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-rw-r--r--mm/nommu.c24
1 files changed, 24 insertions, 0 deletions
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.