mm: delete find_get_entries_tag

I removed the only user of this and hadn't noticed it was now unused.

Link: http://lkml.kernel.org/r/20190430152929.21813-1-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Ross Zwisler <zwisler@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2 files changed, 0 insertions, 64 deletions

diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h
index 112f15bb5907..9ec3544baee2 100644
--- a/include/linux/pagemap.h
+++ b/include/linux/pagemap.h
@@ -373,9 +373,6 @@ static inline unsigned find_get_pages_tag(struct address_space *mapping,
         return find_get_pages_range_tag(mapping, index, (pgoff_t)-1, tag,
                                         nr_pages, pages);
 }
-unsigned find_get_entries_tag(struct address_space *mapping, pgoff_t start,
-                        xa_mark_t tag, unsigned int nr_entries,
-                        struct page **entries, pgoff_t *indices);
 
 struct page *grab_cache_page_write_begin(struct address_space *mapping,
                         pgoff_t index, unsigned flags);
diff --git a/mm/filemap.c b/mm/filemap.c
index 3ad18fa56057..c5af80c43d36 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -1941,67 +1941,6 @@ out:
 }
 EXPORT_SYMBOL(find_get_pages_range_tag);
 
-/**
- * find_get_entries_tag - find and return entries that match @tag
- * @mapping:    the address_space to search
- * @start:      the starting page cache index
- * @tag:        the tag index
- * @nr_entries: the maximum number of entries
- * @entries:    where the resulting entries are placed
- * @indices:    the cache indices corresponding to the entries in @entries
- *
- * Like find_get_entries, except we only return entries which are tagged with
- * @tag.
- *
- * Return: the number of entries which were found.
- */
-unsigned find_get_entries_tag(struct address_space *mapping, pgoff_t start,
-                        xa_mark_t tag, unsigned int nr_entries,
-                        struct page **entries, pgoff_t *indices)
-{
-        XA_STATE(xas, &mapping->i_pages, start);
-        struct page *page;
-        unsigned int ret = 0;
-
-        if (!nr_entries)
-                return 0;
-
-        rcu_read_lock();
-        xas_for_each_marked(&xas, page, ULONG_MAX, tag) {
-                if (xas_retry(&xas, page))
-                        continue;
-                /*
-                 * A shadow entry of a recently evicted page, a swap
-                 * entry from shmem/tmpfs or a DAX entry.  Return it
-                 * without attempting to raise page count.
-                 */
-                if (xa_is_value(page))
-                        goto export;
-
-                if (!page_cache_get_speculative(page))
-                        goto retry;
-
-                /* Has the page moved or been split? */
-                if (unlikely(page != xas_reload(&xas)))
-                        goto put_page;
-                page = find_subpage(page, xas.xa_index);
-
-export:
-                indices[ret] = xas.xa_index;
-                entries[ret] = page;
-                if (++ret == nr_entries)
-                        break;
-                continue;
-put_page:
-                put_page(page);
-retry:
-                xas_reset(&xas);
-        }
-        rcu_read_unlock();
-        return ret;
-}
-EXPORT_SYMBOL(find_get_entries_tag);
-
 /*
  * CD/DVDs are error prone. When a medium error occurs, the driver may fail
  * a _large_ part of the i/o request. Imagine the worst scenario: