On Mon, Apr 04, 2022 at 09:41:36AM -0400, Gabriel Krisman Bertazi wrote:
> In order to expose tmpfs statistics on sysfs, add the boilerplate code
> to create the /sys/fs/tmpfs structure. As suggested on a previous
> review, this uses the minor as the volume directory in /sys/fs/.
>
> This takes care of not exposing SB_NOUSER mounts. I don't think we have
> a usecase for showing them and, since they don't appear elsewhere, they
> might be confusing to users.
>
> Signed-off-by: Gabriel Krisman Bertazi <krisman@xxxxxxxxxxxxx>
> +static void shmem_unregister_sysfs(struct super_block *sb)
> +{
> + struct shmem_sb_info *sbinfo = SHMEM_SB(sb);
> +
> + kobject_del(&sbinfo->s_kobj);
> + kobject_put(&sbinfo->s_kobj);
> + wait_for_completion(&sbinfo->s_kobj_unregister);
> +}
If you embed kobject into something, you basically commit to
having the lifetime rules maintained by that kobject...
