slab: make kmem_cache_create() work with 32-bit sizes

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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>

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Alexey Dobriyan 2018-04-05 16:20:37 -07:00 • committed by Linus Torvalds

parent 361d575e5c

commit f4957d5bd0

5 changed files with 19 additions and 17 deletions

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7

include/linux/slab.h

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2

mm/slab.c

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6

mm/slab.h

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19

mm/slab_common.c

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2

mm/slub.c

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