[PATCH] validation: add check for typeof() and address spaces

The typeof() key word should preserve the address space and
typeof_unqual() should not.  Add a check to verify this works as
expected.

Signed-off-by: Dan Carpenter <[email protected]>
---
 validation/typeof-as.c | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)
 create mode 100644 validation/typeof-as.c

diff --git a/validation/typeof-as.c b/validation/typeof-as.c
new file mode 100644
index 000000000000..563685281d92
--- /dev/null
+++ b/validation/typeof-as.c
@@ -0,0 +1,32 @@
+#define __seg_gs		__attribute__((address_space(__seg_gs)))
+static int __seg_gs m;
+
+static int __seg_gs bad_manual (void)
+{
+	return (*(int *)&m);
+}
+
+static int __seg_gs good_manual (void)
+{
+	return (*(int __seg_gs *)&m);
+}
+
+static int bad_typeof (void)
+{
+	return (*(typeof_unqual(m) *)&m);
+}
+
+static int __seg_gs good_typeof (void)
+{
+	return (*(volatile typeof(m) *)&m);
+}
+
+/*
+ * check-name: typeof address space
+ * check-command: ./sparse typeof-as.c
+ *
+ * check-error-start
+typeof-as.c:6:19: warning: cast removes address space '__seg_gs' of expression
+typeof-as.c:16:19: warning: cast removes address space '__seg_gs' of expression
+ * check-error-end
+ */
-- 
2.51.0