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Dan Williams 6f49a57aa5 dmaengine: up-level reference counting to the module level 
Simply, if a client wants any dmaengine channel then prevent all dmaengine
modules from being removed.  Once the clients are done re-enable module
removal.

Why?, beyond reducing complication:
1/ Tracking reference counts per-transaction in an efficient manner, as
   is currently done, requires a complicated scheme to avoid cache-line
   bouncing effects.
2/ Per-transaction ref-counting gives the false impression that a
   dma-driver can be gracefully removed ahead of its user (net, md, or
   dma-slave)
3/ None of the in-tree dma-drivers talk to hot pluggable hardware, but
   if such an engine were built one day we still would not need to notify
   clients of remove events.  The driver can simply return NULL to a
   ->prep() request, something that is much easier for a client to handle.

Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
 		2009-01-06 11:38:14 -07:00
..
9p 9p: fix sparse warnings 2008-10-22 18:54:47 -05:00
bluetooth Bluetooth: Enable per-module dynamic debug messages 2008-11-30 12:17:28 +01:00
irda irda: Add irda_skb_cb qdisc related padding 2008-12-17 15:44:58 -08:00
iucv [S390] iucv: Locking free version of iucv_message_(receive|send) 2008-12-25 13:39:04 +01:00
netfilter netfilter: fix warning in net/netfilter/nf_conntrack_proto_tcp.c 2008-11-25 18:20:13 +01:00
netns netns: ip6mr: declare reg_vif_num per-namespace 2008-12-10 16:29:24 -08:00
phonet Phonet: use atomic for packet TX window 2008-12-17 15:48:31 -08:00
sctp sctp: Implement socket option SCTP_GET_ASSOC_NUMBER 2008-12-25 16:57:24 -08:00
tc_act pkt_action: add new action skbedit 2008-09-12 16:30:20 -07:00
tipc tipc: Remove unneeded parameter to tipc_createport_raw() 2008-07-14 22:42:19 -07:00
act_api.h
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addrconf.h netns: Add network namespace argument to rt6_fill_node() and ipv6_dev_get_saddr() 2008-08-14 15:33:21 -07:00
af_rxrpc.h
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af_unix.h net: Fix soft lockups/OOM issues w/ unix garbage collector 2008-11-26 15:32:27 -08:00
ah.h
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arp.h
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atmclip.h
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ax25.h
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ax88796.h
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cfg80211.h mac80211: Fix HT channel selection 2008-12-19 15:22:54 -05:00
checksum.h include/net net/ - csum_partial - remove unnecessary casts 2008-11-19 15:44:53 -08:00
cipso_ipv4.h cipso: Add support for native local labeling and fixup mapping names 2008-10-10 10:16:34 -04:00
compat.h net: Use standard structures for generic socket address structures. 2008-07-19 22:35:47 -07:00
datalink.h
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dcbnl.h net: fix DCB setstate to return success/failure 2008-12-21 20:09:50 -08:00
dn.h decnet: compile fix for removal of byteorder wrapper 2008-11-27 23:04:13 -08:00
dn_dev.h
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dn_fib.h decnet: remove private wrappers of endian helpers 2008-11-27 00:12:47 -08:00
dn_neigh.h
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dn_nsp.h
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dn_route.h
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dsa.h dsa: add support for Trailer tagging format 2008-10-08 17:24:16 -07:00
dsfield.h
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dst.h netns xfrm: lookup in netns 2008-11-25 17:35:18 -08:00
esp.h
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fib_rules.h net: add fib_rules_ops to flush_cache method 2008-07-05 19:01:28 -07:00
flow.h netns xfrm: lookup in netns 2008-11-25 17:35:18 -08:00
garp.h vlan: Add GVRP support 2008-07-05 21:26:57 -07:00
gen_stats.h pkt_sched: gen_estimator: Optimize gen_estimator_active() 2008-11-26 15:24:32 -08:00
genetlink.h netlink: Improve returned error codes 2008-06-03 16:36:54 -07:00
icmp.h mib: put icmpmsg statistics on struct net 2008-07-18 04:04:22 -07:00
ieee80211.h ieee80211_security: correct warning about width of auth_mode 2008-12-12 13:48:30 -05:00
ieee80211_radiotap.h wireless: clean up radiotap a bit 2008-12-05 09:32:59 -05:00
if_inet6.h ipv6: make struct ipv6_devconf static 2008-07-22 14:21:58 -07:00
inet6_connection_sock.h
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inet6_hashtables.h inet: Don't lookup the socket if there's a socket attached to the skb 2008-10-07 12:41:01 -07:00
inet_common.h
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inet_connection_sock.h net: more #ifdef CONFIG_COMPAT 2008-08-28 02:53:51 -07:00
inet_ecn.h
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inet_frag.h
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inet_hashtables.h net: Convert TCP/DCCP listening hash tables to use RCU 2008-11-23 17:22:55 -08:00
inet_sock.h tcp: Port redirection support for TCP 2008-10-01 07:46:49 -07:00
