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Subject[RFC v6 07/62] powerpc: use helper functions in __hash_page_huge() for 64K PTE
Date
replace redundant code in __hash_page_huge() with helper
functions pte_get_hash_gslot() and pte_set_hash_slot()

Signed-off-by: Ram Pai <linuxram@us.ibm.com>
---
arch/powerpc/mm/hugetlbpage-hash64.c | 24 ++++--------------------
1 files changed, 4 insertions(+), 20 deletions(-)

diff --git a/arch/powerpc/mm/hugetlbpage-hash64.c b/arch/powerpc/mm/hugetlbpage-hash64.c
index 6f7aee3..e6dcd50 100644
--- a/arch/powerpc/mm/hugetlbpage-hash64.c
+++ b/arch/powerpc/mm/hugetlbpage-hash64.c
@@ -23,7 +23,6 @@ int __hash_page_huge(unsigned long ea, unsigned long access, unsigned long vsid,
int ssize, unsigned int shift, unsigned int mmu_psize)
{
real_pte_t rpte;
- unsigned long *hidxp;
unsigned long vpn;
unsigned long old_pte, new_pte;
unsigned long rflags, pa, sz;
@@ -74,16 +73,10 @@ int __hash_page_huge(unsigned long ea, unsigned long access, unsigned long vsid,
/* Check if pte already has an hpte (case 2) */
if (unlikely(old_pte & H_PAGE_HASHPTE)) {
/* There MIGHT be an HPTE for this pte */
- unsigned long hash, slot, hidx;
+ unsigned long gslot;

- hash = hpt_hash(vpn, shift, ssize);
- hidx = __rpte_to_hidx(rpte, 0);
- if (hidx & _PTEIDX_SECONDARY)
- hash = ~hash;
- slot = (hash & htab_hash_mask) * HPTES_PER_GROUP;
- slot += hidx & _PTEIDX_GROUP_IX;
-
- if (mmu_hash_ops.hpte_updatepp(slot, rflags, vpn, mmu_psize,
+ gslot = pte_get_hash_gslot(vpn, shift, ssize, rpte, 0);
+ if (mmu_hash_ops.hpte_updatepp(gslot, rflags, vpn, mmu_psize,
mmu_psize, ssize, flags) == -1)
old_pte &= ~_PAGE_HPTEFLAGS;
}
@@ -110,16 +103,7 @@ int __hash_page_huge(unsigned long ea, unsigned long access, unsigned long vsid,
return -1;
}

- /*
- * Insert slot number & secondary bit in PTE second half.
- */
- hidxp = (unsigned long *)(ptep + PTRS_PER_PTE);
- rpte.hidx &= ~(0xfUL);
- *hidxp = rpte.hidx | (slot & 0xfUL);
- /*
- * check __real_pte for details on matching smp_rmb()
- */
- smp_wmb();
+ new_pte |= pte_set_hash_slot(ptep, rpte, 0, slot);
}

/*
--
1.7.1
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