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zsmalloc: use page->private instead of page->first_page
We are going to rework how compound_head() work. It will not use page->first_page as we have it now. The only other user of page->first_page beyond compound pages is zsmalloc. Let's use page->private instead of page->first_page here. It occupies the same storage space. Signed-off-by: Kirill A. Shutemov <[email protected]> Acked-by: Vlastimil Babka <[email protected]> Reviewed-by: Sergey Senozhatsky <[email protected]> Reviewed-by: Andrea Arcangeli <[email protected]> Cc: "Paul E. McKenney" <[email protected]> Cc: Andi Kleen <[email protected]> Cc: Aneesh Kumar K.V <[email protected]> Cc: Christoph Lameter <[email protected]> Cc: David Rientjes <[email protected]> Cc: Hugh Dickins <[email protected]> Cc: Joonsoo Kim <[email protected]> Cc: Michal Hocko <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
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