[PATCH v2 2/8] mm/percpu: use list_first_entry_or_null in pcpu_reclaim_populated()

Baoquan He
2022-10-25T03:12:04Z

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>
---
v1->v2:
- Add parentheses around assignment in the while condition. This mutes
the lkp warning.

mm/percpu.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/mm/percpu.c b/mm/percpu.c
index 26d8cd2ca323..841bb93aaae6 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);

/*
--
2.34.1