Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / include / uapi / linux / const.h

diff --git a/kernel/include/uapi/linux/const.h b/kernel/include/uapi/linux/const.h
new file mode 100644 (file)
index 0000000..c872bfd
--- /dev/null
+++ b/kernel/include/uapi/linux/const.h
@@ -0,0 +1,27 @@
+/* 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.
+ *
+ * Similarly, _AT() will cast an expression with a type in C, but
+ * leave it unchanged in asm.
+ */
+
+#ifdef __ASSEMBLY__
+#define _AC(X,Y)       X
+#define _AT(T,X)       X
+#else
+#define __AC(X,Y)      (X##Y)
+#define _AC(X,Y)       __AC(X,Y)
+#define _AT(T,X)       ((T)(X))
+#endif
+
+#define _BITUL(x)      (_AC(1,UL) << (x))
+#define _BITULL(x)     (_AC(1,ULL) << (x))
+
+#endif /* !(_LINUX_CONST_H) */