itself looks fine,

Reviewed-by: Christoph Hellwig <hch at lst.de>