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[PATCH] mm/compaction: fix the comment for try_to_compact_pages

"mode" argument is not used by try_to_compact_pages() and sub functions
anymore, it has been replaced by "prio". Fix the comment to explain the
use of "prio" argument.

Cc: Vlastimil Babka <vbabka@xxxxxxx>
Cc: Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx>
Cc: David Rientjes <rientjes@xxxxxxxxxx>
Cc: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxx>
Signed-off-by: Yang Shi <yang.shi@xxxxxxxxxxxxxxxxx>
 mm/compaction.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/compaction.c b/mm/compaction.c
index 10cd757..2c8999d 100644
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -1738,7 +1738,7 @@ static enum compact_result compact_zone_order(struct zone *zone, int order,
  * @order: The order of the current allocation
  * @alloc_flags: The allocation flags of the current allocation
  * @ac: The context of current allocation
- * @mode: The migration mode for async, sync light, or sync migration
+ * @prio: Determines how hard direct compaction should try to succeed
  * This is the main entry point for direct page compaction.