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From: Matthew Wilcox <willy@infradead.org>
To: linux-mm@kvack.org,
	linux-fsdevel@vger.kernel.org
Cc: Matthew Wilcox <mawilcox@microsoft.com>,
	Jan Kara <jack@suse.cz>,
	Jeff Layton <jlayton@redhat.com>,
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	Ross Zwisler <ross.zwisler@linux.intel.com>,
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	Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>,
	linux-nilfs@vger.kernel.org,
	Jaegeuk Kim <jaegeuk@kernel.org>,
	Chao Yu <yuchao0@huawei.com>,
	linux-f2fs-devel@lists.sourceforge.net,
	Oleg Drokin <oleg.drokin@intel.com>,
	Andreas Dilger <andreas.dilger@intel.com>,
	James Simmons <jsimmons@infradead.org>,
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Subject: [PATCH v11 29/63] mm: Convert __do_page_cache_readahead to XArray
Date: Sat, 14 Apr 2018 07:12:42 -0700
Message-Id: <20180414141316.7167-30-willy@infradead.org>
In-Reply-To: <20180414141316.7167-1-willy@infradead.org>
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Sender: owner-linux-mm@kvack.org
List-ID: <linux-fsdevel.vger.kernel.org>

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 c7ddcf60ac6d..50910c27b372 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->i_pages, page_offset);
-		rcu_read_unlock();
+		page = xa_load(&mapping->i_pages, page_offset);
 		if (page && !xa_is_value(page))
 			continue;
 
-- 
2.17.0