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Andrew Morton 9970937273 net: don't use in_atomic() in gfp_any() 
The problem is that in_atomic() will return false inside spinlocks if
CONFIG_PREEMPT=n.  This will lead to deadlockable GFP_KERNEL allocations
from spinlocked regions.

Secondly, if CONFIG_PREEMPT=y, this bug solves itself because networking
will instead use GFP_ATOMIC from this callsite.  Hence we won't get the
might_sleep() debugging warnings which would have informed us of the buggy
callsites.

Solve both these problems by switching to in_interrupt().  Now, if someone
runs a gfp_any() allocation from inside spinlock we will get the warning
if CONFIG_PREEMPT=y.

I reviewed all callsites and most of them were too complex for my little
brain and none of them documented their interface requirements.  I have no
idea what this patch will do.

Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
 		2009-02-12 16:43:17 -08:00
..
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: Fix crc32c calculations on big-endian arhes. 2009-01-22 14:52:23 -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 [NET_SCHED]: act_api: use PTR_ERR in tcf_action_init/tcf_action_get 2008-01-28 15:11:17 -08:00
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
…
af_unix.h net: Fix soft lockups/OOM issues w/ unix garbage collector 2008-11-26 15:32:27 -08:00
ah.h [IPSEC]: Get rid of ipv6_{auth,esp,comp}_hdr 2007-10-10 16:55:55 -07:00
arp.h [NETFILTER]: ebtables: remove casts, use consts 2008-01-31 19:27:33 -08:00
atmclip.h
…
ax25.h [AX25] ax25_ds_timer: use mod_timer instead of add_timer 2008-02-12 17:53:34 -08:00
ax88796.h ax88796: add 93cx6 eeprom support 2007-10-10 16:53:56 -07:00
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 netlabel: Update kernel configuration API 2008-12-31 12:54:11 -05:00
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
…
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 [NET]: Wrap netdevice hardware header creation. 2007-10-10 16:52:50 -07:00
dsa.h dsa: add support for Trailer tagging format 2008-10-08 17:24:16 -07:00
dsfield.h [NET]: Constify include/net/dsfield.h 2008-01-28 14:55:58 -08:00
dst.h netns xfrm: lookup in netns 2008-11-25 17:35:18 -08:00
esp.h [IPSEC]: Use crypto_aead and authenc in ESP 2008-01-31 19:27:02 -08:00
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
…
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 [NETNS]: Inet control socket should not hold a namespace. 2008-04-03 14:28:30 -07:00
inet_connection_sock.h net: more #ifdef CONFIG_COMPAT 2008-08-28 02:53:51 -07:00
inet_ecn.h [IPV6]: Use appropriate sock tclass setting for routing lookup. 2008-04-13 23:40:51 -07:00
inet_frag.h [NET]: Rename inet_frag.h identifiers COMPLETE, FIRST_IN, LAST_IN to INET_FRAG_* 2008-03-28 16:35:27 -07:00
inet_hashtables.h net: wrong test in inet_ehash_locks_alloc() 2009-01-27 17:45:10 -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
…
ip6_fib.h [NETNS][IPV6] rt6_info - move rt6_info structure inside the namespace 2008-03-04 13:48:30 -08:00
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 [IPV4]: Fix compile error building without CONFIG_FS_PROC 2008-02-05 02:54:16 -08:00
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
…
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 [LLC]: station source mac address 2008-03-28 16:28:36 -07:00
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 [NET]: Make socket creation namespace safe. 2007-10-10 16:49:07 -07:00
llc_if.h [LLC]: Kill static inline llc_addrany 2008-02-29 11:46:17 -08:00
llc_pdu.h [LLC]: skb allocation size for responses 2008-03-31 21:02:47 -07:00
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 [LLC]: skb allocation size for responses 2008-03-31 21:02:47 -07:00
mac80211.h mac80211: more kernel-doc fixes 2009-01-16 17:08:23 -05:00
mip6.h [IPV6] MIP6: Use our standard definitions for paddings. 2008-04-12 13:43:22 +09:00
ndisc.h ipv6: Fix sporadic sendmsg -EINVAL when sending to multicast groups. 2009-01-04 16:04:39 -08:00
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 net_dma: convert to dma_find_channel 2009-01-06 11:38:15 -07:00
netevent.h [NET]: Remove unnecessary inclusion of dst.h 2008-01-28 14:53:38 -08:00
netlabel.h netlabel: Update kernel configuration API 2008-12-31 12:54:11 -05:00
netlink.h netlink: fix (theoretical) overrun in message iteration 2008-12-25 17:21:17 -08:00
netrom.h
…
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 ipv6: Add GRO support 2009-01-08 10:40:57 -08:00
psnap.h
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raw.h [RAW]: Add raw_hashinfo member on struct proto. 2008-03-22 16:56:51 -07:00
rawv6.h [IPv6] RAW: Compact the API for the kernel 2008-01-28 14:54:29 -08:00
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 [RTNL]: Introduce the rtnl_kill_links helper. 2008-04-16 00:46:52 -07:00
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: don't use in_atomic() in gfp_any() 2009-02-12 16:43:17 -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
wimax.h wimax: fix typo in kernel-doc for debugfs_dentry in struct wimax_dev 2009-01-11 00:06:32 -08:00
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