mm/compaction: remove repeat compact_blockskip_flush check in reset_isolation_suitable

We have compact_blockskip_flush check in __reset_isolation_suitable, just
remove repeat check before __reset_isolation_suitable in
compact_blockskip_flush.

Link: https://lkml.kernel.org/r/20230901155141.249860-5-shikemeng@huaweicloud.comSigned-off-by: Kemeng Shi <shikemeng@huaweicloud.com>
Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Acked-by: Mel Gorman <mgorman@techsingularity.net>
Cc: David Hildenbrand <david@redhat.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

mm/compaction.c

@@ -382,6 +382,7 @@ static void __reset_isolation_suitable(struct zone *zone)
 	bool source_set = false;
 	bool free_set = false;
 
+	/* Only flush if a full compaction finished recently */
 	if (!zone->compact_blockskip_flush)
 		return;
 
@@ -434,9 +435,7 @@ void reset_isolation_suitable(pg_data_t *pgdat)
 		if (!populated_zone(zone))
 			continue;
 
-		/* Only flush if a full compaction finished recently */
-		if (zone->compact_blockskip_flush)
-			__reset_isolation_suitable(zone);
+		__reset_isolation_suitable(zone);
 	}
 }