Re: arch/mips (and arch/alpha) pmap.c dependency on SYSVSHM

[christos%astron.com@localhost (Christos Zoulas)]

In article <Pine.NEB.4.64.1511050834200.7978%vps1.whooppee.com@localhost>,
Paul Goyette  <paul%whooppee.com@localhost> wrote:
>On Thu, 5 Nov 2015, Paul Goyette wrote:
>
>> Following up on my earlier modularization of the SYSV IPC code, I have
>> discovered that mips's pmap.c includes some SYSVSHM size in the calcs
>> for the system map sizes.  At line 516 in arch/mips/mips/pmap.c we have
>>
>> #ifdef SYSVSHM
>>        Sysmapsize += shminfo.shmall;
>> #endif
>>
>> In arch/alpha/alpha/pmap.c we have at line 781
>>
>> #ifdef SYSVSHM
>>        lev3mapsize += shminfo.shmall;
>> #endif
>
>We also have the following code in arch/powerpc/booke/booke_pmap.c at
>line 199
>
>#ifdef SYSVSHM
>             + NBPG * shminfo.shmall
>#endif

This is called at pmap_bootstrap() so it is too late because
by the time you've loaded them module this code has ran.

If you look in sysv_ipc.c the shminfo member shmall was 0.
pmap_bootstrap() is called via init_$MACHINE() from locore.S
just before main() is called. The shminit() code is called from
main.

So this code has been a no-op for a long time, just remove it.

We should also fix things so that we don't need to call the init
functions in init_main.c when they are built-in... All these ifdefs
need to go...

christos