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authorAlexey Dobriyan <adobriyan@gmail.com>2018-04-05 16:20:37 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2018-04-05 21:36:23 -0700
commitf4957d5bd09165b165df851fbf8c658f7fcd9922 (patch)
tree021c72366564d4082e2885999640b79d174e5296 /include
parent361d575e5c7a39c73a8a9bdd504c1d1274f280aa (diff)
slab: make kmem_cache_create() work with 32-bit sizes
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. Link: http://lkml.kernel.org/r/20180305200730.15812-6-adobriyan@gmail.com Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Cc: 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>
Diffstat (limited to 'include')
-rw-r--r--include/linux/slab.h7
1 files changed, 4 insertions, 3 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 *);