mm/vmscan: not necessary to re-init the list for each iteration

node_page_list is defined with LIST_HEAD and be cleaned until
list_empty.

So it is not necessary to re-init it again.

[akpm@linux-foundation.org: remove unneeded braces]
Link: https://lkml.kernel.org/r/20220426021743.21007-1-richard.weiyang@gmail.comSigned-off-by: NWei Yang <richard.weiyang@gmail.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>

mm/vmscan.c

@@ -2553,10 +2553,8 @@ unsigned long reclaim_pages(struct list_head *page_list)
 
 	while (!list_empty(page_list)) {
 		page = lru_to_page(page_list);
-		if (nid == NUMA_NO_NODE) {
+		if (nid == NUMA_NO_NODE)
 			nid = page_to_nid(page);
-			INIT_LIST_HEAD(&node_page_list);
-		}
 
 		if (nid == page_to_nid(page)) {
 			ClearPageActive(page);