Patch to fix madvise() syscall to return -EBADF on non-file mapped regions.

Signed Off by: Suzuki K P <suzuki@in.ibm.com>

--- mm/madvise.c	2005-07-01 16:08:26.000000000 +0530
+++ mm/madvise.c.new	2005-07-01 16:07:45.000000000 +0530
@@ -62,9 +62,6 @@ static long madvise_willneed(struct vm_a
 {
 	struct file *file = vma->vm_file;
 
-	if (!file)
-		return -EBADF;
-
 	start = ((start - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff;
 	if (end > vma->vm_end)
 		end = vma->vm_end;
@@ -114,8 +111,12 @@ static long madvise_dontneed(struct vm_a
 static long madvise_vma(struct vm_area_struct * vma, unsigned long start,
 			unsigned long end, int behavior)
 {
+	struct file* filp = vma->vm_file;
 	long error = -EBADF;
 
+	if(!filp)
+		goto  out;
+
 	switch (behavior) {
 	case MADV_NORMAL:
 	case MADV_SEQUENTIAL:
@@ -136,6 +137,7 @@ static long madvise_vma(struct vm_area_s
 		break;
 	}
 		
+out:	
 	return error;
 }