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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
net/sctp/proc.c
+1 -1
View File
@@ -83,7 +83,7 @@ static int sctp_snmp_seq_show(struct seq_file *seq, void *v)
for (i = 0; sctp_snmp_list[i].name != NULL; i++)
seq_printf(seq, "%-32s\t%ld\n", sctp_snmp_list[i].name,
snmp_fold_field((void **)sctp_statistics,
snmp_fold_field((void __percpu **)sctp_statistics,
sctp_snmp_list[i].entry));
return 0;
net/sctp/protocol.c
+3 -2
View File
@@ -996,12 +996,13 @@ int sctp_register_pf(struct sctp_pf *pf, sa_family_t family)
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)