From: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
To: davem@davemloft.net, netdev@vger.kernel.org
Cc: yoshfuji@linux-ipv6.org
Subject: [PATCH net-next 3/5] ipv6: Optimize ipv6_addr_is_solict_mult().
Date: Mon, 21 Jan 2013 02:39:07 +0900 [thread overview]
Message-ID: <50FC2BBB.6040404@linux-ipv6.org> (raw)
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
---
include/net/addrconf.h | 15 +++++++++++----
1 file changed, 11 insertions(+), 4 deletions(-)
diff --git a/include/net/addrconf.h b/include/net/addrconf.h
index 3a3eeb4..9dc5efc 100644
--- a/include/net/addrconf.h
+++ b/include/net/addrconf.h
@@ -307,10 +307,17 @@ static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr)
static inline bool ipv6_addr_is_solict_mult(const struct in6_addr *addr)
{
- return (addr->s6_addr32[0] == htonl(0xff020000) &&
- addr->s6_addr32[1] == htonl(0x00000000) &&
- addr->s6_addr32[2] == htonl(0x00000001) &&
- addr->s6_addr[12] == 0xff);
+#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64
+ __u64 *p = (__u64 *)addr;
+ return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) |
+ ((p[1] ^ cpu_to_be64(0x00000001ff000000UL)) &
+ cpu_to_be64(0xffffffffff000000UL))) == 0UL;
+#else
+ return ((addr->s6_addr32[0] ^ htonl(0xff020000)) |
+ addr->s6_addr32[1] |
+ (addr->s6_addr32[2] ^ htonl(0x00000001)) |
+ (addr->s6_addr[12] ^ 0xff)) == 0;
+#endif
}
#ifdef CONFIG_PROC_FS
--
1.7.9.5
reply other threads:[~2013-01-20 17:39 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=50FC2BBB.6040404@linux-ipv6.org \
--to=yoshfuji@linux-ipv6.org \
--cc=davem@davemloft.net \
--cc=netdev@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.