From 560d454bae08b5d5a132c5520177dede066334b7 Mon Sep 17 00:00:00 2001
From: Matthew Wilcox <willy@infradead.org>
Date: Mon, 4 Dec 2017 04:30:18 -0500
Subject: [PATCH] mm: Convert __do_page_cache_readahead to XArray

This one is trivial.

Signed-off-by: Matthew Wilcox <willy@infradead.org>
---
 mm/readahead.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/mm/readahead.c b/mm/readahead.c
index fc4dd364b37a..f3d6f9656a3c 100644
--- 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
-- 
GitLab