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Eric Dumazet 21371f768b [SOCK] Avoid divides in sk_stream_pages() and __sk_stream_mem_reclaim() 
sk_forward_alloc being signed, we should take care of divides by
SK_STREAM_MEM_QUANTUM we do in sk_stream_pages() and
__sk_stream_mem_reclaim()

This patchs introduces SK_STREAM_MEM_QUANTUM_SHIFT, defined
as ilog2(SK_STREAM_MEM_QUANTUM), to be able to use right
shifts instead of plain divides.

This should help compiler to choose right shifts instead of
expensive divides (as seen with CONFIG_CC_OPTIMIZE_FOR_SIZE=y on x86)

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28 15:00:05 -08:00
..
9p Use helpers to obtain task pid in printks 2007-10-19 11:53:43 -07:00
bluetooth [NET]: Remove FASTCALL macro 2008-01-28 14:57:23 -08:00
irda [NET] include/net/: Spelling fixes 2007-12-20 13:56:32 -08:00
iucv [AF_IUCV]: postpone receival of iucv-packets 2007-10-10 16:54:51 -07:00
netfilter [NETFILTER]: Introduce nf_inet_address 2008-01-28 14:59:07 -08:00
netns [IPV4]: Move the devinet pointers on the struct net 2008-01-28 14:58:11 -08:00
sctp [SCTP]: Implement ADD-IP special case processing for ABORT chunk 2008-01-28 14:59:24 -08:00
tc_act [PKT_SCHED]: Add stateless NAT 2007-10-10 16:53:11 -07:00
tipc
act_api.h [NET_SCHED]: Kill CONFIG_NET_CLS_POLICE 2007-07-15 00:03:05 -07:00
addrconf.h [IPV4] include/net: Use ipv4_is_<type> 2008-01-28 14:58:14 -08:00
af_rxrpc.h
af_unix.h [AF_UNIX]: Remove unused declaration of sysctl_unix_max_dgram_qlen. 2008-01-28 14:57:13 -08:00
ah.h [IPSEC]: Get rid of ipv6_{auth,esp,comp}_hdr 2007-10-10 16:55:55 -07:00
arp.h [IPV4]: Pass the net pointer to the arp_req_set_proxy() 2008-01-28 14:58:09 -08:00
atmclip.h
ax25.h [NET] include/net/: Spelling fixes 2007-12-20 13:56:32 -08:00
ax88796.h ax88796: add 93cx6 eeprom support 2007-10-10 16:53:56 -07:00
cfg80211.h cfg80211/nl80211: implement station attribute retrieval 2008-01-28 14:59:52 -08:00
checksum.h [NET]: Move netfilter checksum helpers to net/core/utils.c 2008-01-28 14:55:14 -08:00
cipso_ipv4.h
compat.h
datalink.h
dn.h [DECNET]: Another unnecessary net/tcp.h inclusion in net/dn.h 2007-07-10 23:02:12 -07:00
dn_dev.h
dn_fib.h
dn_neigh.h
dn_nsp.h
dn_route.h [NET]: Wrap netdevice hardware header creation. 2007-10-10 16:52:50 -07:00
dsfield.h [NET]: Constify include/net/dsfield.h 2008-01-28 14:55:58 -08:00
dst.h [IPSEC]: Add ICMP host relookup support 2008-01-28 14:57:23 -08:00
esp.h cleanup asm/scatterlist.h includes 2007-11-02 08:47:06 +01:00
fib_rules.h [IPV6]: Make fib6_rules_init to return an error code. 2008-01-28 14:56:46 -08:00
flow.h
gen_stats.h
genetlink.h [GENETLINK]: Dynamic multicast groups. 2007-07-18 15:47:52 -07:00
icmp.h [IPV4]: Add ICMPMsgStats MIB (RFC 4293) 2007-10-10 16:51:28 -07:00
ieee80211.h ieee80211: Stop net_ratelimit/IEEE80211_DEBUG_DROP log pollution 2007-11-20 16:43:17 -05:00
ieee80211_crypt.h
ieee80211_radiotap.h [MAC80211]: Add get_unaligned to ieee80211_get_radiotap_len 2007-10-10 16:47:40 -07:00
ieee80211softmac.h [IEEE80211]: Fix softmac lockdep reports. 2007-10-10 16:52:22 -07:00
ieee80211softmac_wx.h
if_inet6.h IPoIB: improve IPv4/IPv6 to IB mcast mapping functions 2008-01-25 14:15:37 -08:00
inet6_connection_sock.h
inet6_hashtables.h
inet_common.h [INET]: Remove leftover prototypes from include/net/inet_common.h 2007-11-12 21:02:51 -08:00
inet_connection_sock.h
inet_ecn.h [INET]: Give outer DSCP directly to ip*_copy_dscp 2008-01-28 14:53:45 -08:00
inet_frag.h [INET]: Remove no longer needed ->equal callback 2007-10-17 19:47:56 -07:00
inet_hashtables.h [INET]: Uninline the __inet_lookup_established function. 2008-01-28 14:59:27 -08:00
inet_sock.h [UDP]: Make use of inet_iif() when doing socket lookups. 2007-10-25 18:54:46 -07:00
