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| author | Alexey Dobriyan <adobriyan@gmail.com> | 2018-04-06 02:20:37 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-04-06 07:36:23 +0300 |
| commit | f4957d5bd09165b165df851fbf8c658f7fcd9922 (patch) | |
| tree | 021c72366564d4082e2885999640b79d174e5296 /mm/slab.h | |
| parent | 361d575e5c7a39c73a8a9bdd504c1d1274f280aa (diff) | |
| download | linux-f4957d5bd09165b165df851fbf8c658f7fcd9922.tar.xz | |
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 'mm/slab.h')
| -rw-r--r-- | mm/slab.h | 6 |
1 files changed, 3 insertions, 3 deletions
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; } |