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[v13,39/72] mm: Convert __do_page_cache_readahead to XArray

Message ID 20180611140639.17215-40-willy@infradead.org (mailing list archive)
State New, archived
Headers show

Commit Message

Matthew Wilcox June 11, 2018, 2:06 p.m. UTC 
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(-)
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Patch

diff --git a/mm/readahead.c b/mm/readahead.c
index 59998ca31f2a..07f9734dc79f 100644
--- a/mm/readahead.c
+++ b/mm/readahead.c
@@ -174,9 +174,7 @@  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