inet_timewait_sock.h net: Convert TCP & DCCP hash tables to use RCU / hlist_nulls 2008-11-16 19:40:17 -08:00
inetpeer.h net: remove CVS keywords 2008-06-11 21:00:38 -07:00
ip.h netns xfrm: per-netns sysctls 2008-11-25 18:00:48 -08:00
ip6_checksum.h
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ip6_fib.h
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ip6_route.h netns: Add network namespace argument to rt6_fill_node() and ipv6_dev_get_saddr() 2008-08-14 15:33:21 -07:00
ip6_tunnel.h net: remove CVS keywords 2008-06-11 21:00:38 -07:00
ip_fib.h
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ip_vs.h include/net net/ - csum_partial - remove unnecessary casts 2008-11-19 15:44:53 -08:00
ipcomp.h ipsec: ipcomp - Merge IPComp implementations 2008-07-25 02:54:40 -07:00
ipconfig.h net: remove CVS keywords 2008-06-11 21:00:38 -07:00
ipip.h inet: Make tunnel RX/TX byte counters more consistent 2008-10-09 12:03:17 -07:00
ipv6.h ipv6: making ip and icmp statistics per/namespace 2008-10-08 11:16:45 -07:00
ipx.h
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iw_handler.h wext: Emit event stream entries correctly when compat. 2008-06-16 18:50:49 -07:00
lapb.h
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lib80211.h wireless: missing include in lib80211.h 2008-11-21 11:42:55 -05:00
llc.h
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llc_c_ac.h
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llc_c_ev.h
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llc_c_st.h
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llc_conn.h
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llc_if.h
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llc_pdu.h
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llc_s_ac.h
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llc_s_ev.h
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llc_s_st.h
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llc_sap.h
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mac80211.h mac80211: implement dynamic power save 2008-12-19 15:24:00 -05:00
mip6.h
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ndisc.h bonding: send IPv6 neighbor advertisement on failover 2008-11-06 00:49:37 -05:00
neighbour.h net: Cleanup of neighbour code 2008-11-12 00:54:54 -08:00
net_namespace.h netns xfrm: add netns boilerplate 2008-11-25 17:14:31 -08:00
netdma.h dmaengine: up-level reference counting to the module level 2009-01-06 11:38:14 -07:00
netevent.h
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netlabel.h netlabel: Add configuration support for local labeling 2008-10-10 10:16:34 -04:00
netlink.h netlink: fix (theoretical) overrun in message iteration 2008-12-25 17:21:17 -08:00
netrom.h
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nexthop.h
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p8022.h
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pkt_cls.h ematch: simpler tcf_em_unregister() 2008-11-16 23:01:49 -08:00
pkt_sched.h pkt_sched: Remove the tx queue state check in qdisc_run() 2008-09-23 01:05:56 -07:00
protocol.h ipv4: Add GRO infrastructure 2008-12-15 23:41:09 -08:00
psnap.h
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raw.h
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rawv6.h
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red.h
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request_sock.h net: Fix memory leak in the proto_register function 2008-11-21 16:45:22 -08:00
rose.h rose: improving AX25 routing frames via ROSE network 2008-06-17 17:08:32 -07:00
route.h ipv4: Conditionally enable transparent flow flag when connecting 2008-10-01 07:35:39 -07:00
rtnetlink.h
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sch_generic.h pkt_sched: Remove qdisc->ops->requeue() etc. 2008-11-13 22:56:30 -08:00
scm.h Merge branch 'master' into next 2008-11-14 11:29:12 +11:00
slhc_vj.h
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snmp.h net: remove CVS keywords 2008-06-11 21:00:38 -07:00
sock.h net: Use a percpu_counter for orphan_count 2008-11-25 21:17:14 -08:00
stp.h net: Add STP demux layer 2008-07-05 21:25:39 -07:00
tcp.h tcp: Add GRO support 2008-12-15 23:43:36 -08:00
tcp_states.h
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timewait_sock.h net: Fix memory leak in the proto_register function 2008-11-21 16:45:22 -08:00
transp_v6.h net: change proto destroy method to return void 2008-06-14 17:04:49 -07:00
udp.h udp: Use hlist_nulls in UDP RCU code 2008-11-16 19:39:21 -08:00
udplite.h udp: introduce struct udp_table and multiple spinlocks 2008-10-29 01:41:45 -07:00
wext.h wext: Dispatch and handle compat ioctls entirely in net/wireless/wext.c 2008-06-16 18:32:46 -07:00
wireless.h cfg80211: add support for custom firmware regulatory solutions 2008-11-25 16:41:27 -05:00
x25.h
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x25device.h
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xfrm.h netns xfrm: per-netns sysctls 2008-11-25 18:00:48 -08:00