[merged mm-stable] mm-damon-sysfs-return-err-value-when-call-kstrtoul-failed.patch removed from -mm tree

[Andrew Morton <akpm@linux-foundation.org>]

The quilt patch titled
     Subject: mm/damon/sysfs: return 'err' value when call kstrtoul() failed
has been removed from the -mm tree.  Its filename was
     mm-damon-sysfs-return-err-value-when-call-kstrtoul-failed.patch

This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

------------------------------------------------------
From: Xin Hao <xhao@linux.alibaba.com>
Subject: mm/damon/sysfs: return 'err' value when call kstrtoul() failed
Date: Tue, 20 Sep 2022 16:35:30 +0000

We had better return the 'err' value when calling kstrtoul() failed, so
the user will know why it really fails, there do little change, let it
return the 'err' value when failed.

Link: https://lkml.kernel.org/r/6329ebe0.050a0220.ec4bd.297cSMTPIN_ADDED_BROKEN@mx.google.com
Suggested-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Xin Hao <xhao@linux.alibaba.com>
Reviewed-by: SeongJae Park <sj@kernel.org>
Signed-off-by: SeongJae Park <sj@kernel.org>
Reviewed-by: Xin Hao <xhao@linux.alibaba.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/damon/sysfs.c |   46 +++++++++++++--------------------------------
 1 file changed, 14 insertions(+), 32 deletions(-)

--- a/mm/damon/sysfs.c~mm-damon-sysfs-return-err-value-when-call-kstrtoul-failed
+++ a/mm/damon/sysfs.c
@@ -58,7 +58,7 @@ static ssize_t min_store(struct kobject
 
 	err = kstrtoul(buf, 0, &min);
 	if (err)
-		return -EINVAL;
+		return err;
 
 	range->min = min;
 	return count;
@@ -83,7 +83,7 @@ static ssize_t max_store(struct kobject
 
 	err = kstrtoul(buf, 0, &max);
 	if (err)
-		return -EINVAL;
+		return err;
 
 	range->max = max;
 	return count;
@@ -291,9 +291,7 @@ static ssize_t interval_us_store(struct
 			struct damon_sysfs_watermarks, kobj);
 	int err = kstrtoul(buf, 0, &watermarks->interval_us);
 
-	if (err)
-		return -EINVAL;
-	return count;
+	return err ? err : count;
 }
 
 static ssize_t high_show(struct kobject *kobj,
@@ -312,9 +310,7 @@ static ssize_t high_store(struct kobject
 			struct damon_sysfs_watermarks, kobj);
 	int err = kstrtoul(buf, 0, &watermarks->high);
 
-	if (err)
-		return -EINVAL;
-	return count;
+	return err ? err : count;
 }
 
 static ssize_t mid_show(struct kobject *kobj,
@@ -333,9 +329,7 @@ static ssize_t mid_store(struct kobject
 			struct damon_sysfs_watermarks, kobj);
 	int err = kstrtoul(buf, 0, &watermarks->mid);
 
-	if (err)
-		return -EINVAL;
-	return count;
+	return err ? err : count;
 }
 
 static ssize_t low_show(struct kobject *kobj,
@@ -354,9 +348,7 @@ static ssize_t low_store(struct kobject
 			struct damon_sysfs_watermarks, kobj);
 	int err = kstrtoul(buf, 0, &watermarks->low);
 
-	if (err)
-		return -EINVAL;
-	return count;
+	return err ? err : count;
 }
 
 static void damon_sysfs_watermarks_release(struct kobject *kobj)
@@ -437,9 +429,7 @@ static ssize_t sz_permil_store(struct ko
 			struct damon_sysfs_weights, kobj);
 	int err = kstrtouint(buf, 0, &weights->sz);
 
-	if (err)
-		return -EINVAL;
-	return count;
+	return err ? err : count;
 }
 
 static ssize_t nr_accesses_permil_show(struct kobject *kobj,
@@ -458,9 +448,7 @@ static ssize_t nr_accesses_permil_store(
 			struct damon_sysfs_weights, kobj);
 	int err = kstrtouint(buf, 0, &weights->nr_accesses);
 
-	if (err)
-		return -EINVAL;
-	return count;
+	return err ? err : count;
 }
 
 static ssize_t age_permil_show(struct kobject *kobj,
@@ -479,9 +467,7 @@ static ssize_t age_permil_store(struct k
 			struct damon_sysfs_weights, kobj);
 	int err = kstrtouint(buf, 0, &weights->age);
 
-	if (err)
-		return -EINVAL;
-	return count;
+	return err ? err : count;
 }
 
 static void damon_sysfs_weights_release(struct kobject *kobj)
@@ -1111,9 +1097,7 @@ static ssize_t start_store(struct kobjec
 			struct damon_sysfs_region, kobj);
 	int err = kstrtoul(buf, 0, &region->start);
 
-	if (err)
-		return -EINVAL;
-	return count;
+	return err ? err : count;
 }
 
 static ssize_t end_show(struct kobject *kobj, struct kobj_attribute *attr,
@@ -1132,9 +1116,7 @@ static ssize_t end_store(struct kobject
 			struct damon_sysfs_region, kobj);
 	int err = kstrtoul(buf, 0, &region->end);
 
-	if (err)
-		return -EINVAL;
-	return count;
+	return err ? err : count;
 }
 
 static void damon_sysfs_region_release(struct kobject *kobj)
@@ -1528,7 +1510,7 @@ static ssize_t sample_us_store(struct ko
 	int err = kstrtoul(buf, 0, &us);
 
 	if (err)
-		return -EINVAL;
+		return err;
 
 	intervals->sample_us = us;
 	return count;
@@ -1552,7 +1534,7 @@ static ssize_t aggr_us_store(struct kobj
 	int err = kstrtoul(buf, 0, &us);
 
 	if (err)
-		return -EINVAL;
+		return err;
 
 	intervals->aggr_us = us;
 	return count;
@@ -1576,7 +1558,7 @@ static ssize_t update_us_store(struct ko
 	int err = kstrtoul(buf, 0, &us);
 
 	if (err)
-		return -EINVAL;
+		return err;
 
 	intervals->update_us = us;
 	return count;
_

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

mm-damon-move-sz_damon_region-to-damon_sz_region.patch
mm-damon-use-damon_sz_region-in-appropriate-place.patch