Re: [PATCH] Use MM_VM_SIZE in exit_mmap

[Anton Blanchard <anton@samba.org>]

 
> I don't really like it in general when we do
> 
> #define MAYBE_CONST_LOOKING_THING      (some_func())
> 
> I would almost rather see something like task_size(current) used.

I dont particularly like it, but it would be better for that to be a
separate cleanup patch. I want to maximise my changes of this going in
soon :)

> > ===== include/linux/mm.h 1.212 vs edited =====
> > +++ edited/include/linux/mm.h	2005-01-26 01:20:12 +11:00
> > @@ -38,7 +38,7 @@
> >  #include <asm/atomic.h>
> >  
> >  #ifndef MM_VM_SIZE
> > -#define MM_VM_SIZE(mm)	TASK_SIZE
> > +#define MM_VM_SIZE(mm)	((TASK_SIZE + PGDIR_SIZE - 1) & PGDIR_MASK)
> >  #endif
> >  
> >  #define nth_page(page,n) pfn_to_page(page_to_pfn((page)) + (n))
> ia64 asm/processor.h already has:
> 
> #define DEFAULT_TASK_SIZE       __IA64_UL_CONST(0xa000000000000000)
> [...]
> #define MM_VM_SIZE(mm)          DEFAULT_TASK_SIZE
> 
> So I think this will generate a warning there?

Im confused. It does? 

Anton