powerpc/mm: Convert virtual address to vpn

This patch convert different functions to take virtual page number
instead of virtual address. Virtual page number is virtual address
shifted right by VPN_SHIFT (12) bits. This enable us to have an
address range of upto 76 bits.

Reviewed-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 10 insertions, 8 deletions

diff --git a/arch/powerpc/include/asm/pte-hash64-64k.h b/arch/powerpc/include/asm/pte-hash64-64k.h
index 59247e816ac5..eedf427c9124 100644
--- a/arch/powerpc/include/asm/pte-hash64-64k.h
+++ b/arch/powerpc/include/asm/pte-hash64-64k.h
@@ -58,14 +58,16 @@
 /* Trick: we set __end to va + 64k, which happens works for
  * a 16M page as well as we want only one iteration
  */
-#define pte_iterate_hashed_subpages(rpte, psize, va, index, shift)          \
-        do {                                                                \
-                unsigned long __end = va + PAGE_SIZE;                       \
-                unsigned __split = (psize == MMU_PAGE_4K ||                 \
-                                    psize == MMU_PAGE_64K_AP);              \
-                shift = mmu_psize_defs[psize].shift;                        \
-                for (index = 0; va < __end; index++, va += (1L << shift)) { \
-                        if (!__split || __rpte_sub_valid(rpte, index)) do { \
+#define pte_iterate_hashed_subpages(rpte, psize, vpn, index, shift)     \
+        do {                                                            \
+                unsigned long __end = vpn + (1UL << (PAGE_SHIFT - VPN_SHIFT));  \
+                unsigned __split = (psize == MMU_PAGE_4K ||             \
+                                    psize == MMU_PAGE_64K_AP);          \
+                shift = mmu_psize_defs[psize].shift;                    \
+                for (index = 0; vpn < __end; index++,                   \
+                             vpn += (1L << (shift - VPN_SHIFT))) {      \
+                        if (!__split || __rpte_sub_valid(rpte, index))  \
+                                do {
 
 #define pte_iterate_hashed_end() } while(0); } } while(0)