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/sctp/protocol.c b/net/sctp/protocol.c
index a3c8988..9687177 100644
--- a/net/sctp/protocol.c
+++ b/net/sctp/protocol.c
@@ -996,12 +996,13 @@
static inline int init_sctp_mibs(void)
{
- return snmp_mib_init((void**)sctp_statistics, sizeof(struct sctp_mib));
+ return snmp_mib_init((void __percpu **)sctp_statistics,
+ sizeof(struct sctp_mib));
}
static inline void cleanup_sctp_mibs(void)
{
- snmp_mib_free((void**)sctp_statistics);
+ snmp_mib_free((void __percpu **)sctp_statistics);
}
static void sctp_v4_pf_init(void)
