X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=mm%2Fmadvise.c;h=c8c01a12fea43719b034e6f394d8d72faa1aea16;hb=5d337b9194b1ce3b6fd5f3cb2799455ed2f9a3d1;hp=e3108054733c2530fd28114b4814e27eda106ac0;hpb=fb7a0e36532bc231bea8adfb1dddc3961eb38940;p=linux-2.6

diff --git a/mm/madvise.c b/mm/madvise.c
index e310805473..c8c01a12fe 100644
--- a/mm/madvise.c
+++ b/mm/madvise.c
@@ -65,7 +65,6 @@ static long madvise_behavior(struct vm_area_struct * vma,
 	/*
 	 * vm_flags is protected by the mmap_sem held in write mode.
 	 */
-	VM_ClearReadHint(vma);
 	vma->vm_flags = new_flags;
 
 out:
@@ -84,8 +83,10 @@ static long madvise_willneed(struct vm_area_struct * vma,
 {
 	struct file *file = vma->vm_file;
 
-	if (!file)
-		return -EBADF;
+	if (file->f_mapping->a_ops->get_xip_page) {
+		/* no bad return value, but ignore advice */
+		return 0;
+	}
 
 	*prev = vma;
 	start = ((start - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff;
@@ -136,11 +137,16 @@ static long madvise_dontneed(struct vm_area_struct * vma,
 	return 0;
 }
 
-static long madvise_vma(struct vm_area_struct *vma, struct vm_area_struct **prev,
-			unsigned long start, unsigned long end, int behavior)
+static long
+madvise_vma(struct vm_area_struct *vma, struct vm_area_struct **prev,
+		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:
@@ -161,6 +167,7 @@ static long madvise_vma(struct vm_area_struct *vma, struct vm_area_struct **prev
 		break;
 	}
 		
+out:
 	return error;
 }