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-rw-r--r--mm/workingset.c20
1 files changed, 12 insertions, 8 deletions
diff --git a/mm/workingset.c b/mm/workingset.c
index fb1f9183d89a..98f830897b1b 100644
--- a/mm/workingset.c
+++ b/mm/workingset.c
@@ -418,23 +418,27 @@ static enum lru_status shadow_lru_isolate(struct list_head *item,
* no pages, so we expect to be able to remove them all and
* delete and free the empty node afterwards.
*/
- BUG_ON(!workingset_node_shadows(node));
- BUG_ON(workingset_node_pages(node));
-
+ if (WARN_ON_ONCE(!workingset_node_shadows(node)))
+ goto out_invalid;
+ if (WARN_ON_ONCE(workingset_node_pages(node)))
+ goto out_invalid;
for (i = 0; i < RADIX_TREE_MAP_SIZE; i++) {
if (node->slots[i]) {
- BUG_ON(!radix_tree_exceptional_entry(node->slots[i]));
+ if (WARN_ON_ONCE(!radix_tree_exceptional_entry(node->slots[i])))
+ goto out_invalid;
+ if (WARN_ON_ONCE(!mapping->nrexceptional))
+ goto out_invalid;
node->slots[i] = NULL;
workingset_node_shadows_dec(node);
- BUG_ON(!mapping->nrexceptional);
mapping->nrexceptional--;
}
}
- BUG_ON(workingset_node_shadows(node));
+ if (WARN_ON_ONCE(workingset_node_shadows(node)))
+ goto out_invalid;
inc_node_state(page_pgdat(virt_to_page(node)), WORKINGSET_NODERECLAIM);
- if (!__radix_tree_delete_node(&mapping->page_tree, node))
- BUG();
+ __radix_tree_delete_node(&mapping->page_tree, node);
+out_invalid:
spin_unlock(&mapping->tree_lock);
ret = LRU_REMOVED_RETRY;
out: