mm: compaction: clean up comment about suitable migration target recheck

checked_pageblock is already removed and suitable_migration_target is not
rechecked under the zone lock since commit f8224aa5a0a4 ("mm, compaction:
do not recheck suitable_migration_target under lock").  Correct the
comment accordingly.

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Miaohe Lin <[email protected]>
Cc: Charan Teja Kalla <[email protected]>
Cc: David Hildenbrand <[email protected]>
Cc: Pintu Kumar <[email protected]>
Cc: Vlastimil Babka <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

1 files changed, 1 insertions, 7 deletions

diff --git a/mm/compaction.c b/mm/compaction.c
index e839b26fb3d8..97821b7d7a4f 100644
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -599,13 +599,7 @@ static unsigned long isolate_freepages_block(struct compact_control *cc,
 		if (!PageBuddy(page))
 			goto isolate_fail;
 
-		/*
-		 * If we already hold the lock, we can skip some rechecking.
-		 * Note that if we hold the lock now, checked_pageblock was
-		 * already set in some previous iteration (or strict is true),
-		 * so it is correct to skip the suitable migration target
-		 * recheck as well.
-		 */
+		/* If we already hold the lock, we can skip some rechecking. */
 		if (!locked) {
 			locked = compact_lock_irqsave(&cc->zone->lock,
 								&flags, cc);