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Subject[PATCH v3 0/2] powerpc32: handle inverted _PAGE_RW bit outside of TLB handlers
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Some powerpc like the 8xx don't have a RW bit in PTE bits but a RO (Read Only) bit.
This patch implements the handling of a _PAGE_RO flag to be used in place of _PAGE_RW

Patchset:
1) powerpc32: adds handling of _PAGE_RO
2) powerpc/8xx: use _PAGE_RO instead of _PAGE_RW

All changes have been successfully tested on MPC885

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Tested-by: Christophe Leroy <christophe.leroy@c-s.fr>

---
v2 is a complete rework compared to v1
v3 takes into account comments from Scott on v2

arch/powerpc/include/asm/pgtable-ppc32.h | 12 +++++++-----
arch/powerpc/include/asm/pgtable.h | 7 +++++--
arch/powerpc/include/asm/pte-8xx.h | 9 ++++-----
arch/powerpc/include/asm/pte-common.h | 25 +++++++++++++++++--------
arch/powerpc/kernel/head_8xx.S | 3 ---
arch/powerpc/mm/gup.c | 2 ++
arch/powerpc/mm/pgtable_32.c | 2 +-
7 files changed, 36 insertions(+), 24 deletions(-)


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