slab: make kmem_cache_create() work with 32-bit sizes
authorAlexey Dobriyan <adobriyan@gmail.com>
Thu, 5 Apr 2018 23:20:37 +0000 (16:20 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Fri, 6 Apr 2018 04:36:23 +0000 (21:36 -0700)
commitf4957d5bd09165b165df851fbf8c658f7fcd9922
tree021c72366564d4082e2885999640b79d174e5296
parent361d575e5c7a39c73a8a9bdd504c1d1274f280aa
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>
include/linux/slab.h
mm/slab.c
mm/slab.h
mm/slab_common.c
mm/slub.c