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linux-2.6/net
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Shan Wei f7c83bcbfa net: xfrm: use __this_cpu_read per-cpu helper 
this_cpu_ptr/this_cpu_read is faster than per_cpu_ptr(p, smp_processor_id())
and can reduce  memory accesses.
The latter helper needs to find the offset for current cpu,
and needs more assembler instructions which objdump shows in following.

this_cpu_ptr relocates and address. this_cpu_read() relocates the address
and performs the fetch. this_cpu_read() saves you more instructions
since it can do the relocation and the fetch in one instruction.

per_cpu_ptr(p, smp_processor_id())：
  1e:   65 8b 04 25 00 00 00 00         mov    %gs:0x0,%eax
  26:   48 98                           cltq
  28:   31 f6                           xor    %esi,%esi
  2a:   48 c7 c7 00 00 00 00            mov    $0x0,%rdi
  31:   48 8b 04 c5 00 00 00 00         mov    0x0(,%rax,8),%rax
  39:   c7 44 10 04 14 00 00 00         movl   $0x14,0x4(%rax,%rdx,1)

this_cpu_ptr(p)
  1e:   65 48 03 14 25 00 00 00 00      add    %gs:0x0,%rdx
  27:   31 f6                           xor    %esi,%esi
  29:   c7 42 04 14 00 00 00            movl   $0x14,0x4(%rdx)
  30:   48 c7 c7 00 00 00 00            mov    $0x0,%rdi

Signed-off-by: Shan Wei <davidshan@tencent.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
 		2012-11-13 14:38:52 +01:00
..
9p The following changes since commit 4cbe5a555fa58a79b6ecbb6c531b8bab0650778d: 2012-10-12 09:59:23 +09:00
802 tokenring: delete all remaining driver support 2012-05-15 20:23:16 -04:00
8021q vlan: use IS_ENABLED() 2012-11-01 12:41:35 -04:00
appletalk userns: Print out socket uids in a user namespace aware fashion. 2012-08-14 21:48:06 -07:00
atm net🏧fix up ENOIOCTLCMD error handling 2012-08-31 16:14:33 -04:00
ax25 userns: Convert net/ax25 to use kuid_t where appropriate 2012-08-14 21:49:42 -07:00
batman-adv batman-adv: enable fast client detection using unicast_4addr packets 2012-11-07 20:00:24 +01:00
bluetooth userns: Properly print bluetooth socket uids 2012-10-12 13:16:47 -07:00
bridge bridge: Avoid 'statement with no effect' compiler warnings 2012-11-04 01:59:29 -04:00
caif caif: move the dereference below the NULL test 2012-09-10 16:13:31 -04:00
can sections: fix section conflicts in net/can 2012-10-06 03:04:45 +09:00
ceph Merge branch 'modules-next' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux 2012-10-14 13:39:34 -07:00
core net: fix bridge notify hook to manage flags correctly 2012-11-03 15:37:36 -04:00
dcb netlink: Rename pid to portid to avoid confusion 2012-09-10 15:30:41 -04:00
dccp tcp: better retrans tracking for defer-accept 2012-11-03 14:45:00 -04:00
decnet sections: fix section conflicts in net 2012-10-06 03:04:45 +09:00
dns_resolver Merge branch 'modules-next' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux 2012-10-14 13:39:34 -07:00
dsa workqueue: deprecate flush[_delayed]_work_sync() 2012-08-20 14:51:24 -07:00
ethernet ipx: move peII functions 2012-07-19 10:48:00 -07:00
ieee802154 net/ieee802154/6lowpan.c: Remove unecessary semicolon 2012-09-18 16:08:19 -04:00
ipv4 tcp: better retrans tracking for defer-accept 2012-11-03 14:45:00 -04:00
ipv6 ndisc: fix a typo in a comment in ndisc_recv_na() 2012-11-07 19:03:16 -05:00
ipx userns: Print out socket uids in a user namespace aware fashion. 2012-08-14 21:48:06 -07:00
irda silence some noisy printks in irda 2012-10-04 15:53:48 -04:00
iucv net: remove skb_orphan_try() 2012-06-15 15:30:15 -07:00
key net/key/af_key.c: add range checks on ->sadb_x_policy_len 2012-10-01 17:15:06 -04:00
l2tp l2tp: session is an array not a pointer 2012-10-26 03:46:41 -04:00
lapb lapb: Neaten debugging 2012-05-17 18:45:20 -04:00
llc Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2012-10-02 11:11:09 -07:00
mac80211 mac80211: use ieee80211_free_txskb to fix possible skb leaks 2012-10-08 15:06:05 -04:00
mac802154 mac802154: sparse warnings: make symbols static 2012-07-12 07:54:45 -07:00
netfilter Merge branch 'master' of git://1984.lsi.us.es/nf-next 2012-10-26 14:40:55 -04:00
netlabel Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2012-10-02 13:38:27 -07:00
netlink netlink: use kfree_rcu() in netlink_release() 2012-10-18 15:34:30 -04:00
netrom net: change return values from -EACCES to -EPERM 2012-09-21 13:58:08 -04:00
nfc Remove noisy printks from llcp_sock_connect 2012-10-04 15:58:47 -04:00
openvswitch net/openvswitch/vport.c: Remove unecessary semicolon 2012-09-18 16:08:19 -04:00
packet packet: tx_ring: allow the user to choose tx data offset 2012-11-07 18:54:30 -05:00
phonet netlink: Rename pid to portid to avoid confusion 2012-09-10 15:30:41 -04:00
rds RDS: fix rds-ping spinlock recursion 2012-10-09 13:57:23 -04:00
rfkill Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2012-10-02 13:38:27 -07:00
rose net: Convert all sysctl registrations to register_net_sysctl 2012-04-20 21:22:30 -04:00
rxrpc Merge branch 'modules-next' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux 2012-10-14 13:39:34 -07:00
sched htb: fix two bugs 2012-11-06 19:06:29 -05:00
sctp sctp: Clean up type-punning in sctp_cmd_t union 2012-11-03 14:54:55 -04:00
sunrpc Merge branch 'for-3.7' of git://linux-nfs.org/~bfields/linux 2012-10-13 10:53:54 +09:00
tipc tipc: prevent dropped connections due to rcvbuf overflow 2012-10-04 15:53:48 -04:00
unix sock-diag: Report shutdown for inet and unix sockets (v2) 2012-10-23 14:57:52 -04:00
wanrouter wanmain: comparing array with NULL 2012-07-24 13:55:21 -07:00
wimax net: cleanup unsigned to unsigned int 2012-04-15 12:44:40 -04:00
wireless Merge branch 'for-davem' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next 2012-09-30 02:30:16 -04:00
x25 net: Fix (nearly-)kernel-doc comments for various functions 2012-07-10 23:13:45 -07:00
xfrm net: xfrm: use __this_cpu_read per-cpu helper 2012-11-13 14:38:52 +01:00
Kconfig net: Add INET dependency on aes crypto for the sake of TCP fastopen. 2012-09-04 14:20:14 -04:00
Makefile econet: remove ancient bug ridden protocol 2012-05-18 01:35:08 -04:00
compat.c make get_file() return its argument 2012-09-26 21:10:25 -04:00
nonet.c
…
socket.c cgroup: net_cls: Rework update socket logic 2012-10-26 03:40:51 -04:00
sysctl_net.c net: delete all instances of special processing for token ring 2012-05-15 20:14:35 -04:00