linux-next: build warning after merge of the mm tree

Hi all,

After merging the mm tree, today's linux-next build (htmldocs) produced
this warning:

include/linux/mm.h:1214: warning: cannot understand function prototype: 'typedef union '

Introduced by commit

  4a3df046c983 ("mm: teach release_pages() to take an array of encoded page pointers too")

-- 
Cheers,
Stephen Rothwell