ksm: convert cmp_and_merge_page() to use a folio

By making try_to_merge_two_pages() and stable_tree_search() return a
folio, we can replace kpage with kfolio.  This replaces 7 calls to
compound_head() with one.

[[email protected]: add IS_ERR_OR_NULL check for stable_tree_search()]
  Signed-off-by: Gaosheng Cui <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Matthew Wilcox (Oracle) <[email protected]>
Acked-by: David Hildenbrand <[email protected]>
Cc: Alex Shi <[email protected]>
Cc: Gaosheng Cui <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

0 files changed, 0 insertions, 0 deletions