[merged mm-stable] mm-add-sys-class-bdi-bdi-min_ratio_fine-knob.patch removed from -mm tree

[merged mm-stable] mm-add-sys-class-bdi-bdi-min_ratio_fine-knob.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: mm: add /sys/class/bdi/<bdi>/min_ratio_fine knob
has been removed from the -mm tree.  Its filename was
     mm-add-sys-class-bdi-bdi-min_ratio_fine-knob.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: Stefan Roesch <shr@devkernel.io>
Subject: mm: add /sys/class/bdi/<bdi>/min_ratio_fine knob
Date: Fri, 18 Nov 2022 16:52:14 -0800

This adds the min_ratio_fine knob. The knob specifies the values not
based on 1 of 100, but instead 1 per million.

Link: https://lkml.kernel.org/r/20221119005215.3052436-20-shr@devkernel.io
Signed-off-by: Stefan Roesch <shr@devkernel.io>
Cc: Chris Mason <clm@meta.com>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/backing-dev.c |   20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

--- a/mm/backing-dev.c~mm-add-sys-class-bdi-bdi-min_ratio_fine-knob
+++ a/mm/backing-dev.c
@@ -180,6 +180,25 @@ static ssize_t min_ratio_store(struct de
 }
 BDI_SHOW(min_ratio, bdi->min_ratio / BDI_RATIO_SCALE)
 
+static ssize_t min_ratio_fine_store(struct device *dev,
+		struct device_attribute *attr, const char *buf, size_t count)
+{
+	struct backing_dev_info *bdi = dev_get_drvdata(dev);
+	unsigned int ratio;
+	ssize_t ret;
+
+	ret = kstrtouint(buf, 10, &ratio);
+	if (ret < 0)
+		return ret;
+
+	ret = bdi_set_min_ratio_no_scale(bdi, ratio);
+	if (!ret)
+		ret = count;
+
+	return ret;
+}
+BDI_SHOW(min_ratio_fine, bdi->min_ratio)
+
 static ssize_t max_ratio_store(struct device *dev,
 		struct device_attribute *attr, const char *buf, size_t count)
 {
@@ -315,6 +334,7 @@ static DEVICE_ATTR_RW(strict_limit);
 static struct attribute *bdi_dev_attrs[] = {
 	&dev_attr_read_ahead_kb.attr,
 	&dev_attr_min_ratio.attr,
+	&dev_attr_min_ratio_fine.attr,
 	&dev_attr_max_ratio.attr,
 	&dev_attr_max_ratio_fine.attr,
 	&dev_attr_min_bytes.attr,
_

Patches currently in -mm which might be from shr@devkernel.io are