powerpc/mm: Use the correct pointer when setting a 2MB pte

commit a0615a16f7d0ceb5804d295203c302d496d8ee91 upstream.

When setting a 2MB pte, radix__map_kernel_page() is using the address

	ptep = (pte_t *)pudp;

Fix this conversion to use pmdp instead. Use pmdp_ptep() to do this
instead of casting the pointer.

Fixes: 2bfd65e45e87 ("powerpc/mm/radix: Add radix callbacks for early init routines")
Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Reza Arbab <arbab@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/arch/powerpc/mm/pgtable-radix.c b/arch/powerpc/mm/pgtable-radix.c
index ebb7f46..9a25dce 100644 (file)
--- a/arch/powerpc/mm/pgtable-radix.c
+++ b/arch/powerpc/mm/pgtable-radix.c
@@ -65,7 +65,7 @@ int radix__map_kernel_page(unsigned long ea, unsigned long pa,
                if (!pmdp)
                        return -ENOMEM;
                if (map_page_size == PMD_SIZE) {
-                       ptep = (pte_t *)pudp;
+                       ptep = pmdp_ptep(pmdp);
                        goto set_the_pte;
                }
                ptep = pte_alloc_kernel(pmdp, ea);
@@ -90,7 +90,7 @@ int radix__map_kernel_page(unsigned long ea, unsigned long pa,
                }
                pmdp = pmd_offset(pudp, ea);
                if (map_page_size == PMD_SIZE) {
-                       ptep = (pte_t *)pudp;
+                       ptep = pmdp_ptep(pmdp);
                        goto set_the_pte;
                }
                if (!pmd_present(*pmdp)) {