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powerpc/mm: Free up _PAGE_COHERENCE for numa fault use later

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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>
This commit is contained in:
Aneesh Kumar K.V
2013-11-18 14:58:10 +05:30
committed by Benjamin Herrenschmidt
parent 92c08a0d52
commit c8c06f5a0d
5 changed files with 26 additions and 8 deletions
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4
arch/powerpc/mm/hugetlbpage-hash64.c
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@@ -99,6 +99,10 @@ int __hash_page_huge(unsigned long ea, unsigned long access, unsigned long vsid,
/* Add in WIMG bits */
rflags |= (new_pte & (_PAGE_WRITETHRU | _PAGE_NO_CACHE |
_PAGE_COHERENT | _PAGE_GUARDED));
/*
* enable the memory coherence always
*/
rflags |= HPTE_R_M;
slot = hpte_insert_repeating(hash, vpn, pa, rflags, 0,
mmu_psize, ssize);