+ khugepaged-selftests-remove-debug_cow.patch added to -mm tree

+ khugepaged-selftests-remove-debug_cow.patch added to -mm tree

[akpm]

The patch titled
     Subject: khugepaged: selftests: remove debug_cow
has been added to the -mm tree.  Its filename is
     khugepaged-selftests-remove-debug_cow.patch

This patch should soon appear at
    https://ozlabs.org/~akpm/mmots/broken-out/khugepaged-selftests-remove-debug_cow.patch
and later at
    https://ozlabs.org/~akpm/mmotm/broken-out/khugepaged-selftests-remove-debug_cow.patch

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------------------------------------------------------
From: Nanyong Sun <sunnanyong@huawei.com>
Subject: khugepaged: selftests: remove debug_cow

The debug_cow attribute had been removed since commit 4958e4d86ecb01 ("mm:
thp: remove debug_cow switch"), so remove it in selftest code too,
otherwise the khugepaged test will fail.

Link: https://lkml.kernel.org/r/20210430051117.400189-1-sunnanyong@huawei.com
Fixes: 4958e4d86ecb01 ("mm: thp: remove debug_cow switch")
Signed-off-by: Nanyong Sun <sunnanyong@huawei.com>
Cc: Yang Shi <yang.shi@linux.alibaba.com>
Cc: Zi Yan <ziy@nvidia.com>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 tools/testing/selftests/vm/khugepaged.c |    4 ----
 1 file changed, 4 deletions(-)

--- a/tools/testing/selftests/vm/khugepaged.c~khugepaged-selftests-remove-debug_cow
+++ a/tools/testing/selftests/vm/khugepaged.c
@@ -86,7 +86,6 @@ struct settings {
 	enum thp_enabled thp_enabled;
 	enum thp_defrag thp_defrag;
 	enum shmem_enabled shmem_enabled;
-	bool debug_cow;
 	bool use_zero_page;
 	struct khugepaged_settings khugepaged;
 };
@@ -95,7 +94,6 @@ static struct settings default_settings
 	.thp_enabled = THP_MADVISE,
 	.thp_defrag = THP_DEFRAG_ALWAYS,
 	.shmem_enabled = SHMEM_NEVER,
-	.debug_cow = 0,
 	.use_zero_page = 0,
 	.khugepaged = {
 		.defrag = 1,
@@ -268,7 +266,6 @@ static void write_settings(struct settin
 	write_string("defrag", thp_defrag_strings[settings->thp_defrag]);
 	write_string("shmem_enabled",
 			shmem_enabled_strings[settings->shmem_enabled]);
-	write_num("debug_cow", settings->debug_cow);
 	write_num("use_zero_page", settings->use_zero_page);
 
 	write_num("khugepaged/defrag", khugepaged->defrag);
@@ -304,7 +301,6 @@ static void save_settings(void)
 		.thp_defrag = read_string("defrag", thp_defrag_strings),
 		.shmem_enabled =
 			read_string("shmem_enabled", shmem_enabled_strings),
-		.debug_cow = read_num("debug_cow"),
 		.use_zero_page = read_num("use_zero_page"),
 	};
 	saved_settings.khugepaged = (struct khugepaged_settings) {
_

Patches currently in -mm which might be from sunnanyong@huawei.com are

khugepaged-selftests-remove-debug_cow.patch