of: base: add of_parse_phandle_with_optional_args()

[platform/kernel/linux-starfive.git] / mm / backing-dev.c

diff --git a/mm/backing-dev.c b/mm/backing-dev.c
index c30419a..a53b936 100644 (file)
--- a/mm/backing-dev.c
+++ b/mm/backing-dev.c
@@ -178,7 +178,26 @@ static ssize_t min_ratio_store(struct device *dev,
 
        return ret;
 }
-BDI_SHOW(min_ratio, bdi->min_ratio)
+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)
@@ -197,7 +216,82 @@ static ssize_t max_ratio_store(struct device *dev,
 
        return ret;
 }
-BDI_SHOW(max_ratio, bdi->max_ratio)
+BDI_SHOW(max_ratio, bdi->max_ratio / BDI_RATIO_SCALE)
+
+static ssize_t max_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_max_ratio_no_scale(bdi, ratio);
+       if (!ret)
+               ret = count;
+
+       return ret;
+}
+BDI_SHOW(max_ratio_fine, bdi->max_ratio)
+
+static ssize_t min_bytes_show(struct device *dev,
+                             struct device_attribute *attr,
+                             char *buf)
+{
+       struct backing_dev_info *bdi = dev_get_drvdata(dev);
+
+       return sysfs_emit(buf, "%llu\n", bdi_get_min_bytes(bdi));
+}
+
+static ssize_t min_bytes_store(struct device *dev,
+               struct device_attribute *attr, const char *buf, size_t count)
+{
+       struct backing_dev_info *bdi = dev_get_drvdata(dev);
+       u64 bytes;
+       ssize_t ret;
+
+       ret = kstrtoull(buf, 10, &bytes);
+       if (ret < 0)
+               return ret;
+
+       ret = bdi_set_min_bytes(bdi, bytes);
+       if (!ret)
+               ret = count;
+
+       return ret;
+}
+DEVICE_ATTR_RW(min_bytes);
+
+static ssize_t max_bytes_show(struct device *dev,
+                             struct device_attribute *attr,
+                             char *buf)
+{
+       struct backing_dev_info *bdi = dev_get_drvdata(dev);
+
+       return sysfs_emit(buf, "%llu\n", bdi_get_max_bytes(bdi));
+}
+
+static ssize_t max_bytes_store(struct device *dev,
+               struct device_attribute *attr, const char *buf, size_t count)
+{
+       struct backing_dev_info *bdi = dev_get_drvdata(dev);
+       u64 bytes;
+       ssize_t ret;
+
+       ret = kstrtoull(buf, 10, &bytes);
+       if (ret < 0)
+               return ret;
+
+       ret = bdi_set_max_bytes(bdi, bytes);
+       if (!ret)
+               ret = count;
+
+       return ret;
+}
+DEVICE_ATTR_RW(max_bytes);
 
 static ssize_t stable_pages_required_show(struct device *dev,
                                          struct device_attribute *attr,
@@ -209,11 +303,44 @@ static ssize_t stable_pages_required_show(struct device *dev,
 }
 static DEVICE_ATTR_RO(stable_pages_required);
 
+static ssize_t strict_limit_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 strict_limit;
+       ssize_t ret;
+
+       ret = kstrtouint(buf, 10, &strict_limit);
+       if (ret < 0)
+               return ret;
+
+       ret = bdi_set_strict_limit(bdi, strict_limit);
+       if (!ret)
+               ret = count;
+
+       return ret;
+}
+
+static ssize_t strict_limit_show(struct device *dev,
+               struct device_attribute *attr, char *buf)
+{
+       struct backing_dev_info *bdi = dev_get_drvdata(dev);
+
+       return sysfs_emit(buf, "%d\n",
+                       !!(bdi->capabilities & BDI_CAP_STRICTLIMIT));
+}
+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,
+       &dev_attr_max_bytes.attr,
        &dev_attr_stable_pages_required.attr,
+       &dev_attr_strict_limit.attr,
        NULL,
 };
 ATTRIBUTE_GROUPS(bdi_dev);
@@ -780,7 +907,7 @@ int bdi_init(struct backing_dev_info *bdi)
 
        kref_init(&bdi->refcnt);
        bdi->min_ratio = 0;
-       bdi->max_ratio = 100;
+       bdi->max_ratio = 100 * BDI_RATIO_SCALE;
        bdi->max_prop_frac = FPROP_FRAC_BASE;
        INIT_LIST_HEAD(&bdi->bdi_list);
        INIT_LIST_HEAD(&bdi->wb_list);