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mm/slub: fix MAX_ORDER usage in calculate_order()

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MAX_ORDER is not inclusive: the maximum allocation order buddy allocator
can deliver is MAX_ORDER-1.

Fix MAX_ORDER usage in calculate_order().

Link: https://lkml.kernel.org/r/20230315113133.11326-9-kirill.shutemov@linux.intel.com
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Kirill A. Shutemov 2023-03-15 14:31:31 +03:00 committed by Andrew Morton
parent 668a89907c
commit 7a16d7c761
1 changed files with 1 additions and 1 deletions
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2
mm/slub.c
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@ -4171,7 +4171,7 @@ static inline int calculate_order(unsigned int size)
/*
* Doh this slab cannot be placed using slub_max_order.
*/
order = calc_slab_order(size, 1, MAX_ORDER, 1);
order = calc_slab_order(size, 1, MAX_ORDER - 1, 1);
if (order < MAX_ORDER)
return order;
return -ENOSYS;