sh: pmd rework.

Remove extra bits from the pmd structure and store a kernel logical
address rather than a physical address. This allows it to be directly
dereferenced. Another piece of wierdness inherited from x86.

Signed-off-by: Stuart Menefy <stuart.menefy@st.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 9 insertions, 17 deletions

diff --git a/arch/sh/mm/init.c b/arch/sh/mm/init.c
index 8c8d39118387..462bfeac6d9c 100644
--- a/arch/sh/mm/init.c
+++ b/arch/sh/mm/init.c
@@ -84,30 +84,22 @@ static void set_pte_phys(unsigned long addr, unsigned long phys, pgprot_t prot)
         pmd_t *pmd;
         pte_t *pte;
 
-        pgd = swapper_pg_dir + pgd_index(addr);
+        pgd = pgd_offset_k(addr);
         if (pgd_none(*pgd)) {
                 pgd_ERROR(*pgd);
                 return;
         }
 
-        pud = pud_offset(pgd, addr);
-        if (pud_none(*pud)) {
-                pmd = (pmd_t *)get_zeroed_page(GFP_ATOMIC);
-                set_pud(pud, __pud(__pa(pmd) | _PAGE_TABLE));
-                if (pmd != pmd_offset(pud, 0)) {
-                        pud_ERROR(*pud);
-                        return;
-                }
+        pud = pud_alloc(NULL, pgd, addr);
+        if (unlikely(!pud)) {
+                pud_ERROR(*pud);
+                return;
         }
 
-        pmd = pmd_offset(pud, addr);
-        if (pmd_none(*pmd)) {
-                pte = (pte_t *)get_zeroed_page(GFP_ATOMIC);
-                set_pmd(pmd, __pmd(__pa(pte) | _PAGE_TABLE));
-                if (pte != pte_offset_kernel(pmd, 0)) {
-                        pmd_ERROR(*pmd);
-                        return;
-                }
+        pmd = pmd_alloc(NULL, pud, addr);
+        if (unlikely(!pmd)) {
+                pmd_ERROR(*pmd);
+                return;
         }
 
         pte = pte_offset_kernel(pmd, addr);