linux-kernel - [PATCH v2 10/12] mm: Remove pagevec_lookup

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Message-Id: <20200914130042.11442-11-willy@infradead.org>
Date:   Mon, 14 Sep 2020 14:00:40 +0100
From:   "Matthew Wilcox (Oracle)" <willy@...radead.org>
To:     linux-mm@...ck.org
Cc:     "Matthew Wilcox (Oracle)" <willy@...radead.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Hugh Dickins <hughd@...gle.com>,
        William Kucharski <william.kucharski@...cle.com>,
        Johannes Weiner <hannes@...xchg.org>, Jan Kara <jack@...e.cz>,
        Yang Shi <yang.shi@...ux.alibaba.com>,
        Dave Chinner <dchinner@...hat.com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2 10/12] mm: Remove pagevec_lookup_entries

pagevec_lookup_entries() is now just a wrapper around find_get_entries()
so remove it and convert all its callers.

Signed-off-by: Matthew Wilcox (Oracle) <willy@...radead.org>
---
 include/linux/pagevec.h |  3 ---
 mm/swap.c               | 36 ++----------------------------------
 mm/truncate.c           |  4 ++--
 3 files changed, 4 insertions(+), 39 deletions(-)

diff --git a/include/linux/pagevec.h b/include/linux/pagevec.h
index ce77724a2ab7..a45bea4b4d08 100644
--- a/include/linux/pagevec.h
+++ b/include/linux/pagevec.h
@@ -25,9 +25,6 @@ struct pagevec {
 
 void __pagevec_release(struct pagevec *pvec);
 void __pagevec_lru_add(struct pagevec *pvec);
-unsigned pagevec_lookup_entries(struct pagevec *pvec,
-		struct address_space *mapping, pgoff_t start, pgoff_t end,
-		pgoff_t *indices);
 void pagevec_remove_exceptionals(struct pagevec *pvec);
 unsigned pagevec_lookup_range(struct pagevec *pvec,
 			      struct address_space *mapping,
diff --git a/mm/swap.c b/mm/swap.c
index 40b23300d353..cc0d648f79d4 100644
--- a/mm/swap.c
+++ b/mm/swap.c
@@ -1031,44 +1031,12 @@ void __pagevec_lru_add(struct pagevec *pvec)
 	pagevec_lru_move_fn(pvec, __pagevec_lru_add_fn, NULL);
 }
 
-/**
- * pagevec_lookup_entries - gang pagecache lookup
- * @pvec:	Where the resulting entries are placed
- * @mapping:	The address_space to search
- * @start:	The starting entry index
- * @end:	The highest index to return (inclusive).
- * @nr_entries:	The maximum number of pages
- * @indices:	The cache indices corresponding to the entries in @pvec
- *
- * pagevec_lookup_entries() will search for and return a group of up
- * to @nr_pages pages and shadow entries in the mapping.  All
- * entries are placed in @pvec.  pagevec_lookup_entries() takes a
- * reference against actual pages in @pvec.
- *
- * The search returns a group of mapping-contiguous entries with
- * ascending indexes.  There may be holes in the indices due to
- * not-present entries.
- *
- * Only one subpage of a Transparent Huge Page is returned in one call:
- * allowing truncate_inode_pages_range() to evict the whole THP without
- * cycling through a pagevec of extra references.
- *
- * pagevec_lookup_entries() returns the number of entries which were
- * found.
- */
-unsigned pagevec_lookup_entries(struct pagevec *pvec,
-		struct address_space *mapping, pgoff_t start, pgoff_t end,
-		pgoff_t *indices)
-{
-	return find_get_entries(mapping, start, end, pvec, indices);
-}
-
 /**
  * pagevec_remove_exceptionals - pagevec exceptionals pruning
  * @pvec:	The pagevec to prune
  *
- * pagevec_lookup_entries() fills both pages and exceptional radix
- * tree entries into the pagevec.  This function prunes all
+ * find_get_entries() fills both pages and XArray value entries (aka
+ * exceptional entries) into the pagevec.  This function prunes all
  * exceptionals from @pvec without leaving holes, so that it can be
  * passed on to page-only pagevec operations.
  */
diff --git a/mm/truncate.c b/mm/truncate.c
index bbd0a02eaed7..d62aeffbffcc 100644
--- a/mm/truncate.c
+++ b/mm/truncate.c
@@ -376,7 +376,7 @@ void truncate_inode_pages_range(struct address_space *mapping,
 	index = start;
 	for ( ; ; ) {
 		cond_resched();
-		if (!pagevec_lookup_entries(&pvec, mapping, index, end - 1,
+		if (!find_get_entries(mapping, index, end - 1, &pvec,
 				indices)) {
 			/* If all gone from start onwards, we're done */
 			if (index == start)
@@ -611,7 +611,7 @@ int invalidate_inode_pages2_range(struct address_space *mapping,
 
 	pagevec_init(&pvec);
 	index = start;
-	while (pagevec_lookup_entries(&pvec, mapping, index, end, indices)) {
+	while (find_get_entries(mapping, index, end, &pvec, indices)) {
 		for (i = 0; i < pagevec_count(&pvec); i++) {
 			struct page *page = pvec.pages[i];
 
-- 
2.28.0