bcache: use default_groups in kobj_type

mainline inclusion
from v5.18-rc1
commit fa97cb84
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I59A5L?from=project-issue
CVE: N/A

--------------------------------------

There are currently 2 ways to create a set of sysfs files for a
kobj_type, through the default_attrs field, and the default_groups
field.  Move the bcache sysfs code to use default_groups field which has
been the preferred way since aa30f47c ("kobject: Add support for
default attribute groups to kobj_type") so that we can soon get rid of
the obsolete default_attrs field.

Cc: Kent Overstreet <kent.overstreet@gmail.com>
Cc: linux-bcache@vger.kernel.org
Acked-by: NColy Li <colyli@suse.de>
Link: https://lore.kernel.org/r/20220106100004.3277439-1-gregkh@linuxfoundation.orgSigned-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: NJason Yan <yanaijie@huawei.com>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>

drivers/md/bcache/stats.c

@@ -78,7 +78,7 @@ static void bch_stats_release(struct kobject *k)
 {
 }
 
-static struct attribute *bch_stats_files[] = {
+static struct attribute *bch_stats_attrs[] = {
 	&sysfs_cache_hits,
 	&sysfs_cache_misses,
 	&sysfs_cache_bypass_hits,
@@ -88,6 +88,7 @@ static struct attribute *bch_stats_files[] = {
 	&sysfs_bypassed,
 	NULL
 };
+ATTRIBUTE_GROUPS(bch_stats);
 static KTYPE(bch_stats);
 
 int bch_cache_accounting_add_kobjs(struct cache_accounting *acc,

drivers/md/bcache/sysfs.c

@@ -500,7 +500,7 @@ STORE(bch_cached_dev)
 	return size;
 }
 
-static struct attribute *bch_cached_dev_files[] = {
+static struct attribute *bch_cached_dev_attrs[] = {
 	&sysfs_attach,
 	&sysfs_detach,
 	&sysfs_stop,
@@ -543,6 +543,7 @@ static struct attribute *bch_cached_dev_files[] = {
 	&sysfs_backing_dev_uuid,
 	NULL
 };
+ATTRIBUTE_GROUPS(bch_cached_dev);
 KTYPE(bch_cached_dev);
 
 SHOW(bch_flash_dev)
@@ -600,7 +601,7 @@ STORE(__bch_flash_dev)
 }
 STORE_LOCKED(bch_flash_dev)
 
-static struct attribute *bch_flash_dev_files[] = {
+static struct attribute *bch_flash_dev_attrs[] = {
 	&sysfs_unregister,
 #if 0
 	&sysfs_data_csum,
@@ -609,6 +610,7 @@ static struct attribute *bch_flash_dev_files[] = {
 	&sysfs_size,
 	NULL
 };
+ATTRIBUTE_GROUPS(bch_flash_dev);
 KTYPE(bch_flash_dev);
 
 struct bset_stats_op {
@@ -955,7 +957,7 @@ static void bch_cache_set_internal_release(struct kobject *k)
 {
 }
 
-static struct attribute *bch_cache_set_files[] = {
+static struct attribute *bch_cache_set_attrs[] = {
 	&sysfs_unregister,
 	&sysfs_stop,
 	&sysfs_synchronous,
@@ -980,9 +982,10 @@ static struct attribute *bch_cache_set_files[] = {
 	&sysfs_clear_stats,
 	NULL
 };
+ATTRIBUTE_GROUPS(bch_cache_set);
 KTYPE(bch_cache_set);
 
-static struct attribute *bch_cache_set_internal_files[] = {
+static struct attribute *bch_cache_set_internal_attrs[] = {
 	&sysfs_active_journal_entries,
 
 	sysfs_time_stats_attribute_list(btree_gc, sec, ms)
@@ -1022,6 +1025,7 @@ static struct attribute *bch_cache_set_internal_files[] = {
 	&sysfs_feature_incompat,
 	NULL
 };
+ATTRIBUTE_GROUPS(bch_cache_set_internal);
 KTYPE(bch_cache_set_internal);
 
 static int __bch_cache_cmp(const void *l, const void *r)
@@ -1182,7 +1186,7 @@ STORE(__bch_cache)
 }
 STORE_LOCKED(bch_cache)
 
-static struct attribute *bch_cache_files[] = {
+static struct attribute *bch_cache_attrs[] = {
 	&sysfs_bucket_size,
 	&sysfs_block_size,
 	&sysfs_nbuckets,
@@ -1196,4 +1200,5 @@ static struct attribute *bch_cache_files[] = {
 	&sysfs_cache_replacement_policy,
 	NULL
 };
+ATTRIBUTE_GROUPS(bch_cache);
 KTYPE(bch_cache);

drivers/md/bcache/sysfs.h

@@ -9,7 +9,7 @@ struct kobj_type type ## _ktype = {					\
 		.show	= type ## _show,				\
 		.store	= type ## _store				\
 	}),								\
-	.default_attrs	= type ## _files				\
+	.default_groups	= type ## _groups				\
 }
 
 #define SHOW(fn)							\