Subject: [PATCH 1/2] can: Add constants containing length of CAN identifiers

From: Rostislav Lisovy <[email-masked]>
Date: Mon, 4 Jun 2012 18:09:35 +0200

The necessary information might be determined out of the CAN_*_MASK,
however it is undesirable to misuse masks for such purpose.

Signed-off-by: Rostislav Lisovy <[email-masked]>
---
 include/linux/can.h |    3 +++
 1 file changed, 3 insertions(+)

diff --git a/include/linux/can.h b/include/linux/can.h
index 9a19bcb..08d1610 100644
--- a/include/linux/can.h
+++ b/include/linux/can.h
@@ -38,6 +38,9 @@
  */
 typedef __u32 canid_t;
 
+#define CAN_SFF_ID_BITS		11
+#define CAN_EFF_ID_BITS		29
+
 /*
  * Controller Area Network Error Frame Mask structure
  *
-- 
1.7.9.5