[Drbd-dev] simplify procfs code for seq_file instances

[Alexey Dobriyan]

On Tue, Apr 24, 2018 at 06:06:53PM +0200, Christoph Hellwig wrote:
> On Tue, Apr 24, 2018 at 08:19:16AM -0700, Andrew Morton wrote:
> > > > I want to ask if it is time to start using poorman function overloading
> > > > with _b_c_e(). There are millions of allocation functions for example,
> > > > all slightly difference, and people will add more. Seeing /proc interfaces
> > > > doubled like this is painful.
> > > 
> > > Function overloading is totally unacceptable.
> > > 
> > > And I very much disagree with a tradeoff that keeps 5000 lines of 
> > > code vs a few new helpers.
> > 
> > OK, the curiosity and suspense are killing me.  What the heck is
> > "function overloading with _b_c_e()"?
> 
> The way I understood Alexey was to use have a proc_create macro
> that can take different ops types.  Although the short cut for
> __builtin_types_compatible_p would be _b_t_c or similar, so maybe
> I misunderstood him.

That's correct.

I also think that several dozens kmalloc signatures are a problem.

And there will be more with pmalloc* stuff and more 2D/3D array
checked allocations and who knows what.
And I want to add typed kmalloc!