[v4,35/73] mm: Convert __do_page_cache_readahead to XArray

Commit Message

Matthew Wilcox (Oracle) Dec. 6, 2017, 12:41 a.m. UTC

From: Matthew Wilcox <[e-mail]>

This one is trivial.

Signed-off-by: Matthew Wilcox <[e-mail]>
---
 mm/readahead.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

Patch

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;