All those small numbers are reverse indexes into kmalloc caches array
and can't be negative.
On x86_64 "unsigned int = fls()" can drop CDQE:
add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-2 (-2)
Function old new delta
kmalloc_slab 101 99 -2
Signed-off-by: Alexey Dobriyan <adobriyan@xxxxxxxxx>
---
mm/slab_common.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/mm/slab_common.c b/mm/slab_common.c
index 1d46602c881e..4405af3ee8eb 100644
--- a/mm/slab_common.c
+++ b/mm/slab_common.c
@@ -927,7 +927,7 @@ EXPORT_SYMBOL(kmalloc_dma_caches);
* of two cache sizes there. The size of larger slabs can be determined using
* fls.
*/
-static s8 size_index[24] = {
+static u8 size_index[24] = {
3, /* 8 */
4, /* 16 */
5, /* 24 */
@@ -965,7 +965,7 @@ static inline int size_index_elem(size_t bytes)
*/
struct kmem_cache *kmalloc_slab(size_t size, gfp_t flags)
{
- int index;
+ unsigned int index;
if (unlikely(size > KMALLOC_MAX_SIZE)) {
WARN_ON_ONCE(!(flags & __GFP_NOWARN));
--
2.13.6
--
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