SB_NOUSER
fc->sb_flags |= SB_NOUSER;
if (mnt->mnt.mnt_sb->s_flags & SB_NOUSER)
path->mnt->mnt_sb->s_flags & SB_NOUSER)
nsfs_mnt->mnt_sb->s_flags &= ~SB_NOUSER;
fc->sb_flags = SB_NOUSER;
if (file_inode(file)->i_sb->s_flags & (SB_NOUSER | SB_KERNMOUNT))
sb->s_flags |= SB_NOUSER;
sb->s_flags |= SB_NOUSER;
aafs_mnt->mnt_sb->s_flags &= ~SB_NOUSER;
return !(dentry->d_sb->s_flags & SB_NOUSER);
return (dentry->d_sb->s_flags & SB_NOUSER) ||
(fd_file(f)->f_path.dentry->d_sb->s_flags & SB_NOUSER) ||