diff options
| author | Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> | 2013-11-18 10:28:10 +0100 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2013-12-09 01:40:28 +0100 |
| commit | c8c06f5a0dde0fed260c54d550962187f266ed0d (patch) | |
| tree | f9fb794ebe4f9ebf0b32a8aabe53c99f275d7cc8 /arch/powerpc/include/asm/pte-hash64.h | |
| parent | powerpc/mm: Use HPTE constants when updating hpte bits (diff) | |
| download | linux-c8c06f5a0dde0fed260c54d550962187f266ed0d.tar.xz linux-c8c06f5a0dde0fed260c54d550962187f266ed0d.zip | |
powerpc/mm: Free up _PAGE_COHERENCE for numa fault use later
Set memory coherence always on hash64 config. If
a platform cannot have memory coherence always set they
can infer that from _PAGE_NO_CACHE and _PAGE_WRITETHRU
like in lpar. So we dont' really need a separate bit
for tracking _PAGE_COHERENCE.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Acked-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/include/asm/pte-hash64.h')
| -rw-r--r-- | arch/powerpc/include/asm/pte-hash64.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/include/asm/pte-hash64.h b/arch/powerpc/include/asm/pte-hash64.h index 0419eeb53274..55aea0caf95e 100644 --- a/arch/powerpc/include/asm/pte-hash64.h +++ b/arch/powerpc/include/asm/pte-hash64.h @@ -19,7 +19,7 @@ #define _PAGE_FILE 0x0002 /* (!present only) software: pte holds file offset */ #define _PAGE_EXEC 0x0004 /* No execute on POWER4 and newer (we invert) */ #define _PAGE_GUARDED 0x0008 -#define _PAGE_COHERENT 0x0010 /* M: enforce memory coherence (SMP systems) */ +/* We can derive Memory coherence from _PAGE_NO_CACHE */ #define _PAGE_NO_CACHE 0x0020 /* I: cache inhibit */ #define _PAGE_WRITETHRU 0x0040 /* W: cache write-through */ #define _PAGE_DIRTY 0x0080 /* C: page changed */ |