Re: [PATCH] unshare: Cleanup up the sys_unshare interface before weare committed.

[Andrew Morton]

ebiederm@xxxxxxxxxxxx (Eric W. Biederman) wrote:
>
> Since we have not crossed the magic 2.6.16 line can we please
>  include this patch.  My apologies for catching this so late in the
>  cycle.
> 
>  - Error if we are passed any flags we don't expect.
> 
>    This preserves forward compatibility so programs that use new flags that
>    run on old kernels will fail instead of silently doing the wrong thing.

Makes sense.

>  - Use separate defines from sys_clone.
> 
>    sys_unshare can't implement half of the clone flags under any circumstances
>    and those that it does implement have subtlely different semantics than
>    the clone flags.  Using a different set of flags sets the
>    expectation that things will be different.

iirc there was some discussion about this and it was explicitly decided to
keep the CLONE flags.

Maybe Janak or Linus can comment?
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