uapi: fix big endian definition of ipv6_rpl_sr_hdr

Following RFC 6554 [1], the current order of fields is wrong for big
endian definition. Indeed, here is how the header looks like:

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|  Next Header  |  Hdr Ext Len  | Routing Type  | Segments Left |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| CmprI | CmprE |  Pad  |               Reserved                |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

This patch reorders fields so that big endian definition is now correct.

  [1] https://tools.ietf.org/html/rfc6554#section-3

Fixes: cfa933d938d8 ("include: uapi: linux: add rpl sr header definition")
Signed-off-by: Justin Iurman <justin.iurman@uliege.be>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/include/uapi/linux/rpl.h b/include/uapi/linux/rpl.h
index 1dccb55cf8c647baa1ffda34b9ff442259e8efea..708adddf9f1389c039d7f94f05bef00714034213 100644 (file)
--- a/include/uapi/linux/rpl.h
+++ b/include/uapi/linux/rpl.h
@@ -28,10 +28,10 @@ struct ipv6_rpl_sr_hdr {
                pad:4,
                reserved1:16;
 #elif defined(__BIG_ENDIAN_BITFIELD)
-       __u32   reserved:20,
+       __u32   cmpri:4,
+               cmpre:4,
                pad:4,
-               cmpri:4,
-               cmpre:4;
+               reserved:20;
 #else
 #error  "Please fix <asm/byteorder.h>"
 #endif