From: Miaohe Lin <linmiaohe@huawei.com>
Subject: mm/z3fold: remove redundant list_del_init of zhdr->buddy in z3fold_free

do_compact_page() will do list_del_init(&zhdr->buddy) for us.  Remove this
extra one to save some possible cpu cycles.

Link: https://lkml.kernel.org/r/20220308134311.59086-8-linmiaohe@huawei.com
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Reviewed-by: Vitaly Wool <vitaly.wool@konsulko.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/z3fold.c |    3 ---
 1 file changed, 3 deletions(-)

--- a/mm/z3fold.c~mm-z3fold-remove-redundant-list_del_init-of-zhdr-buddy-in-z3fold_free
+++ a/mm/z3fold.c
@@ -1244,9 +1244,6 @@ static void z3fold_free(struct z3fold_po
 		return;
 	}
 	if (zhdr->cpu < 0 || !cpu_online(zhdr->cpu)) {
-		spin_lock(&pool->lock);
-		list_del_init(&zhdr->buddy);
-		spin_unlock(&pool->lock);
 		zhdr->cpu = -1;
 		kref_get(&zhdr->refcount);
 		clear_bit(PAGE_CLAIMED, &page->private);
_