mm: Convert __do_page_cache_readahead to XArray

This one is trivial.

Signed-off-by: Matthew Wilcox <willy@infradead.org>

diff --git a/mm/readahead.c b/mm/readahead.c
index fc4dd364b37a67646845b235dec9240c6731cc20..f3d6f9656a3cc83c93420210dd938b8d0b54648e 100644 (file)
--- a/mm/readahead.c
+++ b/mm/readahead.c
@@ -176,9 +176,7 @@ unsigned int __do_page_cache_readahead(struct address_space *mapping,
                if (page_offset > end_index)
                        break;
 
-               rcu_read_lock();
-               page = radix_tree_lookup(&mapping->i_pages, page_offset);
-               rcu_read_unlock();
+               page = xa_load(&mapping->i_pages, page_offset);
                if (page && !xa_is_value(page)) {
                        /*
                         * Page already present?  Kick off the current batch of