From: Baoquan He <bhe@redhat.com>
Date: Tue, 25 Oct 2022 03:11:45 +0000 (+0800)
Subject: mm/percpu: use list_first_entry_or_null in pcpu_reclaim_populated()
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=c1f6688d35d47ca11200789b000b3b20f5ecdbd9;p=linux.git

mm/percpu: use list_first_entry_or_null in pcpu_reclaim_populated()

To replace list_empty()/list_first_entry() pair to simplify code.

Signed-off-by: Baoquan He <bhe@redhat.com>
Acked-by: Dennis Zhou <dennis@kernel.org>
Signed-off-by: Dennis Zhou <dennis@kernel.org>
---

diff --git a/mm/percpu.c b/mm/percpu.c
index 26d8cd2ca3230..841bb93aaae68 100644
--- a/mm/percpu.c
+++ b/mm/percpu.c
@@ -2143,9 +2143,9 @@ static void pcpu_reclaim_populated(void)
 	 * other accessor is the free path which only returns area back to the
 	 * allocator not touching the populated bitmap.
 	 */
-	while (!list_empty(&pcpu_chunk_lists[pcpu_to_depopulate_slot])) {
-		chunk = list_first_entry(&pcpu_chunk_lists[pcpu_to_depopulate_slot],
-					 struct pcpu_chunk, list);
+	while ((chunk = list_first_entry_or_null(
+			&pcpu_chunk_lists[pcpu_to_depopulate_slot],
+			struct pcpu_chunk, list))) {
 		WARN_ON(chunk->immutable);
 
 		/*