mm, compaction: cleanup unused functions

Since kswapd compaction moved to kcompactd, compact_pgdat() is not
called anymore, so we remove it.  The only caller of __compact_pgdat()
is compact_node(), so we merge them and remove code that was only
reachable from kswapd.

Link: http://lkml.kernel.org/r/20160810091226.6709-3-vbabka@suse.cz
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Tested-by: Lorenzo Stoakes <lstoakes@gmail.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Rik van Riel <riel@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 0 insertions, 5 deletions

diff --git a/include/linux/compaction.h b/include/linux/compaction.h
index d4e106b5dc27..1bb58581301c 100644
--- a/include/linux/compaction.h
+++ b/include/linux/compaction.h
@@ -70,7 +70,6 @@ extern int fragmentation_index(struct zone *zone, unsigned int order);
 extern enum compact_result try_to_compact_pages(gfp_t gfp_mask,
                 unsigned int order, unsigned int alloc_flags,
                 const struct alloc_context *ac, enum compact_priority prio);
-extern void compact_pgdat(pg_data_t *pgdat, int order);
 extern void reset_isolation_suitable(pg_data_t *pgdat);
 extern enum compact_result compaction_suitable(struct zone *zone, int order,
                 unsigned int alloc_flags, int classzone_idx);
@@ -154,10 +153,6 @@ extern void kcompactd_stop(int nid);
 extern void wakeup_kcompactd(pg_data_t *pgdat, int order, int classzone_idx);
 
 #else
-static inline void compact_pgdat(pg_data_t *pgdat, int order)
-{
-}
-
 static inline void reset_isolation_suitable(pg_data_t *pgdat)
 {
 }