sysfs: Create mountpoints with sysfs_create_mount_point

commit f9bb48825a6b5d02f4cabcc78967c75db903dcdc upstream.

This allows for better documentation in the code and
it allows for a simpler and fully correct version of
fs_fully_visible to be written.

The mount points converted and their filesystems are:
/sys/hypervisor/s390/       s390_hypfs
/sys/kernel/config/         configfs
/sys/kernel/debug/          debugfs
/sys/firmware/efi/efivars/  efivarfs
/sys/fs/fuse/connections/   fusectl
/sys/fs/pstore/             pstore
/sys/kernel/tracing/        tracefs
/sys/fs/cgroup/             cgroup
/sys/kernel/security/       securityfs
/sys/fs/selinux/            selinuxfs
/sys/fs/smackfs/            smackfs

Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 4 insertions, 8 deletions

diff --git a/arch/s390/hypfs/inode.c b/arch/s390/hypfs/inode.c
index d3f896a35b98..2eeb0a0f506d 100644
--- a/arch/s390/hypfs/inode.c
+++ b/arch/s390/hypfs/inode.c
@@ -456,8 +456,6 @@ static const struct super_operations hypfs_s_ops = {
         .show_options   = hypfs_show_options,
 };
 
-static struct kobject *s390_kobj;
-
 static int __init hypfs_init(void)
 {
         int rc;
@@ -481,18 +479,16 @@ static int __init hypfs_init(void)
                 rc = -ENODATA;
                 goto fail_hypfs_sprp_exit;
         }
-        s390_kobj = kobject_create_and_add("s390", hypervisor_kobj);
-        if (!s390_kobj) {
-                rc = -ENOMEM;
+        rc = sysfs_create_mount_point(hypervisor_kobj, "s390");
+        if (rc)
                 goto fail_hypfs_diag0c_exit;
-        }
         rc = register_filesystem(&hypfs_type);
         if (rc)
                 goto fail_filesystem;
         return 0;
 
 fail_filesystem:
-        kobject_put(s390_kobj);
+        sysfs_remove_mount_point(hypervisor_kobj, "s390");
 fail_hypfs_diag0c_exit:
         hypfs_diag0c_exit();
 fail_hypfs_sprp_exit:
@@ -510,7 +506,7 @@ fail_dbfs_exit:
 static void __exit hypfs_exit(void)
 {
         unregister_filesystem(&hypfs_type);
-        kobject_put(s390_kobj);
+        sysfs_remove_mount_point(hypervisor_kobj, "s390");
         hypfs_diag0c_exit();
         hypfs_sprp_exit();
         hypfs_vm_exit();