shmem: Convert shmem_confirm_swap to XArray
xa_load has its own RCU locking, so we can eliminate it here.
Signed-off-by: Matthew Wilcox <willy@infradead.org>
diff --git a/mm/shmem.c b/mm/shmem.c
index 5697c8f..ce91569 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -349,12 +349,7 @@ static int shmem_replace_entry(struct address_space *mapping,
static bool shmem_confirm_swap(struct address_space *mapping,
pgoff_t index, swp_entry_t swap)
{
- void *item;
-
- rcu_read_lock();
- item = radix_tree_lookup(&mapping->i_pages, index);
- rcu_read_unlock();
- return item == swp_to_radix_entry(swap);
+ return xa_load(&mapping->i_pages, index) == swp_to_radix_entry(swap);
}
/*