X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=arch%2Fsparc%2Fmm%2Fgeneric.c;h=1ef7fa03fefe74f7c98daa9bf71cbdcc5bdb3747;hb=43bc926fffd92024b46cafaf7350d669ba9ca884;hp=db27eee3bda19511b49f7b83c0fd472082319d46;hpb=cee37fe97739d85991964371c1f3a745c00dd236;p=linux-2.6.git

diff --git a/arch/sparc/mm/generic.c b/arch/sparc/mm/generic.c
index db27eee3b..1ef7fa03f 100644
--- a/arch/sparc/mm/generic.c
+++ b/arch/sparc/mm/generic.c
@@ -16,31 +16,6 @@
 #include <asm/cacheflush.h>
 #include <asm/tlbflush.h>
 
-static inline void forget_pte(pte_t page)
-{
-#if 0 /* old 2.4 code */
-	if (pte_none(page))
-		return;
-	if (pte_present(page)) {
-		unsigned long pfn = pte_pfn(page);
-		struct page *ptpage;
-		if (!pfn_valid(pfn))
-			return;
-		ptpage = pfn_to_page(pfn);
-		if (PageReserved(ptpage))
-			return;
-		page_cache_release(ptpage);
-		return;
-	}
-	swap_free(pte_to_swp_entry(page));
-#else
-	if (!pte_none(page)) {
-		printk("forget_pte: old mapping existed!\n");
-		BUG();
-	}
-#endif
-}
-
 /* Remap IO memory, the same way as remap_pfn_range(), but use
  * the obio memory space.
  *
@@ -57,10 +32,7 @@ static inline void io_remap_pte_range(struct mm_struct *mm, pte_t * pte, unsigne
 	if (end > PMD_SIZE)
 		end = PMD_SIZE;
 	do {
-		pte_t oldpage = *pte;
-		pte_clear(mm, address, pte);
-		set_pte(pte, mk_pte_io(offset, prot, space));
-		forget_pte(oldpage);
+		set_pte_at(mm, address, pte, mk_pte_io(offset, prot, space));
 		address += PAGE_SIZE;
 		offset += PAGE_SIZE;
 		pte++;
@@ -88,39 +60,8 @@ static inline int io_remap_pmd_range(struct mm_struct *mm, pmd_t * pmd, 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) {
-		pmd_t *pmd = pmd_alloc(current->mm, dir, from);
-		error = -ENOMEM;
-		if (!pmd)
-			break;
-		error = io_remap_pmd_range(mm, pmd, from, end - from, offset + from, prot, space);
-		if (error)
-			break;
-		from = (from + PGDIR_SIZE) & PGDIR_MASK;
-		dir++;
-	}
-	spin_unlock(&mm->page_table_lock);
-
-	flush_tlb_range(vma, beg, end);
-	return error;
-}
-
 int io_remap_pfn_range(struct vm_area_struct *vma, unsigned long from,
-			unsigned long pfn, unsigned long size, pgprot_t prot)
+		       unsigned long pfn, unsigned long size, pgprot_t prot)
 {
 	int error = 0;
 	pgd_t * dir;
@@ -130,14 +71,17 @@ int io_remap_pfn_range(struct vm_area_struct *vma, unsigned long from,
 	int space = GET_IOSPACE(pfn);
 	unsigned long offset = GET_PFN(pfn) << PAGE_SHIFT;
 
-	prot = __pgprot(pg_iobits);
+	/* See comment in mm/memory.c remap_pfn_range */
+	vma->vm_flags |= VM_IO | VM_RESERVED | VM_PFNMAP;
+	vma->vm_pgoff = (offset >> PAGE_SHIFT) |
+		((unsigned long)space << 28UL);
+
 	offset -= from;
 	dir = pgd_offset(mm, from);
 	flush_cache_range(vma, beg, end);
 
-	spin_lock(&mm->page_table_lock);
 	while (from < end) {
-		pmd_t *pmd = pmd_alloc(current->mm, dir, from);
+		pmd_t *pmd = pmd_alloc(mm, dir, from);
 		error = -ENOMEM;
 		if (!pmd)
 			break;
@@ -147,7 +91,6 @@ int io_remap_pfn_range(struct vm_area_struct *vma, unsigned long from,
 		from = (from + PGDIR_SIZE) & PGDIR_MASK;
 		dir++;
 	}
-	spin_unlock(&mm->page_table_lock);
 
 	flush_tlb_range(vma, beg, end);
 	return error;