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slab: make kmalloc_size() return "unsigned int" 

kmalloc_size() derives size of kmalloc cache from internal index, which
can't be negative.

Propagate unsignedness a bit.

Link: http://lkml.kernel.org/r/20180305200730.15812-3-adobriyan@gmail.com
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Acked-by: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Alexey Dobriyan 2018-04-05 16:20:26 -07:00 committed by Linus Torvalds
parent 36071a279b
commit 0be70327ec
2 changed files with 4 additions and 4 deletions
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4
include/linux/slab.h
View File

@ -522,11 +522,11 @@ static __always_inline void *kmalloc(size_t size, gfp_t flags)
* return size or 0 if a kmalloc cache for that
* size does not exist
*/
static __always_inline int kmalloc_size(int n)
static __always_inline unsigned int kmalloc_size(unsigned int n)
{
#ifndef CONFIG_SLOB
if (n > 2)
return 1 << n;
return 1U << n;
if (n == 1 && KMALLOC_MIN_SIZE <= 32)
return 96;

4
mm/slab_common.c
View File

@ -1138,9 +1138,9 @@ void __init create_kmalloc_caches(slab_flags_t flags)
struct kmem_cache *s = kmalloc_caches[i];
if (s) {
int size = kmalloc_size(i);
unsigned int size = kmalloc_size(i);
char *n = kasprintf(GFP_NOWAIT,
"dma-kmalloc-%d", size);
"dma-kmalloc-%u", size);
BUG_ON(!n);
kmalloc_dma_caches[i] = create_kmalloc_cache(n,