powerpc/mm/thp: Return pte address if we find trans_splitting.

For THP that is marked trans splitting, we return the pte.
This require the callers to handle the pmd_trans_splitting scenario,
if they care. All the current callers are either looking at pfn or
write_ok, hence we don't need to update them.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

1 files changed, 2 insertions, 10 deletions

diff --git a/arch/powerpc/include/asm/kvm_book3s_64.h b/arch/powerpc/include/asm/kvm_book3s_64.h
index 23b724c746e9..ce5610aa124c 100644
--- a/arch/powerpc/include/asm/kvm_book3s_64.h
+++ b/arch/powerpc/include/asm/kvm_book3s_64.h
@@ -281,11 +281,9 @@ static inline int hpte_cache_flags_ok(unsigned long ptel, unsigned long io_type)
 
 /*
  * If it's present and writable, atomically set dirty and referenced bits and
- * return the PTE, otherwise return 0. If we find a transparent hugepage
- * and if it is marked splitting we return 0;
+ * return the PTE, otherwise return 0.
  */
-static inline pte_t kvmppc_read_update_linux_pte(pte_t *ptep, int writing,
-                                                 unsigned int hugepage)
+static inline pte_t kvmppc_read_update_linux_pte(pte_t *ptep, int writing)
 {
         pte_t old_pte, new_pte = __pte(0);
 
@@ -301,12 +299,6 @@ static inline pte_t kvmppc_read_update_linux_pte(pte_t *ptep, int writing,
                         cpu_relax();
                         continue;
                 }
-#ifdef CONFIG_TRANSPARENT_HUGEPAGE
-                /* If hugepage and is trans splitting return None */
-                if (unlikely(hugepage &&
-                             pmd_trans_splitting(pte_pmd(old_pte))))
-                        return __pte(0);
-#endif
                 /* If pte is not present return None */
                 if (unlikely(!(pte_val(old_pte) & _PAGE_PRESENT)))
                         return __pte(0);