+ mm-damon-implement-a-minimal-stub-for-sysfs-based-damon-interface-fix.patch added to -mm tree

+ mm-damon-implement-a-minimal-stub-for-sysfs-based-damon-interface-fix.patch added to -mm tree

[Andrew Morton]

The patch titled
     Subject: mm/damon/sysfs: fix missing error code in damon_sysfs_attrs_add_dirs()
has been added to the -mm tree.  Its filename is
     mm-damon-implement-a-minimal-stub-for-sysfs-based-damon-interface-fix.patch

This patch should soon appear at
    https://ozlabs.org/~akpm/mmots/broken-out/mm-damon-implement-a-minimal-stub-for-sysfs-based-damon-interface-fix.patch
and later at
    https://ozlabs.org/~akpm/mmotm/broken-out/mm-damon-implement-a-minimal-stub-for-sysfs-based-damon-interface-fix.patch

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------------------------------------------------------
From: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Subject: mm/damon/sysfs: fix missing error code in damon_sysfs_attrs_add_dirs()

The error code is missing in this code scenario, add the error code
'-ENOMEM' to the return value 'err'.

Eliminate the follow smatch warning:

mm/damon/sysfs.c:1647 damon_sysfs_attrs_add_dirs() warn: missing error
code 'err'.

Link: https://lkml.kernel.org/r/20220302111120.24984-1-jiapeng.chong@linux.alibaba.com
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Reviewed-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/damon/sysfs.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/mm/damon/sysfs.c~mm-damon-implement-a-minimal-stub-for-sysfs-based-damon-interface-fix
+++ a/mm/damon/sysfs.c
@@ -452,8 +452,10 @@ static int damon_sysfs_attrs_add_dirs(st
 	attrs->intervals = intervals;
 
 	nr_regions_range = damon_sysfs_ul_range_alloc(10, 1000);
-	if (!nr_regions_range)
+	if (!nr_regions_range) {
+		err = -ENOMEM;
 		goto put_intervals_out;
+	}
 
 	err = kobject_init_and_add(&nr_regions_range->kobj,
 			&damon_sysfs_ul_range_ktype, &attrs->kobj,
_

Patches currently in -mm which might be from jiapeng.chong@linux.alibaba.com are

mm-vmallocc-fix-unused-function-warning.patch
mm-damon-implement-a-minimal-stub-for-sysfs-based-damon-interface-fix.patch