backing-dev: convert class code to use dev_groups

The dev_attrs field of struct class is going away soon, dev_groups
should be used instead.  This converts the backing device class code to
use the correct field.

Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Jan Kara <jack@suse.cz>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/mm/backing-dev.c b/mm/backing-dev.c
index e04454c..37d9edc 100644 (file)
--- a/mm/backing-dev.c
+++ b/mm/backing-dev.c
@@ -180,7 +180,8 @@ static ssize_t name##_show(struct device *dev,                              \
        struct backing_dev_info *bdi = dev_get_drvdata(dev);            \
                                                                        \
        return snprintf(page, PAGE_SIZE-1, "%lld\n", (long long)expr);  \
-}
+}                                                                      \
+static DEVICE_ATTR_RW(name);
 
 BDI_SHOW(read_ahead_kb, K(bdi->ra_pages))
 
@@ -231,14 +232,16 @@ static ssize_t stable_pages_required_show(struct device *dev,
        return snprintf(page, PAGE_SIZE-1, "%d\n",
                        bdi_cap_stable_pages_required(bdi) ? 1 : 0);
 }
+static DEVICE_ATTR_RO(stable_pages_required);
 
-static struct device_attribute bdi_dev_attrs[] = {
-       __ATTR_RW(read_ahead_kb),
-       __ATTR_RW(min_ratio),
-       __ATTR_RW(max_ratio),
-       __ATTR_RO(stable_pages_required),
-       __ATTR_NULL,
+static struct attribute *bdi_dev_attrs[] = {
+       &dev_attr_read_ahead_kb.attr,
+       &dev_attr_min_ratio.attr,
+       &dev_attr_max_ratio.attr,
+       &dev_attr_stable_pages_required.attr,
+       NULL,
 };
+ATTRIBUTE_GROUPS(bdi_dev);
 
 static __init int bdi_class_init(void)
 {
@@ -246,7 +249,7 @@ static __init int bdi_class_init(void)
        if (IS_ERR(bdi_class))
                return PTR_ERR(bdi_class);
 
-       bdi_class->dev_attrs = bdi_dev_attrs;
+       bdi_class->dev_groups = bdi_dev_groups;
        bdi_debug_init();
        return 0;
 }