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net: clean up some sparse endianness warnings in ipv6.h 

sparse is throwing warnings when building sunrpc modules due to some
endianness shenanigans in ipv6.h. Specifically:

  CHECK   net/sunrpc/addr.c
include/net/ipv6.h:573:17: warning: restricted __be64 degrades to integer
include/net/ipv6.h:577:34: warning: restricted __be32 degrades to integer
include/net/ipv6.h:573:17: warning: restricted __be64 degrades to integer
include/net/ipv6.h:577:34: warning: restricted __be32 degrades to integer

Sprinkle some endianness fixups to silence them. These should all get
fixed up at compile time, so I don't think this will add any extra work
to be done at runtime.

Signed-off-by: Jeff Layton <jlayton@primarydata.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jeff Layton 2014-07-16 06:55:46 -04:00 committed by David S. Miller
parent e18a44590a
commit 1373a7739e
1 changed files with 11 additions and 6 deletions
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17
include/net/ipv6.h
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@ -558,24 +558,29 @@ static inline u32 __ipv6_addr_jhash(const struct in6_addr *a, const u32 initval)
static inline bool ipv6_addr_loopback(const struct in6_addr *a)
{
#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
const unsigned long *ul = (const unsigned long *)a;
const __be64 *be = (const __be64 *)a;
return (ul[0] | (ul[1] ^ cpu_to_be64(1))) == 0UL;
return (be[0] | (be[1] ^ cpu_to_be64(1))) == 0UL;
#else
return (a->s6_addr32[0] | a->s6_addr32[1] |
a->s6_addr32[2] | (a->s6_addr32[3] ^ htonl(1))) == 0;
a->s6_addr32[2] | (a->s6_addr32[3] ^ cpu_to_be32(1))) == 0;
#endif
}
/*
* Note that we must __force cast these to unsigned long to make sparse happy,
* since all of the endian-annotated types are fixed size regardless of arch.
*/
static inline bool ipv6_addr_v4mapped(const struct in6_addr *a)
{
return (
#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
*(__be64 *)a |
*(unsigned long *)a |
#else
(a->s6_addr32[0] | a->s6_addr32[1]) |
(__force unsigned long)(a->s6_addr32[0] | a->s6_addr32[1]) |
#endif
(a->s6_addr32[2] ^ htonl(0x0000ffff))) == 0UL;
(__force unsigned long)(a->s6_addr32[2] ^
cpu_to_be32(0x0000ffff))) == 0UL;
}
/*