1 files changed, 2 insertions, 1 deletions

diff --git a/include/linux/ioport.h b/include/linux/ioport.h
index 589e0e75efae..85ac9b9b72a2 100644
--- a/include/linux/ioport.h
+++ b/include/linux/ioport.h
@@ -29,8 +29,9 @@ struct resource {
 #define IORESOURCE_BITS         0x000000ff      /* Bus-specific bits */
 
 #define IORESOURCE_TYPE_BITS    0x00001f00      /* Resource type */
-#define IORESOURCE_IO           0x00000100
+#define IORESOURCE_IO           0x00000100      /* PCI/ISA I/O ports */
 #define IORESOURCE_MEM          0x00000200
+#define IORESOURCE_REG          0x00000300      /* Register offsets */
 #define IORESOURCE_IRQ          0x00000400
 #define IORESOURCE_DMA          0x00000800
 #define IORESOURCE_BUS          0x00001000