ARM: 7649/1: mm: mm->context.id fix for big-endian

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Since the new ASID code in b5466f8728
("ARM: mm: remove IPI broadcasting on ASID rollover") was changed to
use 64bit operations it has broken the BE operation due to an issue
with the MM code accessing sub-fields of mm->context.id.

When running in BE mode we see the values in mm->context.id are stored
with the highest value first, so the LDR in the arch/arm/mm/proc-macros.S
reads the wrong part of this field. To resolve this, change the LDR in
the mmid macro to load from +4.

Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

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Ben Dooks 2013-02-11 12:25:06 +01:00 • committed by Russell King

parent 352af7d4dd

commit 9520a5bece

2 changed files with 8 additions and 0 deletions

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3

arch/arm/mm/context.c

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5

arch/arm/mm/proc-macros.S

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