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>

diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h
index 112f15b..9ec3544 100644 (file)
--- 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 3ad18fa..c5af80c 100644 (file)
--- 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: