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percpu: add __percpu sparse annotations to net

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Add __percpu sparse annotations to net.

These annotations are to make sparse consider percpu variables to be
in a different address space and warn if accessed without going
through percpu accessors.  This patch doesn't affect normal builds.

The macro and type tricks around snmp stats make things a bit
interesting.  DEFINE/DECLARE_SNMP_STAT() macros mark the target field
as __percpu and SNMP_UPD_PO_STATS() macro is updated accordingly.  All
snmp_mib_*() users which used to cast the argument to (void **) are
updated to cast it to (void __percpu **).

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: David S. Miller <davem@davemloft.net>
Cc: Patrick McHardy <kaber@trash.net>
Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Cc: Vlad Yasevich <vladislav.yasevich@hp.com>
Cc: netdev@vger.kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tejun Heo
2010-02-16 15:20:26 +00:00
committed by David S. Miller
parent 2bb4646fce
commit 7d720c3e4f
22 changed files with 127 additions and 114 deletions
Download Patch File Download Diff File Expand all files Collapse all files

28
net/ipv6/af_inet6.c
View File

@ -971,41 +971,41 @@ static void ipv6_packet_cleanup(void)
static int __net_init ipv6_init_mibs(struct net *net)
{
if (snmp_mib_init((void **)net->mib.udp_stats_in6,
if (snmp_mib_init((void __percpu **)net->mib.udp_stats_in6,
sizeof (struct udp_mib)) < 0)
return -ENOMEM;
if (snmp_mib_init((void **)net->mib.udplite_stats_in6,
if (snmp_mib_init((void __percpu **)net->mib.udplite_stats_in6,
sizeof (struct udp_mib)) < 0)
goto err_udplite_mib;
if (snmp_mib_init((void **)net->mib.ipv6_statistics,
if (snmp_mib_init((void __percpu **)net->mib.ipv6_statistics,
sizeof(struct ipstats_mib)) < 0)
goto err_ip_mib;
if (snmp_mib_init((void **)net->mib.icmpv6_statistics,
if (snmp_mib_init((void __percpu **)net->mib.icmpv6_statistics,
sizeof(struct icmpv6_mib)) < 0)
goto err_icmp_mib;
if (snmp_mib_init((void **)net->mib.icmpv6msg_statistics,
if (snmp_mib_init((void __percpu **)net->mib.icmpv6msg_statistics,
sizeof(struct icmpv6msg_mib)) < 0)
goto err_icmpmsg_mib;
return 0;
err_icmpmsg_mib:
snmp_mib_free((void **)net->mib.icmpv6_statistics);
snmp_mib_free((void __percpu **)net->mib.icmpv6_statistics);
err_icmp_mib:
snmp_mib_free((void **)net->mib.ipv6_statistics);
snmp_mib_free((void __percpu **)net->mib.ipv6_statistics);
err_ip_mib:
snmp_mib_free((void **)net->mib.udplite_stats_in6);
snmp_mib_free((void __percpu **)net->mib.udplite_stats_in6);
err_udplite_mib:
snmp_mib_free((void **)net->mib.udp_stats_in6);
snmp_mib_free((void __percpu **)net->mib.udp_stats_in6);
return -ENOMEM;
}
static void ipv6_cleanup_mibs(struct net *net)
{
snmp_mib_free((void **)net->mib.udp_stats_in6);
snmp_mib_free((void **)net->mib.udplite_stats_in6);
snmp_mib_free((void **)net->mib.ipv6_statistics);
snmp_mib_free((void **)net->mib.icmpv6_statistics);
snmp_mib_free((void **)net->mib.icmpv6msg_statistics);
snmp_mib_free((void __percpu **)net->mib.udp_stats_in6);
snmp_mib_free((void __percpu **)net->mib.udplite_stats_in6);
snmp_mib_free((void __percpu **)net->mib.ipv6_statistics);
snmp_mib_free((void __percpu **)net->mib.icmpv6_statistics);
snmp_mib_free((void __percpu **)net->mib.icmpv6msg_statistics);
}
static int __net_init inet6_net_init(struct net *net)