Commit 7a16d7c7 authored by Kirill A. Shutemov's avatar Kirill A. Shutemov Committed by Andrew Morton
Browse files

mm/slub: fix MAX_ORDER usage in calculate_order() 

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: default avatarKirill 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: default avatarAndrew Morton <akpm@linux-foundation.org>
parent 668a8990

mm/slub.c

+1 −1
Original line number Diff line number Diff line
@@ -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;