+ mm-slub-fix-max_order-usage-in-calculate_order.patch added to mm-unstable branch

+ mm-slub-fix-max_order-usage-in-calculate_order.patch added to mm-unstable branch

[Andrew Morton]

The patch titled
     Subject: mm/slub: fix MAX_ORDER usage in calculate_order()
has been added to the -mm mm-unstable branch.  Its filename is
     mm-slub-fix-max_order-usage-in-calculate_order.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-slub-fix-max_order-usage-in-calculate_order.patch

This patch will later appear in the mm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------
From: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Subject: mm/slub: fix MAX_ORDER usage in calculate_order()
Date: Wed, 15 Mar 2023 14:31:31 +0300

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>
---

 mm/slub.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/mm/slub.c~mm-slub-fix-max_order-usage-in-calculate_order
+++ a/mm/slub.c
@@ -4171,7 +4171,7 @@ static inline int calculate_order(unsign
 	/*
 	 * 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;
_

Patches currently in -mm which might be from kirill.shutemov@linux.intel.com are

sparc-mm-fix-max_order-usage-in-tsb_grow.patch
um-fix-max_order-usage-in-linux_main.patch
floppy-fix-max_order-usage.patch
drm-i915-fix-max_order-usage-in-i915_gem_object_get_pages_internal.patch
genwqe-fix-max_order-usage.patch
perf-core-fix-max_order-usage-in-rb_alloc_aux_page.patch
mm-page_reporting-fix-max_order-usage-in-page_reporting_register.patch
mm-slub-fix-max_order-usage-in-calculate_order.patch
iommu-fix-max_order-usage-in-__iommu_dma_alloc_pages.patch
mm-treewide-redefine-max_order-sanely.patch