From: Matthew Wilcox <willy@infradead.org>
Date: Mon, 4 Dec 2017 09:30:18 +0000 (-0500)
Subject: mm: Convert __do_page_cache_readahead to XArray
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=560d454bae08b5d5a132c5520177dede066334b7;p=linux.git

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 fc4dd364b37a6..f3d6f9656a3cc 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