mm/z3fold: minor clean up for z3fold_free

Use put_z3fold_header() to pair with get_z3fold_header.  Also fix the
wrong comments.  Minor readability improvement.

Link: https://lkml.kernel.org/r/20220308134311.59086-4-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>

diff --git a/mm/z3fold.c b/mm/z3fold.c
index 87689f5..eb89271 100644 (file)
--- a/mm/z3fold.c
+++ b/mm/z3fold.c
@@ -1187,9 +1187,9 @@ headless:
  * @handle:    handle associated with the allocation returned by z3fold_alloc()
  *
  * In the case that the z3fold page in which the allocation resides is under
- * reclaim, as indicated by the PG_reclaim flag being set, this function
- * only sets the first|last_chunks to 0.  The page is actually freed
- * once both buddies are evicted (see z3fold_reclaim_page() below).
+ * reclaim, as indicated by the PAGE_CLAIMED flag being set, this function
+ * only sets the first|middle|last_chunks to 0.  The page is actually freed
+ * once all buddies are evicted (see z3fold_reclaim_page() below).
  */
 static void z3fold_free(struct z3fold_pool *pool, unsigned long handle)
 {
@@ -1247,7 +1247,7 @@ static void z3fold_free(struct z3fold_pool *pool, unsigned long handle)
        }
        if (page_claimed) {
                /* the page has not been claimed by us */
-               z3fold_page_unlock(zhdr);
+               put_z3fold_header(zhdr);
                return;
        }
        if (test_and_set_bit(NEEDS_COMPACTING, &page->private)) {