Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc

* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
  powerpc: Fix address masking bug in hpte_need_flush()

1 files changed, 9 insertions, 3 deletions

diff --git a/arch/powerpc/mm/tlb_hash64.c b/arch/powerpc/mm/tlb_hash64.c
index 282d9306361f..1ec06576f619 100644
--- a/arch/powerpc/mm/tlb_hash64.c
+++ b/arch/powerpc/mm/tlb_hash64.c
@@ -63,15 +63,21 @@ void hpte_need_flush(struct mm_struct *mm, unsigned long addr,
         if (huge) {
 #ifdef CONFIG_HUGETLB_PAGE
                 psize = get_slice_psize(mm, addr);
+                /* Mask the address for the correct page size */
+                addr &= ~((1UL << mmu_psize_defs[psize].shift) - 1);
 #else
                 BUG();
                 psize = pte_pagesize_index(mm, addr, pte); /* shutup gcc */
 #endif
-        } else
+        } else {
                 psize = pte_pagesize_index(mm, addr, pte);
+                /* Mask the address for the standard page size.  If we
+                 * have a 64k page kernel, but the hardware does not
+                 * support 64k pages, this might be different from the
+                 * hardware page size encoded in the slice table. */
+                addr &= PAGE_MASK;
+        }
 
-        /* Mask the address for the correct page size */
-        addr &= ~((1UL << mmu_psize_defs[psize].shift) - 1);
 
         /* Build full vaddr */
         if (!is_kernel_addr(addr)) {