+ lib-test_meminit-allocate-pages-up-to-order-max_order.patch added to mm-unstable branch

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The patch titled
     Subject: lib/test_meminit: allocate pages up to order MAX_ORDER
has been added to the -mm mm-unstable branch.  Its filename is
     lib-test_meminit-allocate-pages-up-to-order-max_order.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/lib-test_meminit-allocate-pages-up-to-order-max_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: Andrew Donnellan <ajd@xxxxxxxxxxxxx>
Subject: lib/test_meminit: allocate pages up to order MAX_ORDER
Date: Fri, 14 Jul 2023 11:52:38 +1000

test_pages() tests the page allocator by calling alloc_pages() with
different orders up to order 10.

However, different architectures and platforms support different maximum
contiguous allocation sizes.  The default maximum allocation order
(MAX_ORDER) is 10, but architectures can use CONFIG_ARCH_FORCE_MAX_ORDER
to override this.  On platforms where this is less than 10, test_meminit()
will blow up with a WARN().  This is expected, so let's not do that.

Replace the hardcoded "10" with the MAX_ORDER macro so that we test
allocations up to the expected platform limit.

Link: https://lkml.kernel.org/r/20230714015238.47931-1-ajd@xxxxxxxxxxxxx
Fixes: 5015a300a522 ("lib: introduce test_meminit module")
Signed-off-by: Andrew Donnellan <ajd@xxxxxxxxxxxxx>
Reviewed-by: Alexander Potapenko <glider@xxxxxxxxxx>
Cc: Xiaoke Wang <xkernel.wang@xxxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---

 lib/test_meminit.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/lib/test_meminit.c~lib-test_meminit-allocate-pages-up-to-order-max_order
+++ a/lib/test_meminit.c
@@ -93,7 +93,7 @@ static int __init test_pages(int *total_
 	int failures = 0, num_tests = 0;
 	int i;
 
-	for (i = 0; i < 10; i++)
+	for (i = 0; i <= MAX_ORDER; i++)
 		num_tests += do_alloc_pages_order(i, &failures);
 
 	REPORT_FAILURES_IN_FN();
_

Patches currently in -mm which might be from ajd@xxxxxxxxxxxxx are

lib-test_meminit-allocate-pages-up-to-order-max_order.patch




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