linux-kernel - [PATCH] mm: delete the unused put_pages

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Message-ID: <d9985d6a-293e-176b-e63d-82fdfd28c139@google.com>
Date: Sun, 27 Oct 2024 13:14:42 -0700 (PDT)
From: Hugh Dickins <hughd@...gle.com>
To: Andrew Morton <akpm@...ux-foundation.org>
cc: Pasha Tatashin <pasha.tatashin@...een.com>, Yang Shi <shy828301@...il.com>, 
    Matthew Wilcox <willy@...radead.org>, David Hildenbrand <david@...hat.com>, 
    Peter Xu <peterx@...hat.com>, linux-kernel@...r.kernel.org, 
    linux-mm@...ck.org
Subject: [PATCH] mm: delete the unused put_pages_list()

The last user of put_pages_list() converted away from it in 6.10 commit
06c375053cef ("iommu/vt-d: add wrapper functions for page allocations"):
delete put_pages_list().

Signed-off-by: Hugh Dickins <hughd@...gle.com>
---
 include/linux/mm.h |  2 --
 mm/swap.c          | 31 -------------------------------
 2 files changed, 33 deletions(-)

diff --git a/include/linux/mm.h b/include/linux/mm.h
index ecf63d2b0582..8524bf86dd74 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1286,8 +1286,6 @@ static inline struct folio *virt_to_folio(const void *x)
 
 void __folio_put(struct folio *folio);
 
-void put_pages_list(struct list_head *pages);
-
 void split_page(struct page *page, unsigned int order);
 void folio_copy(struct folio *dst, struct folio *src);
 int folio_mc_copy(struct folio *dst, struct folio *src);
diff --git a/mm/swap.c b/mm/swap.c
index b8e3259ea2c4..638a3f001676 100644
--- a/mm/swap.c
+++ b/mm/swap.c
@@ -127,37 +127,6 @@ void __folio_put(struct folio *folio)
 }
 EXPORT_SYMBOL(__folio_put);
 
-/**
- * put_pages_list() - release a list of pages
- * @pages: list of pages threaded on page->lru
- *
- * Release a list of pages which are strung together on page.lru.
- */
-void put_pages_list(struct list_head *pages)
-{
-	struct folio_batch fbatch;
-	struct folio *folio, *next;
-
-	folio_batch_init(&fbatch);
-	list_for_each_entry_safe(folio, next, pages, lru) {
-		if (!folio_put_testzero(folio))
-			continue;
-		if (folio_test_hugetlb(folio)) {
-			free_huge_folio(folio);
-			continue;
-		}
-		/* LRU flag must be clear because it's passed using the lru */
-		if (folio_batch_add(&fbatch, folio) > 0)
-			continue;
-		free_unref_folios(&fbatch);
-	}
-
-	if (fbatch.nr)
-		free_unref_folios(&fbatch);
-	INIT_LIST_HEAD(pages);
-}
-EXPORT_SYMBOL(put_pages_list);
-
 typedef void (*move_fn_t)(struct lruvec *lruvec, struct folio *folio);
 
 static void lru_add(struct lruvec *lruvec, struct folio *folio)
-- 
2.35.3