Subject: Re: [PATCH 1/2] powerpc/85xx: fix problem that prevents PHYS_64BIT from configurable

From: Timur Tabi <[email-masked]>
Date: Fri, 17 Feb 2012 17:01:09 -0600

So I noticed something else.  PHYS_64BIT is not defined in
mpc85xx_smp_defconfig.  This means that if we want to build a 36-bit
kernel, we need to have "select PHYS_64BIT" in the Kconfig for that board.
 This is what we have today for the P1022DS.

However, that select statement also means that we can't build a 32-bit
kernel.  This is a problem for mpc85xx_defconfig, because that defconfig
includes support for the MPC8540ADS.  The 8540 has an e500v1 core which
doesn't support MAS7 (i.e. no 36-bit physical addresses).

So any patch that removes "select PHYS_64BIT" from an mpc85xx_defconfig
board must also turn on that option in the defconfig.  The patches from me
and Leo don't do that.

-- 
Timur Tabi
Linux kernel developer at Freescale