1 files changed, 2 insertions, 2 deletions

diff --git a/fs/ramfs/file-nommu.c b/fs/ramfs/file-nommu.c
index 99fffc9e1bfd..677139b48e00 100644
--- a/fs/ramfs/file-nommu.c
+++ b/fs/ramfs/file-nommu.c
@@ -283,9 +283,9 @@ unsigned long ramfs_nommu_get_unmapped_area(struct file *file,
 
 /*****************************************************************************/
 /*
- * set up a mapping
+ * set up a mapping for shared memory segments
  */
 int ramfs_nommu_mmap(struct file *file, struct vm_area_struct *vma)
 {
-        return 0;
+        return vma->vm_flags & VM_SHARED ? 0 : -ENOSYS;
 }