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>
diff --git a/net/ipv4/proc.c b/net/ipv4/proc.c
index 1b09a6d..242ed23 100644
--- a/net/ipv4/proc.c
+++ b/net/ipv4/proc.c
@@ -280,7 +280,7 @@
count = 0;
for (i = 0; i < ICMPMSG_MIB_MAX; i++) {
- val = snmp_fold_field((void **) net->mib.icmpmsg_statistics, i);
+ val = snmp_fold_field((void __percpu **) net->mib.icmpmsg_statistics, i);
if (val) {
type[count] = i;
vals[count++] = val;
@@ -307,18 +307,18 @@
for (i=0; icmpmibmap[i].name != NULL; i++)
seq_printf(seq, " Out%s", icmpmibmap[i].name);
seq_printf(seq, "\nIcmp: %lu %lu",
- snmp_fold_field((void **) net->mib.icmp_statistics, ICMP_MIB_INMSGS),
- snmp_fold_field((void **) net->mib.icmp_statistics, ICMP_MIB_INERRORS));
+ snmp_fold_field((void __percpu **) net->mib.icmp_statistics, ICMP_MIB_INMSGS),
+ snmp_fold_field((void __percpu **) net->mib.icmp_statistics, ICMP_MIB_INERRORS));
for (i=0; icmpmibmap[i].name != NULL; i++)
seq_printf(seq, " %lu",
- snmp_fold_field((void **) net->mib.icmpmsg_statistics,
+ snmp_fold_field((void __percpu **) net->mib.icmpmsg_statistics,
icmpmibmap[i].index));
seq_printf(seq, " %lu %lu",
- snmp_fold_field((void **) net->mib.icmp_statistics, ICMP_MIB_OUTMSGS),
- snmp_fold_field((void **) net->mib.icmp_statistics, ICMP_MIB_OUTERRORS));
+ snmp_fold_field((void __percpu **) net->mib.icmp_statistics, ICMP_MIB_OUTMSGS),
+ snmp_fold_field((void __percpu **) net->mib.icmp_statistics, ICMP_MIB_OUTERRORS));
for (i=0; icmpmibmap[i].name != NULL; i++)
seq_printf(seq, " %lu",
- snmp_fold_field((void **) net->mib.icmpmsg_statistics,
+ snmp_fold_field((void __percpu **) net->mib.icmpmsg_statistics,
icmpmibmap[i].index | 0x100));
}
@@ -341,7 +341,7 @@
for (i = 0; snmp4_ipstats_list[i].name != NULL; i++)
seq_printf(seq, " %lu",
- snmp_fold_field((void **)net->mib.ip_statistics,
+ snmp_fold_field((void __percpu **)net->mib.ip_statistics,
snmp4_ipstats_list[i].entry));
icmp_put(seq); /* RFC 2011 compatibility */
@@ -356,11 +356,11 @@
/* MaxConn field is signed, RFC 2012 */
if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN)
seq_printf(seq, " %ld",
- snmp_fold_field((void **)net->mib.tcp_statistics,
+ snmp_fold_field((void __percpu **)net->mib.tcp_statistics,
snmp4_tcp_list[i].entry));
else
seq_printf(seq, " %lu",
- snmp_fold_field((void **)net->mib.tcp_statistics,
+ snmp_fold_field((void __percpu **)net->mib.tcp_statistics,
snmp4_tcp_list[i].entry));
}
@@ -371,7 +371,7 @@
seq_puts(seq, "\nUdp:");
for (i = 0; snmp4_udp_list[i].name != NULL; i++)
seq_printf(seq, " %lu",
- snmp_fold_field((void **)net->mib.udp_statistics,
+ snmp_fold_field((void __percpu **)net->mib.udp_statistics,
snmp4_udp_list[i].entry));
/* the UDP and UDP-Lite MIBs are the same */
@@ -382,7 +382,7 @@
seq_puts(seq, "\nUdpLite:");
for (i = 0; snmp4_udp_list[i].name != NULL; i++)
seq_printf(seq, " %lu",
- snmp_fold_field((void **)net->mib.udplite_statistics,
+ snmp_fold_field((void __percpu **)net->mib.udplite_statistics,
snmp4_udp_list[i].entry));
seq_putc(seq, '\n');
@@ -419,7 +419,7 @@
seq_puts(seq, "\nTcpExt:");
for (i = 0; snmp4_net_list[i].name != NULL; i++)
seq_printf(seq, " %lu",
- snmp_fold_field((void **)net->mib.net_statistics,
+ snmp_fold_field((void __percpu **)net->mib.net_statistics,
snmp4_net_list[i].entry));
seq_puts(seq, "\nIpExt:");
@@ -429,7 +429,7 @@
seq_puts(seq, "\nIpExt:");
for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++)
seq_printf(seq, " %lu",
- snmp_fold_field((void **)net->mib.ip_statistics,
+ snmp_fold_field((void __percpu **)net->mib.ip_statistics,
snmp4_ipextstats_list[i].entry));
seq_putc(seq, '\n');
