[PATCH 3.18 055/120] slub: make ->cpu_partial unsigned int

Greg Kroah-Hartman
2018-10-11T15:38:13Z

From: Alexey Dobriyan <adobriyan@gmail.com>

commit e5d9998f3e09359b372a037a6ac55ba235d95d57 upstream.

/*
* cpu_partial determined the maximum number of objects
* kept in the per cpu partial lists of a processor.
*/

Can't be negative.

Link: http://lkml.kernel.org/r/20180305200730.15812-15-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>
Signed-off-by: zhong jiang <zhongjiang@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
include/linux/slub_def.h | 3 ++-
mm/slub.c | 6 +++---
2 files changed, 5 insertions(+), 4 deletions(-)

--- a/include/linux/slub_def.h
+++ b/include/linux/slub_def.h
@@ -67,7 +67,8 @@ struct kmem_cache {
int size; /* The size of an object including meta data */
int object_size; /* The size of an object without meta data */
int offset; /* Free pointer offset. */
- int cpu_partial; /* Number of per cpu partial objects to keep around */
+ /* Number of per cpu partial objects to keep around */
+ unsigned int cpu_partial;
struct kmem_cache_order_objects oo;

/* Allocation and freeing of slabs */
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -1577,7 +1577,7 @@ static void *get_partial_node(struct kme
{
struct page *page, *page2;
void *object = NULL;
- int available = 0;
+ unsigned int available = 0;
int objects;

/*
@@ -4366,10 +4366,10 @@ static ssize_t cpu_partial_show(struct k
static ssize_t cpu_partial_store(struct kmem_cache *s, const char *buf,
size_t length)
{
- unsigned long objects;
+ unsigned int objects;
int err;

- err = kstrtoul(buf, 10, &objects);
+ err = kstrtouint(buf, 10, &objects);
if (err)
return err;
if (objects && !kmem_cache_has_cpu_partial(s))