2 files changed, 20 insertions, 0 deletions

diff --git a/include/linux/Kbuild b/include/linux/Kbuild
index 2c2b6fc91e30..d61983db4149 100644
--- a/include/linux/Kbuild
+++ b/include/linux/Kbuild
@@ -45,6 +45,7 @@ header-y += coda_psdev.h
 header-y += coff.h
 header-y += comstats.h
 header-y += consolemap.h
+header-y += const.h
 header-y += cycx_cfm.h
 header-y += dlm_device.h
 header-y += dm-ioctl.h
diff --git a/include/linux/const.h b/include/linux/const.h
new file mode 100644
index 000000000000..07b300bfe34b
--- /dev/null
+++ b/include/linux/const.h
@@ -0,0 +1,19 @@
+/* const.h: Macros for dealing with constants.  */
+
+#ifndef _LINUX_CONST_H
+#define _LINUX_CONST_H
+
+/* Some constant macros are used in both assembler and
+ * C code.  Therefore we cannot annotate them always with
+ * 'UL' and other type specifiers unilaterally.  We
+ * use the following macros to deal with this.
+ */
+
+#ifdef __ASSEMBLY__
+#define _AC(X,Y)        X
+#else
+#define __AC(X,Y)       (X##Y)
+#define _AC(X,Y)        __AC(X,Y)
+#endif
+
+#endif /* !(_LINUX_CONST_H) */