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authorAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>2013-06-20 14:30:18 +0530
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2013-06-21 16:01:54 +1000
commit12bc9f6fc1d6582b4529ac522d2231bd2584a5f1 (patch)
tree40be8749c9b19e0e9dfddeee54436271dce2bb2f /arch/powerpc/mm/tlb_hash64.c
parentac52ae4721233150a3c30e9732a1c1f4f68e7db7 (diff)
powerpc: Replace find_linux_pte with find_linux_pte_or_hugepte
Replace find_linux_pte with find_linux_pte_or_hugepte and explicitly document why we don't need to handle transparent hugepages at callsites. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/mm/tlb_hash64.c')
-rw-r--r--arch/powerpc/mm/tlb_hash64.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/arch/powerpc/mm/tlb_hash64.c b/arch/powerpc/mm/tlb_hash64.c
index 48bf63ea6525..313c85c5aa90 100644
--- a/arch/powerpc/mm/tlb_hash64.c
+++ b/arch/powerpc/mm/tlb_hash64.c
@@ -189,6 +189,7 @@ void tlb_flush(struct mmu_gather *tlb)
void __flush_hash_table_range(struct mm_struct *mm, unsigned long start,
unsigned long end)
{
+ int hugepage_shift;
unsigned long flags;
start = _ALIGN_DOWN(start, PAGE_SIZE);
@@ -206,7 +207,8 @@ void __flush_hash_table_range(struct mm_struct *mm, unsigned long start,
local_irq_save(flags);
arch_enter_lazy_mmu_mode();
for (; start < end; start += PAGE_SIZE) {
- pte_t *ptep = find_linux_pte(mm->pgd, start);
+ pte_t *ptep = find_linux_pte_or_hugepte(mm->pgd, start,
+ &hugepage_shift);
unsigned long pte;
if (ptep == NULL)
@@ -214,7 +216,10 @@ void __flush_hash_table_range(struct mm_struct *mm, unsigned long start,
pte = pte_val(*ptep);
if (!(pte & _PAGE_HASHPTE))
continue;
- hpte_need_flush(mm, start, ptep, pte, 0);
+ if (unlikely(hugepage_shift && pmd_trans_huge(*(pmd_t *)pte)))
+ hpte_do_hugepage_flush(mm, start, (pmd_t *)pte);
+ else
+ hpte_need_flush(mm, start, ptep, pte, 0);
}
arch_leave_lazy_mmu_mode();
local_irq_restore(flags);