Fedora kernel-2.6.17-1.2142_FC4 patched with stable patch-2.6.17.4-vs2.0.2-rc26.diff

[linux-2.6.git] / arch / sparc64 / mm / generic.c

diff --git a/arch/sparc64/mm/generic.c b/arch/sparc64/mm/generic.c
index 6b31f61..8cb0620 100644 (file)
--- a/arch/sparc64/mm/generic.c
+++ b/arch/sparc64/mm/generic.c
@@ -39,24 +39,29 @@ static inline void io_remap_pte_range(struct mm_struct *mm, pte_t * pte,
                pte_t entry;
                unsigned long curend = address + PAGE_SIZE;
                
-               entry = mk_pte_io(offset, prot, space);
+               entry = mk_pte_io(offset, prot, space, PAGE_SIZE);
                if (!(address & 0xffff)) {
-                       if (!(address & 0x3fffff) && !(offset & 0x3ffffe) && end >= address + 0x400000) {
-                               entry = mk_pte_io(offset,
-                                                 __pgprot(pgprot_val (prot) | _PAGE_SZ4MB),
-                                                 space);
+                       if (PAGE_SIZE < (4 * 1024 * 1024) &&
+                           !(address & 0x3fffff) &&
+                           !(offset & 0x3ffffe) &&
+                           end >= address + 0x400000) {
+                               entry = mk_pte_io(offset, prot, space,
+                                                 4 * 1024 * 1024);
                                curend = address + 0x400000;
                                offset += 0x400000;
-                       } else if (!(address & 0x7ffff) && !(offset & 0x7fffe) && end >= address + 0x80000) {
-                               entry = mk_pte_io(offset,
-                                                 __pgprot(pgprot_val (prot) | _PAGE_SZ512K),
-                                                 space);
+                       } else if (PAGE_SIZE < (512 * 1024) &&
+                                  !(address & 0x7ffff) &&
+                                  !(offset & 0x7fffe) &&
+                                  end >= address + 0x80000) {
+                               entry = mk_pte_io(offset, prot, space,
+                                                 512 * 1024 * 1024);
                                curend = address + 0x80000;
                                offset += 0x80000;
-                       } else if (!(offset & 0xfffe) && end >= address + 0x10000) {
-                               entry = mk_pte_io(offset,
-                                                 __pgprot(pgprot_val (prot) | _PAGE_SZ64K),
-                                                 space);
+                       } else if (PAGE_SIZE < (64 * 1024) &&
+                                  !(offset & 0xfffe) &&
+                                  end >= address + 0x10000) {
+                               entry = mk_pte_io(offset, prot, space,
+                                                 64 * 1024);
                                curend = address + 0x10000;
                                offset += 0x10000;
                        } else
@@ -68,6 +73,7 @@ static inline void io_remap_pte_range(struct mm_struct *mm, pte_t * pte,
                        BUG_ON(!pte_none(*pte));
                        set_pte_at(mm, address, pte, entry);
                        address += PAGE_SIZE;
+                       pte_val(entry) += PAGE_SIZE;
                        pte++;
                } while (address < curend);
        } while (address < end);
@@ -116,37 +122,6 @@ static inline int io_remap_pud_range(struct mm_struct *mm, pud_t * pud, unsigned
        return 0;
 }
 
-int io_remap_page_range(struct vm_area_struct *vma, unsigned long from, unsigned long offset, unsigned long size, pgprot_t prot, int space)
-{
-       int error = 0;
-       pgd_t * dir;
-       unsigned long beg = from;
-       unsigned long end = from + size;
-       struct mm_struct *mm = vma->vm_mm;
-
-       prot = __pgprot(pg_iobits);
-       offset -= from;
-       dir = pgd_offset(mm, from);
-       flush_cache_range(vma, beg, end);
-
-       spin_lock(&mm->page_table_lock);
-       while (from < end) {
-               pud_t *pud = pud_alloc(mm, dir, from);
-               error = -ENOMEM;
-               if (!pud)
-                       break;
-               error = io_remap_pud_range(mm, pud, from, end - from, offset + from, prot, space);
-               if (error)
-                       break;
-               from = (from + PGDIR_SIZE) & PGDIR_MASK;
-               dir++;
-       }
-       flush_tlb_range(vma, beg, end);
-       spin_unlock(&mm->page_table_lock);
-
-       return error;
-}
-
 int io_remap_pfn_range(struct vm_area_struct *vma, unsigned long from,
                unsigned long pfn, unsigned long size, pgprot_t prot)
 {
@@ -157,15 +132,20 @@ int io_remap_pfn_range(struct vm_area_struct *vma, unsigned long from,
        struct mm_struct *mm = vma->vm_mm;
        int space = GET_IOSPACE(pfn);
        unsigned long offset = GET_PFN(pfn) << PAGE_SHIFT;
+       unsigned long phys_base;
+
+       phys_base = offset | (((unsigned long) space) << 32UL);
+
+       /* See comment in mm/memory.c remap_pfn_range */
+       vma->vm_flags |= VM_IO | VM_RESERVED | VM_PFNMAP;
+       vma->vm_pgoff = phys_base >> PAGE_SHIFT;
 
-       prot = __pgprot(pg_iobits);
        offset -= from;
        dir = pgd_offset(mm, from);
        flush_cache_range(vma, beg, end);
 
-       spin_lock(&mm->page_table_lock);
        while (from < end) {
-               pud_t *pud = pud_alloc(current->mm, dir, from);
+               pud_t *pud = pud_alloc(mm, dir, from);
                error = -ENOMEM;
                if (!pud)
                        break;
@@ -175,8 +155,7 @@ int io_remap_pfn_range(struct vm_area_struct *vma, unsigned long from,
                from = (from + PGDIR_SIZE) & PGDIR_MASK;
                dir++;
        }
-       flush_tlb_range(vma, beg, end);
-       spin_unlock(&mm->page_table_lock);
 
+       flush_tlb_range(vma, beg, end);
        return error;
 }