[PATCH 1/6] user namespace: make signal.c respect user namespaces (v4)

[Serge E. Hallyn]

Quoting Matt Helsley (matthltc at us.ibm.com):
> On Wed, Nov 09, 2011 at 08:18:53AM -0600, Serge E. Hallyn wrote:
> > Quoting Andrew Morton (akpm at linux-foundation.org):
> > > On Fri,  4 Nov 2011 22:24:37 +0000
> > > Serge Hallyn <serge at hallyn.com> wrote:
> > > 
> > > > +static inline void fixup_uid(struct siginfo *info, struct task_struct *t)
> 
> nit: Seems like the function name itself needs a fixup. I can imagine a
> user-ns-unaware kernel developer thinking this when they see code calling
> this function:
> 
> <naive>
> Gosh, why is the uid broken? I have no idea what this does or when it
> would be needed. Why hasn't it been splatted all over the kernel? Who broke
> it?
> </naive>
> 
> You can't even tell from the name that it's for user namespaces.

Heh, my first reaction was that you're over-reacting, but you're probably
right.  I don't want to conflict with the 'user_ns_map_uids' function,
so how about userns_fixup_signal_uids()?  Pls let me know if you have a
better name, otherwise I'll switch to this one.

thanks,
-serge