struct kmem_cache::size and ::align were always 32-bit.
Out of curiosity I created 4GB kmem_cache, it oopsed with division by 0.
kmem_cache_create(1UL<<32+1) created 1-byte cache as expected.
size_t doesn't work and never did.
Signed-off-by: Alexey Dobriyan <adobriyan@xxxxxxxxx>
---
include/linux/slab.h | 7 ++++---
mm/slab.c | 2 +-
mm/slab.h | 6 +++---
mm/slab_common.c | 19 ++++++++++---------
mm/slub.c | 2 +-
5 files changed, 19 insertions(+), 17 deletions(-)
diff --git a/include/linux/slab.h b/include/linux/slab.h
index ad157fbf3886..d36e8f03730e 100644
--- a/include/linux/slab.h
+++ b/include/linux/slab.h
@@ -137,11 +137,12 @@ bool slab_is_available(void);
extern bool usercopy_fallback;
-struct kmem_cache *kmem_cache_create(const char *name, size_t size,
- size_t align, slab_flags_t flags,
+struct kmem_cache *kmem_cache_create(const char *name, unsigned int size,
+ unsigned int align, slab_flags_t flags,
void (*ctor)(void *));
struct kmem_cache *kmem_cache_create_usercopy(const char *name,
- size_t size, size_t align, slab_flags_t flags,
+ unsigned int size, unsigned int align,
+ slab_flags_t flags,
size_t useroffset, size_t usersize,
void (*ctor)(void *));
void kmem_cache_destroy(struct kmem_cache *);
diff --git a/mm/slab.c b/mm/slab.c
index 324446621b3e..cc136fcedfb9 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -1876,7 +1876,7 @@ slab_flags_t kmem_cache_flags(unsigned long object_size,
}
struct kmem_cache *
-__kmem_cache_alias(const char *name, size_t size, size_t align,
+__kmem_cache_alias(const char *name, unsigned int size, unsigned int align,
slab_flags_t flags, void (*ctor)(void *))
{
struct kmem_cache *cachep;
diff --git a/mm/slab.h b/mm/slab.h
index 2a6d88044a56..0809580428fe 100644
--- a/mm/slab.h
+++ b/mm/slab.h
@@ -101,11 +101,11 @@ extern void create_boot_cache(struct kmem_cache *, const char *name,
unsigned int useroffset, unsigned int usersize);
int slab_unmergeable(struct kmem_cache *s);
-struct kmem_cache *find_mergeable(size_t size, size_t align,
+struct kmem_cache *find_mergeable(unsigned size, unsigned align,
slab_flags_t flags, const char *name, void (*ctor)(void *));
#ifndef CONFIG_SLOB
struct kmem_cache *
-__kmem_cache_alias(const char *name, size_t size, size_t align,
+__kmem_cache_alias(const char *name, unsigned int size, unsigned int align,
slab_flags_t flags, void (*ctor)(void *));
slab_flags_t kmem_cache_flags(unsigned long object_size,
@@ -113,7 +113,7 @@ slab_flags_t kmem_cache_flags(unsigned long object_size,
void (*ctor)(void *));
#else
static inline struct kmem_cache *
-__kmem_cache_alias(const char *name, size_t size, size_t align,
+__kmem_cache_alias(const char *name, unsigned int size, unsigned int align,
slab_flags_t flags, void (*ctor)(void *))
{ return NULL; }
diff --git a/mm/slab_common.c b/mm/slab_common.c
index 2a7f09ce7c84..a4545a61a7c8 100644
--- a/mm/slab_common.c
+++ b/mm/slab_common.c
@@ -82,7 +82,7 @@ unsigned int kmem_cache_size(struct kmem_cache *s)
EXPORT_SYMBOL(kmem_cache_size);
#ifdef CONFIG_DEBUG_VM
-static int kmem_cache_sanity_check(const char *name, size_t size)
+static int kmem_cache_sanity_check(const char *name, unsigned int size)
{
struct kmem_cache *s = NULL;
@@ -113,7 +113,7 @@ static int kmem_cache_sanity_check(const char *name, size_t size)
return 0;
}
#else
-static inline int kmem_cache_sanity_check(const char *name, size_t size)
+static inline int kmem_cache_sanity_check(const char *name, unsigned int size)
{
return 0;
}
@@ -280,8 +280,8 @@ static inline void memcg_unlink_cache(struct kmem_cache *s)
* Figure out what the alignment of the objects will be given a set of
* flags, a user specified alignment and the size of the objects.
*/
-static unsigned long calculate_alignment(slab_flags_t flags,
- unsigned long align, unsigned long size)
+static unsigned int calculate_alignment(slab_flags_t flags,
+ unsigned int align, unsigned int size)
{
/*
* If the user wants hardware cache aligned objects then follow that
@@ -291,7 +291,7 @@ static unsigned long calculate_alignment(slab_flags_t flags,
* alignment though. If that is greater then use it.
*/
if (flags & SLAB_HWCACHE_ALIGN) {
- unsigned long ralign;
+ unsigned int ralign;
ralign = cache_line_size();
while (size <= ralign / 2)
@@ -331,7 +331,7 @@ int slab_unmergeable(struct kmem_cache *s)
return 0;
}
-struct kmem_cache *find_mergeable(size_t size, size_t align,
+struct kmem_cache *find_mergeable(unsigned int size, unsigned int align,
slab_flags_t flags, const char *name, void (*ctor)(void *))
{
struct kmem_cache *s;
@@ -379,7 +379,7 @@ struct kmem_cache *find_mergeable(size_t size, size_t align,
}
static struct kmem_cache *create_cache(const char *name,
- size_t object_size, size_t size, size_t align,
+ unsigned int object_size, unsigned int size, unsigned int align,
slab_flags_t flags, size_t useroffset,
size_t usersize, void (*ctor)(void *),
struct mem_cgroup *memcg, struct kmem_cache *root_cache)
@@ -452,7 +452,8 @@ static struct kmem_cache *create_cache(const char *name,
* as davem.
*/
struct kmem_cache *
-kmem_cache_create_usercopy(const char *name, size_t size, size_t align,
+kmem_cache_create_usercopy(const char *name,
+ unsigned int size, unsigned int align,
slab_flags_t flags, size_t useroffset, size_t usersize,
void (*ctor)(void *))
{
@@ -532,7 +533,7 @@ kmem_cache_create_usercopy(const char *name, size_t size, size_t align,
EXPORT_SYMBOL(kmem_cache_create_usercopy);
struct kmem_cache *
-kmem_cache_create(const char *name, size_t size, size_t align,
+kmem_cache_create(const char *name, unsigned int size, unsigned int align,
slab_flags_t flags, void (*ctor)(void *))
{
return kmem_cache_create_usercopy(name, size, align, flags, 0, 0,
diff --git a/mm/slub.c b/mm/slub.c
index e381728a3751..b2f529a33400 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -4241,7 +4241,7 @@ void __init kmem_cache_init_late(void)
}
struct kmem_cache *
-__kmem_cache_alias(const char *name, size_t size, size_t align,
+__kmem_cache_alias(const char *name, unsigned int size, unsigned int align,
slab_flags_t flags, void (*ctor)(void *))
{
struct kmem_cache *s, *c;
--
2.16.1
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