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From:   Matthew Wilcox <willy@infradead.org>
To:     Andrew Morton <akpm@linux-foundation.org>
Cc:     Matthew Wilcox <mawilcox@microsoft.com>,
        linux-kernel@vger.kernel.org, linux-mm@kvack.org,
        linux-fsdevel@vger.kernel.org
Subject: [PATCH v7 38/61] mm: Convert __do_page_cache_readahead to XArray
Date:   Mon, 19 Feb 2018 11:45:33 -0800
Message-Id: <20180219194556.6575-39-willy@infradead.org>
In-Reply-To: <20180219194556.6575-1-willy@infradead.org>
References: <20180219194556.6575-1-willy@infradead.org>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

From: Matthew Wilcox <mawilcox@microsoft.com>

This one is trivial.

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

diff --git a/mm/readahead.c b/mm/readahead.c
index f64b31b3a84a..66bcaffd47f0 100644
--- a/mm/readahead.c
+++ b/mm/readahead.c
@@ -174,9 +174,7 @@ int __do_page_cache_readahead(struct address_space *mapping, struct file *filp,
 		if (page_offset > end_index)
 			break;
 
-		rcu_read_lock();
-		page = radix_tree_lookup(&mapping->pages, page_offset);
-		rcu_read_unlock();
+		page = xa_load(&mapping->pages, page_offset);
 		if (page && !xa_is_value(page))
 			continue;
 
-- 
2.16.1