Regression (ARM) arch/arm/mm/init.c doesn't build without CONFIG_ARM_PATCH_PHYS_VIRT.

From: Krzysztof HaÅasa
Date: Tue Dec 31 2013 - 06:21:01 EST

arch/arm/mm/init.c: In function 'setup_dma_zone':
arch/arm/mm/init.c:232:19: error: '__pv_phys_offset' undeclared (first use in this function)

Reverting the following commit fixes it:

commit 787b0d5c1ca7ff24feb6f92e4c7f4410ee7d81a8
Author: Santosh Shilimkar <santosh.shilimkar@xxxxxx>
Date: Mon Dec 2 20:29:12 2013 +0100

ARM: 7908/1: mm: Fix the arm_dma_limit calculation

Current code is using PHYS_OFFSET to calculate the arm_dma_limit which
will lead to wrong calculations in cases where PHYS_OFFSET is updated

So fix the code by using __pv_phys_offset instead of PHYS_OFFSET.

It seems PHYS_OFFSET is equal to __pv_phys_offset if the latter is

arch/arm/include/asm/memory.h:#define PHYS_OFFSET __pv_phys_offset

hard-coded CONFIG value, or whatever the platform/CPU code needs:

arch/arm/include/asm/memory.h:#define PHYS_OFFSET PLAT_PHYS_OFFSET

Perhaps the patch in question was needed at some point but I think the
situation had changed before it was commited.
Krzysztof Halasa

Research Institute for Automation and Measurements PIAP
Al. Jerozolimskie 202, 02-486 Warsaw, Poland
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