patch-2.4.0-test10 linux/mm/mremap.c

• Lines: 47
• Date: Wed Oct 18 14:25:46 2000
• Orig file: v2.4.0-test9/linux/mm/mremap.c
• Orig date: Sun Oct 8 10:50:38 2000

diff -u --recursive --new-file v2.4.0-test9/linux/mm/mremap.c linux/mm/mremap.c
@@ -63,14 +63,14 @@
 	pte_t pte;
 
 	spin_lock(&mm->page_table_lock);
-	pte = *src;
-	if (!pte_none(pte)) {
-		error++;
-		if (dst) {
-			pte_clear(src);
-			set_pte(dst, pte);
-			error--;
+	if (!pte_none(*src)) {
+		pte = ptep_get_and_clear(src);
+		if (!dst) {
+			/* No dest?  We must put it back. */
+			dst = src;
+			error++;
 		}
+		set_pte(dst, pte);
 	}
 	spin_unlock(&mm->page_table_lock);
 	return error;
@@ -141,10 +141,10 @@
 				get_file(new_vma->vm_file);
 			if (new_vma->vm_ops && new_vma->vm_ops->open)
 				new_vma->vm_ops->open(new_vma);
-			vmlist_modify_lock(current->mm);
+			spin_lock(&current->mm->page_table_lock);
 			insert_vm_struct(current->mm, new_vma);
 			merge_segments(current->mm, new_vma->vm_start, new_vma->vm_end);
-			vmlist_modify_unlock(current->mm);
+			spin_unlock(&current->mm->page_table_lock);
 			do_munmap(current->mm, addr, old_len);
 			current->mm->total_vm += new_len >> PAGE_SHIFT;
 			if (new_vma->vm_flags & VM_LOCKED) {
@@ -258,9 +258,9 @@
 		/* can we just expand the current mapping? */
 		if (max_addr - addr >= new_len) {
 			int pages = (new_len - old_len) >> PAGE_SHIFT;
-			vmlist_modify_lock(vma->vm_mm);
+			spin_lock(&vma->vm_mm->page_table_lock);
 			vma->vm_end = addr + new_len;
-			vmlist_modify_unlock(vma->vm_mm);
+			spin_unlock(&vma->vm_mm->page_table_lock);
 			current->mm->total_vm += pages;
 			if (vma->vm_flags & VM_LOCKED) {
 				current->mm->locked_vm += pages;