Subject: [net-next:master 126/134] include/net/ipv6.h:555:26: sparse: cast to restricted __be32

From: Fengguang Wu <[email-masked]>
Date: Mon, 14 Jan 2013 10:55:59 +0800

Hi YOSHIFUJI,

FYI, there are new sparse warnings show up in

tree:   git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git master
head:   25d46f43a911b08c5aa8c8fd4fe7fa9b36445068
commit: 3e4e4c1f2da66b29ee9379ca29f8dd620c2b5a1f [126/134] ipv6: Introduce ip6_flow_hdr() to fill version, tclass and flowlabel.

>> include/net/ipv6.h:555:26: sparse: cast to restricted __be32
>> include/net/ipv6.h:555:63: sparse: restricted __be32 degrades to integer
>> include/net/ipv6.h:555:24: sparse: incorrect type in assignment (different base types)
   include/net/ipv6.h:555:24:    expected restricted __be32 [usertype] <noident>
   include/net/ipv6.h:555:24:    got unsigned int

vim +555 include/net/ipv6.h

971f359d YOSHIFUJI Hideaki            2005-11-08  549  /*
3e4e4c1f YOSHIFUJI Hideaki / 吉藤英明 2013-01-13  550   *	Header manipulation
3e4e4c1f YOSHIFUJI Hideaki / 吉藤英明 2013-01-13  551   */
3e4e4c1f YOSHIFUJI Hideaki / 吉藤英明 2013-01-13  552  static inline void ip6_flow_hdr(struct ipv6hdr *hdr, unsigned int tclass,
3e4e4c1f YOSHIFUJI Hideaki / 吉藤英明 2013-01-13  553  				__be32 flowlabel)
3e4e4c1f YOSHIFUJI Hideaki / 吉藤英明 2013-01-13  554  {
3e4e4c1f YOSHIFUJI Hideaki / 吉藤英明 2013-01-13 @555  	*(__be32 *)hdr = ntohl(0x60000000 | (tclass << 20)) | flowlabel;
3e4e4c1f YOSHIFUJI Hideaki / 吉藤英明 2013-01-13  556  }
3e4e4c1f YOSHIFUJI Hideaki / 吉藤英明 2013-01-13  557  
3e4e4c1f YOSHIFUJI Hideaki / 吉藤英明 2013-01-13  558  /*

---
0-DAY kernel build testing backend         Open Source Technology Center
Fengguang Wu, Yuanhan Liu                              Intel Corporation