Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / include / linux / pfn.h

diff --git a/kernel/include/linux/pfn.h b/kernel/include/linux/pfn.h
new file mode 100644 (file)
index 0000000..7646637
--- /dev/null
+++ b/kernel/include/linux/pfn.h
@@ -0,0 +1,13 @@
+#ifndef _LINUX_PFN_H_
+#define _LINUX_PFN_H_
+
+#ifndef __ASSEMBLY__
+#include <linux/types.h>
+#endif
+
+#define PFN_ALIGN(x)   (((unsigned long)(x) + (PAGE_SIZE - 1)) & PAGE_MASK)
+#define PFN_UP(x)      (((x) + PAGE_SIZE-1) >> PAGE_SHIFT)
+#define PFN_DOWN(x)    ((x) >> PAGE_SHIFT)
+#define PFN_PHYS(x)    ((phys_addr_t)(x) << PAGE_SHIFT)
+
+#endif