[PATCH RFC v2 01/12] fs/configfs: rework configfs_is_root()

[hare@kernel.org]

From: Hannes Reinecke <hare@suse.de>

In preparation for making configfs namespace-aware rework
configfs_is_root() to not rely on static structures but
rather use the information in the structures themselves.

Signed-off-by: Hannes Reinecke <hare@suse.de>
---
 fs/configfs/configfs_internal.h | 2 +-
 fs/configfs/mount.c             | 9 +++++++--
 2 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/fs/configfs/configfs_internal.h b/fs/configfs/configfs_internal.h
index acdeea8e2d69ac9d621e1a42b039719811c31757..6261e1f3ec201a58a5d46b08dfbced8c2a44d82b 100644
--- a/fs/configfs/configfs_internal.h
+++ b/fs/configfs/configfs_internal.h
@@ -63,7 +63,7 @@ extern spinlock_t configfs_dirent_lock;
 
 extern struct kmem_cache *configfs_dir_cachep;
 
-extern int configfs_is_root(struct config_item *item);
+extern bool configfs_is_root(struct config_item *item);
 
 extern struct inode * configfs_new_inode(umode_t mode, struct configfs_dirent *, struct super_block *);
 extern struct inode *configfs_create(struct dentry *, umode_t mode);
diff --git a/fs/configfs/mount.c b/fs/configfs/mount.c
index 4929f343118946eaa55a539db4192e9c6621a8dc..88da7b428e52f2f4ab139ad3907101f685d617b1 100644
--- a/fs/configfs/mount.c
+++ b/fs/configfs/mount.c
@@ -47,9 +47,14 @@ static struct config_group configfs_root_group = {
 	},
 };
 
-int configfs_is_root(struct config_item *item)
+bool configfs_is_root(struct config_item *item)
 {
-	return item == &configfs_root_group.cg_item;
+	struct configfs_dirent *sd;
+
+	if (!item->ci_dentry)
+		return false;
+	sd = item->ci_dentry->d_fsdata;
+	return !!(sd->s_type & CONFIGFS_ROOT);
 }
 
 static struct configfs_dirent configfs_root = {

-- 
2.51.0