2 files changed, 48 insertions, 0 deletions

diff --git a/mm/mmap.c b/mm/mmap.c
index f1b4448626bf..75557c639ad4 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -1088,6 +1088,30 @@ out:
         return retval;
 }
 
+#ifdef __ARCH_WANT_SYS_OLD_MMAP
+struct mmap_arg_struct {
+        unsigned long addr;
+        unsigned long len;
+        unsigned long prot;
+        unsigned long flags;
+        unsigned long fd;
+        unsigned long offset;
+};
+
+SYSCALL_DEFINE1(old_mmap, struct mmap_arg_struct __user *, arg)
+{
+        struct mmap_arg_struct a;
+
+        if (copy_from_user(&a, arg, sizeof(a)))
+                return -EFAULT;
+        if (a.offset & ~PAGE_MASK)
+                return -EINVAL;
+
+        return sys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd,
+                              a.offset >> PAGE_SHIFT);
+}
+#endif /* __ARCH_WANT_SYS_OLD_MMAP */
+
 /*
  * Some shared mappigns will want the pages marked read-only
  * to track write events. If so, we'll downgrade vm_page_prot
diff --git a/mm/nommu.c b/mm/nommu.c
index b9b5cceb1b68..605ace8982a8 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -1428,6 +1428,30 @@ out:
         return retval;
 }
 
+#ifdef __ARCH_WANT_SYS_OLD_MMAP
+struct mmap_arg_struct {
+        unsigned long addr;
+        unsigned long len;
+        unsigned long prot;
+        unsigned long flags;
+        unsigned long fd;
+        unsigned long offset;
+};
+
+SYSCALL_DEFINE1(old_mmap, struct mmap_arg_struct __user *, arg)
+{
+        struct mmap_arg_struct a;
+
+        if (copy_from_user(&a, arg, sizeof(a)))
+                return -EFAULT;
+        if (a.offset & ~PAGE_MASK)
+                return -EINVAL;
+
+        return sys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd,
+                              a.offset >> PAGE_SHIFT);
+}
+#endif /* __ARCH_WANT_SYS_OLD_MMAP */
+
 /*
  * split a vma into two pieces at address 'addr', a new vma is allocated either
  * for the first part or the tail.