kern: silence compiler warning about uninitialized variable

* kern/slab.c (kmem_cache_compute_sizes): Initialize optimal_size and
assert that a size is selected.

1 files changed, 2 insertions, 1 deletions

diff --git a/kern/slab.c b/kern/slab.c
index e8451a8a..19ebfedb 100644
--- a/kern/slab.c
+++ b/kern/slab.c
@@ -702,7 +702,7 @@ static void kmem_cache_error(struct kmem_cache *cache, void *buf, int error,
  */
 static void kmem_cache_compute_sizes(struct kmem_cache *cache, int flags)
 {
-    size_t i, buffers, buf_size, slab_size, free_slab_size, optimal_size;
+    size_t i, buffers, buf_size, slab_size, free_slab_size, optimal_size = 0;
     size_t waste, waste_min;
     int embed, optimal_embed = 0;
 
@@ -745,6 +745,7 @@ static void kmem_cache_compute_sizes(struct kmem_cache *cache, int flags)
     } while ((buffers < KMEM_MIN_BUFS_PER_SLAB)
              && (slab_size < KMEM_SLAB_SIZE_THRESHOLD));
 
+    assert(optimal_size > 0);
     assert(!(flags & KMEM_CACHE_NOOFFSLAB) || optimal_embed);
 
     cache->slab_size = optimal_size;