+ mm-treewide-redefine-max_order-sanely-fix-3.patch added to mm-unstable branch

+ mm-treewide-redefine-max_order-sanely-fix-3.patch added to mm-unstable branch

[Andrew Morton]

The patch titled
     Subject: mm-treewide-redefine-max_order-sanely-fix-3
has been added to the -mm mm-unstable branch.  Its filename is
     mm-treewide-redefine-max_order-sanely-fix-3.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-treewide-redefine-max_order-sanely-fix-3.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.name>
Subject: mm-treewide-redefine-max_order-sanely-fix-3
Date: Fri, 17 Mar 2023 02:21:44 +0300

fixups per Zi Yan

Link: https://lkml.kernel.org/r/20230316232144.b7ic4cif4kjiabws@box.shutemov.name
Signed-off-by: "Kirill A. Shutemov" <kirill@shutemov.name>
Cc: Zi Yan <ziy@nvidia.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---


--- a/Documentation/admin-guide/kdump/vmcoreinfo.rst~mm-treewide-redefine-max_order-sanely-fix-3
+++ a/Documentation/admin-guide/kdump/vmcoreinfo.rst
@@ -189,7 +189,7 @@ Offsets of the vmap_area's members. They
 information. Makedumpfile gets the start address of the vmalloc region
 from this.
 
-(zone.free_area, MAX_ORDER)
+(zone.free_area, MAX_ORDER + 1)
 ---------------------------
 
 Free areas descriptor. User-space tools use this value to iterate the
--- a/kernel/events/ring_buffer.c~mm-treewide-redefine-max_order-sanely-fix-3
+++ a/kernel/events/ring_buffer.c
@@ -814,7 +814,7 @@ struct perf_buffer *rb_alloc(int nr_page
 	size = sizeof(struct perf_buffer);
 	size += nr_pages * sizeof(void *);
 
-	if (order_base_2(size) >= PAGE_SHIFT+MAX_ORDER)
+	if (order_base_2(size) > PAGE_SHIFT+MAX_ORDER)
 		goto fail;
 
 	node = (cpu == -1) ? cpu : cpu_to_node(cpu);
--- a/mm/Kconfig~mm-treewide-redefine-max_order-sanely-fix-3
+++ a/mm/Kconfig
@@ -666,8 +666,8 @@ config HUGETLB_PAGE_SIZE_VARIABLE
 	  HUGETLB_PAGE_ORDER when there are multiple HugeTLB page sizes available
 	  on a platform.
 
-	  Note that the pageblock_order cannot exceed MAX_ORDER - 1 and will be
-	  clamped down to MAX_ORDER - 1.
+	  Note that the pageblock_order cannot exceed MAX_ORDER and will be
+	  clamped down to MAX_ORDER.
 
 config CONTIG_ALLOC
 	def_bool (MEMORY_ISOLATION && COMPACTION) || CMA
--- a/mm/slub.c~mm-treewide-redefine-max_order-sanely-fix-3
+++ a/mm/slub.c
@@ -4697,7 +4697,7 @@ __setup("slub_min_order=", setup_slub_mi
 static int __init setup_slub_max_order(char *str)
 {
 	get_option(&str, (int *)&slub_max_order);
-	slub_max_order = min(slub_max_order, (unsigned int)MAX_ORDER);
+	slub_max_order = min_t(unsigned int, slub_max_order, MAX_ORDER);
 
 	return 1;
 }
_

Patches currently in -mm which might be from kirill@shutemov.name are

mm-treewide-redefine-max_order-sanely-fix.patch
mm-treewide-redefine-max_order-sanely-fix-3.patch