Re: [PATCH 09/11] md-bitmap: don't use ->index for pages backing the bitmap file

[Hannes Reinecke <hare@xxxxxxx>]

On 6/15/23 08:48, Christoph Hellwig wrote:
> The md driver allocates pages for storing the bitmap file data, which
> are not page cache pages, and then stores the page granularity file
> offset in page->index, which is a field that isn't really valid except
> for page cache pages.
Hmm. Willy told me that ->index is free to use if you're not dealing 
with page cache pages (brd does the same thing).

Cheers,

Hannes