SB_I_USERNS_VISIBLE 3918 fs/namespace.c if (!(s_iflags & SB_I_USERNS_VISIBLE)) SB_I_USERNS_VISIBLE 107 fs/proc/root.c s->s_iflags |= SB_I_USERNS_VISIBLE | SB_I_NOEXEC | SB_I_NODEV; SB_I_USERNS_VISIBLE 36 fs/sysfs/mount.c fc->root->d_sb->s_iflags |= SB_I_USERNS_VISIBLE;