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memblock: Make a boundary tighter in memblock_add_range().

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When type->cnt * 2 + 1 is less than or equal to type->max, there is
enough empty regions to insert.

Signed-off-by: Peng Zhang <zhangpeng.00@bytedance.com>
Link: https://lore.kernel.org/r/20230129090034.12310-2-zhangpeng.00@bytedance.com
Signed-off-by: Mike Rapoport (IBM) <rppt@kernel.org>
This commit is contained in:
Peng Zhang
2023-01-29 17:00:33 +08:00
committed by Mike Rapoport (IBM)
parent 6d796c50f8
commit ad500fb2d1
1 changed files with 2 additions and 2 deletions
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4
mm/memblock.c
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@@ -601,11 +601,11 @@ static int __init_memblock memblock_add_range(struct memblock_type *type,
/* /*
* The worst case is when new range overlaps all existing regions, * The worst case is when new range overlaps all existing regions,
* then we'll need type->cnt + 1 empty regions in @type. So if * then we'll need type->cnt + 1 empty regions in @type. So if
* type->cnt * 2 + 1 is less than type->max, we know * type->cnt * 2 + 1 is less than or equal to type->max, we know
* that there is enough empty regions in @type, and we can insert * that there is enough empty regions in @type, and we can insert
* regions directly. * regions directly.
*/ */
if (type->cnt * 2 + 1 < type->max) if (type->cnt * 2 + 1 <= type->max)
insert = true; insert = true;
repeat: repeat: