tree f731b8b2d3e71e7287bed977bdd7fc9ea6942d45
parent 2a7d55fda58eb4e3652252d4f71222bd1ff90c5e
author Benjamin Herrenschmidt <benh@kernel.crashing.org> 1237491248 +0000
committer Benjamin Herrenschmidt <benh@kernel.crashing.org> 1237862853 +1100

powerpc/mm: Tweak PTE bit combination definitions

This patch tweaks the way some PTE bit combinations are defined, in such a
way that the 32 and 64-bit variant become almost identical and that will
make it easier to bring in a new common pte-* file for the new variant
of the Book3-E support.

The combination of bits defining access to kernel pages are now clearly
separated from the combination used by userspace and the core VM. The
resulting generated code should remain identical unless I made a mistake.

Note: While at it, I removed a non-sensical statement related to CONFIG_KGDB
in ppc_mmu_32.c which could cause kernel mappings to be user accessible when
that option is enabled. Probably something that bitrot.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>