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-rw-r--r--include/linux/slub_def.h8
1 files changed, 6 insertions, 2 deletions
diff --git a/include/linux/slub_def.h b/include/linux/slub_def.h
index 30b154ce728..f8e0c86c48a 100644
--- a/include/linux/slub_def.h
+++ b/include/linux/slub_def.h
@@ -80,8 +80,12 @@ extern struct kmem_cache kmalloc_caches[KMALLOC_SHIFT_HIGH + 1];
*/
static inline int kmalloc_index(int size)
{
- if (size == 0)
- return 0;
+ /*
+ * We should return 0 if size == 0 but we use the smallest object
+ * here for SLAB legacy reasons.
+ */
+ WARN_ON_ONCE(size == 0);
+
if (size > 64 && size <= 96)
return 1;
if (size > 128 && size <= 192)