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authorTejun Heo <tj@kernel.org>2010-02-16 15:20:26 (GMT)
committerDavid S. Miller <davem@davemloft.net>2010-02-17 07:05:38 (GMT)
commit7d720c3e4f0c4fc152a6bf17e24244a3c85412d2 (patch)
tree36e037187ce79acb211702bea22e99c625787757 /net/ipv4/af_inet.c
parent2bb4646fce8d09916b351d1a62f98db7cec6fc41 (diff)
downloadlinux-7d720c3e4f0c4fc152a6bf17e24244a3c85412d2.tar.xz
percpu: add __percpu sparse annotations to net
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>
Diffstat (limited to 'net/ipv4/af_inet.c')
-rw-r--r--net/ipv4/af_inet.c46
1 files changed, 23 insertions, 23 deletions
diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index 7d12c6a..33b7dff 100644
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -1385,7 +1385,7 @@ int inet_ctl_sock_create(struct sock **sk, unsigned short family,
}
EXPORT_SYMBOL_GPL(inet_ctl_sock_create);
-unsigned long snmp_fold_field(void *mib[], int offt)
+unsigned long snmp_fold_field(void __percpu *mib[], int offt)
{
unsigned long res = 0;
int i;
@@ -1398,7 +1398,7 @@ unsigned long snmp_fold_field(void *mib[], int offt)
}
EXPORT_SYMBOL_GPL(snmp_fold_field);
-int snmp_mib_init(void *ptr[2], size_t mibsize)
+int snmp_mib_init(void __percpu *ptr[2], size_t mibsize)
{
BUG_ON(ptr == NULL);
ptr[0] = __alloc_percpu(mibsize, __alignof__(unsigned long long));
@@ -1416,7 +1416,7 @@ err0:
}
EXPORT_SYMBOL_GPL(snmp_mib_init);
-void snmp_mib_free(void *ptr[2])
+void snmp_mib_free(void __percpu *ptr[2])
{
BUG_ON(ptr == NULL);
free_percpu(ptr[0]);
@@ -1460,25 +1460,25 @@ static const struct net_protocol icmp_protocol = {
static __net_init int ipv4_mib_init_net(struct net *net)
{
- if (snmp_mib_init((void **)net->mib.tcp_statistics,
+ if (snmp_mib_init((void __percpu **)net->mib.tcp_statistics,
sizeof(struct tcp_mib)) < 0)
goto err_tcp_mib;
- if (snmp_mib_init((void **)net->mib.ip_statistics,
+ if (snmp_mib_init((void __percpu **)net->mib.ip_statistics,
sizeof(struct ipstats_mib)) < 0)
goto err_ip_mib;
- if (snmp_mib_init((void **)net->mib.net_statistics,
+ if (snmp_mib_init((void __percpu **)net->mib.net_statistics,
sizeof(struct linux_mib)) < 0)
goto err_net_mib;
- if (snmp_mib_init((void **)net->mib.udp_statistics,
+ if (snmp_mib_init((void __percpu **)net->mib.udp_statistics,
sizeof(struct udp_mib)) < 0)
goto err_udp_mib;
- if (snmp_mib_init((void **)net->mib.udplite_statistics,
+ if (snmp_mib_init((void __percpu **)net->mib.udplite_statistics,
sizeof(struct udp_mib)) < 0)
goto err_udplite_mib;
- if (snmp_mib_init((void **)net->mib.icmp_statistics,
+ if (snmp_mib_init((void __percpu **)net->mib.icmp_statistics,
sizeof(struct icmp_mib)) < 0)
goto err_icmp_mib;
- if (snmp_mib_init((void **)net->mib.icmpmsg_statistics,
+ if (snmp_mib_init((void __percpu **)net->mib.icmpmsg_statistics,
sizeof(struct icmpmsg_mib)) < 0)
goto err_icmpmsg_mib;
@@ -1486,30 +1486,30 @@ static __net_init int ipv4_mib_init_net(struct net *net)
return 0;
err_icmpmsg_mib:
- snmp_mib_free((void **)net->mib.icmp_statistics);
+ snmp_mib_free((void __percpu **)net->mib.icmp_statistics);
err_icmp_mib:
- snmp_mib_free((void **)net->mib.udplite_statistics);
+ snmp_mib_free((void __percpu **)net->mib.udplite_statistics);
err_udplite_mib:
- snmp_mib_free((void **)net->mib.udp_statistics);
+ snmp_mib_free((void __percpu **)net->mib.udp_statistics);
err_udp_mib:
- snmp_mib_free((void **)net->mib.net_statistics);
+ snmp_mib_free((void __percpu **)net->mib.net_statistics);
err_net_mib:
- snmp_mib_free((void **)net->mib.ip_statistics);
+ snmp_mib_free((void __percpu **)net->mib.ip_statistics);
err_ip_mib:
- snmp_mib_free((void **)net->mib.tcp_statistics);
+ snmp_mib_free((void __percpu **)net->mib.tcp_statistics);
err_tcp_mib:
return -ENOMEM;
}
static __net_exit void ipv4_mib_exit_net(struct net *net)
{
- snmp_mib_free((void **)net->mib.icmpmsg_statistics);
- snmp_mib_free((void **)net->mib.icmp_statistics);
- snmp_mib_free((void **)net->mib.udplite_statistics);
- snmp_mib_free((void **)net->mib.udp_statistics);
- snmp_mib_free((void **)net->mib.net_statistics);
- snmp_mib_free((void **)net->mib.ip_statistics);
- snmp_mib_free((void **)net->mib.tcp_statistics);
+ snmp_mib_free((void __percpu **)net->mib.icmpmsg_statistics);
+ snmp_mib_free((void __percpu **)net->mib.icmp_statistics);
+ snmp_mib_free((void __percpu **)net->mib.udplite_statistics);
+ snmp_mib_free((void __percpu **)net->mib.udp_statistics);
+ snmp_mib_free((void __percpu **)net->mib.net_statistics);
+ snmp_mib_free((void __percpu **)net->mib.ip_statistics);
+ snmp_mib_free((void __percpu **)net->mib.tcp_statistics);
}
static __net_initdata struct pernet_operations ipv4_mib_ops = {