On Mon, 1 Oct 2007 16:15:53 +0400
Alexey Dobriyan <adobriyan@sw.ru> wrote:

> Save ~650 bytes here.
> 
> add/remove: 4/0 grow/shrink: 0/7 up/down: 430/-1088 (-658)
> function                                     old     new   delta
> __copy_fs_struct                               -     202    +202
> __put_fs_struct                                -     112    +112
> __exit_fs                                      -      58     +58
> __exit_files                                   -      58     +58
> exit_files                                    58       2     -56
> put_fs_struct                                112       5    -107
> exit_fs                                      161       2    -159
> sys_unshare                                  774     590    -184
> copy_process                                4031    3840    -191
> do_exit                                     1791    1597    -194
> copy_fs_struct                               202       5    -197
> 
> No difference in lmbench lat_proc tests on 2-way Opteron 246.
> Smaaaal degradation on UP P4 (within errors).
> 

is there any impact on stack usage?