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| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2009-03-19 19:34:08 +0000 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2009-03-24 13:47:33 +1100 |
| commit | 8d1cf34e7ad5c7738ce20d20bd7f002f562cb8b5 (patch) | |
| tree | f731b8b2d3e71e7287bed977bdd7fc9ea6942d45 /arch/powerpc/include/asm/pte-hash64-4k.h | |
| parent | 2a7d55fda58eb4e3652252d4f71222bd1ff90c5e (diff) | |
| download | kernel-crypto-8d1cf34e7ad5c7738ce20d20bd7f002f562cb8b5.tar.gz kernel-crypto-8d1cf34e7ad5c7738ce20d20bd7f002f562cb8b5.tar.xz kernel-crypto-8d1cf34e7ad5c7738ce20d20bd7f002f562cb8b5.zip | |
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>
Diffstat (limited to 'arch/powerpc/include/asm/pte-hash64-4k.h')
| -rw-r--r-- | arch/powerpc/include/asm/pte-hash64-4k.h | 3 |
1 files changed, 0 insertions, 3 deletions
diff --git a/arch/powerpc/include/asm/pte-hash64-4k.h b/arch/powerpc/include/asm/pte-hash64-4k.h index 29fdc158fe3..c134e809aac 100644 --- a/arch/powerpc/include/asm/pte-hash64-4k.h +++ b/arch/powerpc/include/asm/pte-hash64-4k.h @@ -8,9 +8,6 @@ #define _PAGE_F_GIX _PAGE_GROUP_IX #define _PAGE_SPECIAL 0x10000 /* software: special page */ -/* There is no 4K PFN hack on 4K pages */ -#define _PAGE_4K_PFN 0 - /* PTE flags to conserve for HPTE identification */ #define _PAGE_HPTEFLAGS (_PAGE_BUSY | _PAGE_HASHPTE | \ _PAGE_SECONDARY | _PAGE_GROUP_IX) |