On Wed, Dec 01, 2021 at 07:15:04PM +0100, Vlastimil Babka wrote:

From: "Matthew Wilcox (Oracle)" <willy@infradead.org>

The ->freelist and ->units members of struct page are for the use of slab
only.  I'm not particularly familiar with zsmalloc, so generate the same
code by using page->index to store 'page' (page->index and page->freelist
are at the same offset in struct page).  This should be cleaned up
properly at some point by somebody who is familiar with zsmalloc.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Vlastimil Babka <redacted>

Acked-by: Minchan Kim <minchan@kernel.org>