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Diffstat (limited to 'mm/shmem.c')
-rw-r--r--mm/shmem.c38
1 files changed, 1 insertions, 37 deletions
diff --git a/mm/shmem.c b/mm/shmem.c
index 3a5be0feb6a..1c702f6f124 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -357,42 +357,6 @@ export:
}
/*
- * Lockless lookup of swap entry in radix tree, avoiding refcount on pages.
- */
-static pgoff_t shmem_find_swap(struct address_space *mapping, void *radswap)
-{
- void **slots[PAGEVEC_SIZE];
- pgoff_t indices[PAGEVEC_SIZE];
- unsigned int nr_found;
-
-restart:
- nr_found = 1;
- indices[0] = -1;
- while (nr_found) {
- pgoff_t index = indices[nr_found - 1] + 1;
- unsigned int i;
-
- rcu_read_lock();
- nr_found = radix_tree_gang_lookup_slot(&mapping->page_tree,
- slots, indices, index, PAGEVEC_SIZE);
- for (i = 0; i < nr_found; i++) {
- void *item = radix_tree_deref_slot(slots[i]);
- if (radix_tree_deref_retry(item)) {
- rcu_read_unlock();
- goto restart;
- }
- if (item == radswap) {
- rcu_read_unlock();
- return indices[i];
- }
- }
- rcu_read_unlock();
- cond_resched();
- }
- return -1;
-}
-
-/*
* Remove swap entry from radix tree, free the swap and its page cache.
*/
static int shmem_free_swap(struct address_space *mapping,
@@ -612,7 +576,7 @@ static int shmem_unuse_inode(struct shmem_inode_info *info,
int error;
radswap = swp_to_radix_entry(swap);
- index = shmem_find_swap(mapping, radswap);
+ index = radix_tree_locate_item(&mapping->page_tree, radswap);
if (index == -1)
return 0;