inet_timewait_sock.h [INET]: Uninline the inet_twsk_put function. 2008-01-28 14:59:28 -08:00
inetpeer.h [INET]: Use list_head-s in inetpeer.c 2007-11-12 21:27:28 -08:00
ip.h [NET]: Remove unused "mibalign" argument for snmp_mib_init(). 2008-01-28 14:57:02 -08:00
ip6_checksum.h
ip6_fib.h [XFRM] IPv6: Fix dst/routing check at transformation. 2008-01-28 14:59:36 -08:00
ip6_route.h [IPV6]: Make ip6_route_init to return an error code. 2008-01-28 14:56:47 -08:00
ip6_tunnel.h [NET] include/net/: Spelling fixes 2007-12-20 13:56:32 -08:00
ip_fib.h [IPV4]: last default route is a fib table property 2008-01-28 14:57:01 -08:00
ip_vs.h [IPVS]: Move remaining sysctl handlers over to CTL_UNNUMBERED 2007-11-19 21:51:13 -08:00
ipcomp.h [IPSEC]: Get rid of ipv6_{auth,esp,comp}_hdr 2007-10-10 16:55:55 -07:00
ipconfig.h
ipip.h [IPV4]: Add ip_local_out 2008-01-28 14:53:47 -08:00
ipv6.h [IPV6]: make the protocol initialization to return an error code 2008-01-28 14:57:13 -08:00
ipx.h
iw_handler.h [NL80211]: add netlink interface to cfg80211 2007-10-10 16:52:14 -07:00
lapb.h
llc.h
llc_c_ac.h
llc_c_ev.h
llc_c_st.h
llc_conn.h [NET]: Make socket creation namespace safe. 2007-10-10 16:49:07 -07:00
llc_if.h
llc_pdu.h
llc_s_ac.h
llc_s_ev.h
llc_s_st.h
llc_sap.h
mac80211.h mac80211: support getting key sequence counters via cfg80211 2008-01-28 14:59:50 -08:00
mip6.h
ndisc.h [IPv6]: Export userland ND options through netlink (RDNSS support) 2007-10-10 21:22:05 -07:00
neighbour.h [NETNS]: Modify the neighbour table code so it handles multiple network namespaces 2008-01-28 15:00:03 -08:00
net_namespace.h [NETNS]: Add the netns_ipv4 struct 2008-01-28 14:58:08 -08:00
netdma.h
netevent.h [NET]: Remove unnecessary inclusion of dst.h 2008-01-28 14:53:38 -08:00
netlabel.h SELinux: restore proper NetLabel caching behavior 2007-08-02 11:52:21 -04:00
netlink.h [NETLINK]: Add NLA_PUT_BE16/nla_get_be16() 2008-01-28 14:58:53 -08:00
netrom.h
nexthop.h
p8022.h
pkt_cls.h [NET]: netns compilation speedup 2008-01-28 14:55:51 -08:00
pkt_sched.h [NET]: Move hardware header operations out of netdevice. 2007-10-10 16:52:52 -07:00
protocol.h [IPV6]: make inet6_register_protosw to return an error code 2008-01-28 14:57:12 -08:00
psnap.h
raw.h [RAW]: Consolidate proc interface. 2008-01-28 14:54:32 -08:00
rawv6.h [IPv6] RAW: Compact the API for the kernel 2008-01-28 14:54:29 -08:00
red.h
request_sock.h [INET]: Fix potential kfree on vmalloc-ed area of request_sock_queue 2007-11-15 02:57:06 -08:00
rose.h [ROSE]: Fix rose.ko oops on unload 2007-10-07 23:44:17 -07:00
route.h [IPV4]: Add inet_dev_addr_type() 2008-01-28 14:55:56 -08:00
rtnetlink.h [NET]: Make the device list and device lookups per namespace. 2007-10-10 16:49:10 -07:00
sch_generic.h [NET]: Move Qdisc_class_ops and Qdisc_ops in appropriate sections. 2008-01-28 14:53:58 -08:00
scm.h pid namespaces: changes to show virtual ids to user 2007-10-19 11:53:40 -07:00
slhc_vj.h
snmp.h [XFRM]: Define packet dropping statistics. 2008-01-28 14:59:38 -08:00
sock.h [SOCK] Avoid divides in sk_stream_pages() and __sk_stream_mem_reclaim() 2008-01-28 15:00:05 -08:00
syncppp.h
tcp.h [TCP]: Convert several length variable to unsigned. 2008-01-28 14:59:56 -08:00
tcp_states.h
timewait_sock.h
transp_v6.h [IPV6]: make the protocol initialization to return an error code 2008-01-28 14:57:13 -08:00
udp.h [UDP]: Restore missing inDatagrams increments 2008-01-28 14:56:33 -08:00
udplite.h [UDP]: Restore missing inDatagrams increments 2008-01-28 14:56:33 -08:00
wext.h [NET]: Make the device list and device lookups per namespace. 2007-10-10 16:49:10 -07:00
wireless.h
x25.h
x25device.h
xfrm.h [XFRM]: RFC4303 compliant auditing 2008-01-28 15:00:01 -08:00