include/net/ipv6.h:555:26: sparse: cast to restricted __be32

PATCH New Fengguang Wu 1 participant 1 message Jan 14, 2013 1 message not in the archive

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Fengguang Wu

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2013-01-14 02:56 UTC #1 lore raw

PATCH 126/134 include/net/ipv6.h:555:26: sparse: cast to restricted __be32

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.

Quoted 3 lines

Quoted 3 lines
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  /*

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