[PATCH] xfs: remove incorrect assert in xfs_vm_writepage

[Alex Elder]

On Wed, 2010-11-10 at 16:39 -0500, Christoph Hellwig wrote:
> In commit 20cb52ebd1b5ca6fa8a5d9b6b1392292f5ca8a45, titled
> "xfs: simplify xfs_vm_writepage" I added an assert that any !mapped
> and
> uptodate buffers are not dirty.  That asserts turns out to trigger a
> lot
> when running fsx on filesystems with small block sizes.  The reason
> for
> that is that the assert is simply incorrect.  !mapped and uptodate
> just mean this buffer covers a hole, and whenever we do a
> set_page_dirty
> we mark all blocks in the page dirty, no matter if they have data or
> not.  So remove the assert, and update the comment above the condition
> to match reality.
> 
> Signed-off-by: Christoph Hellwig <hch at lst.de>

Looks good.

Reviewed-by: Alex Elder <aelder at sgi.com>