mm: Convert __do_page_cache_readahead to XArray

This one is trivial. Signed-off-by: Matthew Wilcox <willy@infradead.org>

mm: Convert __do_page_cache_readahead to XArray
This one is trivial. Signed-off-by: Matthew Wilcox <willy@infradead.org>
560d454b · Matthew Wilcox · 4e17ec25 · 560d454b
Commit 560d454b authored Dec 04, 2017 by Matthew Wilcox
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mm/readahead.c mm/readahead.c +1 -3

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--- 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 = xa_load(&mapping->i_pages, page_offset);
-		page = radix_tree_lookup(&mapping->i_pages, page_offset);
-		rcu_read_unlock();
 		if (page && !xa_is_value(page)) {
 			/*
 			 * Page already present?  Kick off the current batch of