Re: [GIT RFC] percpu: use dynamic percpu allocator as the defaultpercpu allocator

[Ingo Molnar]

* Tejun Heo <tj@xxxxxxxxxx> wrote:

> > With your patches and a RELOC_HIDE version that uses the GOTENT 
> > indirection the kernel won't compile because the "X" constraint 
> > for the GOTENT access needs a symbol and there are quite a few 
> > users that pass a pointer. I do not see a simple solution for 
> > that problem yet.
> 
> Ah... okay.  Now I get it.  It wasn't expecting variables there.  How
> about doing the following?
> 
>  #define SHIFT_PERCPU_PTR(ptr, offset) (({				\
> 	 if (__builtin_constant_p(ptr))					\
> 		 do GOTENT trick;					\
> 	 else								\
> 		 RELOC_HIDE();						\
>  }))
> 
> Thanks.

Btw., is there any intermediate fix/workaround i could apply 
perhaps? I'd like to send the percpu bits early in the merge window 
and would hate to break Martin's arch ...

	Ingo
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