[PATCH v2 3/8] block: Replace all ktype default_attrs with groups

[Kimberly Brown <kimbrownkd@gmail.com>]

The kobj_type default_attrs field is being replaced by the
default_groups field. Replace all of the ktype default_attrs fields in
the block subsystem with default_groups and use the ATTRIBUTE_GROUPS
macro to create the default groups.

Remove default_ctx_attrs[] because it doesn't contain any attributes.

This patch was tested by verifying that the sysfs files for the
attributes in the default groups were created.

Signed-off-by: Kimberly Brown <kimbrownkd@gmail.com>
---
 block/blk-integrity.c | 3 ++-
 block/blk-mq-sysfs.c  | 8 ++------
 block/blk-sysfs.c     | 3 ++-
 3 files changed, 6 insertions(+), 8 deletions(-)

diff --git a/block/blk-integrity.c b/block/blk-integrity.c
index d1ab089e0919..85864c71e858 100644
--- a/block/blk-integrity.c
+++ b/block/blk-integrity.c
@@ -365,6 +365,7 @@ static struct attribute *integrity_attrs[] = {
 	&integrity_device_entry.attr,
 	NULL,
 };
+ATTRIBUTE_GROUPS(integrity);
 
 static const struct sysfs_ops integrity_ops = {
 	.show	= &integrity_attr_show,
@@ -372,7 +373,7 @@ static const struct sysfs_ops integrity_ops = {
 };
 
 static struct kobj_type integrity_ktype = {
-	.default_attrs	= integrity_attrs,
+	.default_groups = integrity_groups,
 	.sysfs_ops	= &integrity_ops,
 };
 
diff --git a/block/blk-mq-sysfs.c b/block/blk-mq-sysfs.c
index 3f9c3f4ac44c..5315e538b3b1 100644
--- a/block/blk-mq-sysfs.c
+++ b/block/blk-mq-sysfs.c
@@ -173,10 +173,6 @@ static ssize_t blk_mq_hw_sysfs_cpus_show(struct blk_mq_hw_ctx *hctx, char *page)
 	return ret;
 }
 
-static struct attribute *default_ctx_attrs[] = {
-	NULL,
-};
-
 static struct blk_mq_hw_ctx_sysfs_entry blk_mq_hw_sysfs_nr_tags = {
 	.attr = {.name = "nr_tags", .mode = 0444 },
 	.show = blk_mq_hw_sysfs_nr_tags_show,
@@ -196,6 +192,7 @@ static struct attribute *default_hw_ctx_attrs[] = {
 	&blk_mq_hw_sysfs_cpus.attr,
 	NULL,
 };
+ATTRIBUTE_GROUPS(default_hw_ctx);
 
 static const struct sysfs_ops blk_mq_sysfs_ops = {
 	.show	= blk_mq_sysfs_show,
@@ -214,13 +211,12 @@ static struct kobj_type blk_mq_ktype = {
 
 static struct kobj_type blk_mq_ctx_ktype = {
 	.sysfs_ops	= &blk_mq_sysfs_ops,
-	.default_attrs	= default_ctx_attrs,
 	.release	= blk_mq_ctx_sysfs_release,
 };
 
 static struct kobj_type blk_mq_hw_ktype = {
 	.sysfs_ops	= &blk_mq_hw_sysfs_ops,
-	.default_attrs	= default_hw_ctx_attrs,
+	.default_groups = default_hw_ctx_groups,
 	.release	= blk_mq_hw_sysfs_release,
 };
 
diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c
index 422327089e0f..7a95a1eb27e1 100644
--- a/block/blk-sysfs.c
+++ b/block/blk-sysfs.c
@@ -769,6 +769,7 @@ static struct attribute *default_attrs[] = {
 #endif
 	NULL,
 };
+ATTRIBUTE_GROUPS(default);
 
 #define to_queue(atr) container_of((atr), struct queue_sysfs_entry, attr)
 
@@ -890,7 +891,7 @@ static const struct sysfs_ops queue_sysfs_ops = {
 
 struct kobj_type blk_queue_ktype = {
 	.sysfs_ops	= &queue_sysfs_ops,
-	.default_attrs	= default_attrs,
+	.default_groups = default_groups,
 	.release	= blk_release_queue,
 };
 
-- 
2.17.1