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Commit 38675170 authored by YOSHIFUJI Hideaki / 吉藤英明's avatar YOSHIFUJI Hideaki / 吉藤英明 Committed by David S. Miller
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ipv6: 64bit version of ipv6_prefix_equal(). 



Signed-off-by: default avatarYOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 2ef97332

include/net/ipv6.h

+26 −0
Original line number Diff line number Diff line
@@ -399,6 +399,31 @@ static inline bool ipv6_addr_equal(const struct in6_addr *a1, 
#endif

}



#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64

static inline bool __ipv6_prefix_equal64_half(const __be64 *a1,

					      const __be64 *a2,

					      unsigned int len)

{

	if (len && ((*a1 ^ *a2) & cpu_to_be64(~0UL) << (64 - len)))

		return false;

	return true;

}



static inline bool ipv6_prefix_equal(const struct in6_addr *addr1,

				     const struct in6_addr *addr2,

				     unsigned int prefixlen)

{

	const __be64 *a1 = (const __be64 *)addr1;

	const __be64 *a2 = (const __be64 *)addr2;



	if (prefixlen >= 64) {

		if (a1[0] ^ a2[0])

			return false;

		return __ipv6_prefix_equal64_half(a1 + 1, a2 + 1, prefixlen - 64);

	}

	return __ipv6_prefix_equal64_half(a1, a2, prefixlen);

}

#else

static inline bool ipv6_prefix_equal(const struct in6_addr *addr1,

				     const struct in6_addr *addr2,

				     unsigned int prefixlen)
@@ -419,6 +444,7 @@ static inline bool ipv6_prefix_equal(const struct in6_addr *addr1, 


	return true;

}

#endif



struct inet_frag_queue;