path: root/net/xfrm
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authorWANG Cong <xiyou.wangcong@gmail.com>2014-05-05 15:55:55 -0700
committerDavid S. Miller <davem@davemloft.net>2014-05-07 16:06:05 -0400
commit698365fa1874aa7635d51667a34a2842228e9837 (patch)
tree13230edeac756a36260bb2aef5d1b1da0cada7f9 /net/xfrm
parentd1f88a667c16e38d5a796b5fcdfd4ddbac1f638f (diff)
net: clean up snmp stats code
commit 8f0ea0fe3a036a47767f9c80e (snmp: reduce percpu needs by 50%) reduced snmp array size to 1, so technically it doesn't have to be an array any more. What's more, after the following commit: commit 933393f58fef9963eac61db8093689544e29a600 Date: Thu Dec 22 11:58:51 2011 -0600 percpu: Remove irqsafe_cpu_xxx variants We simply say that regular this_cpu use must be safe regardless of preemption and interrupt state. That has no material change for x86 and s390 implementations of this_cpu operations. However, arches that do not provide their own implementation for this_cpu operations will now get code generated that disables interrupts instead of preemption. probably no arch wants to have SNMP_ARRAY_SZ == 2. At least after almost 3 years, no one complains. So, just convert the array to a single pointer and remove snmp_mib_init() and snmp_mib_free() as well. Cc: Christoph Lameter <cl@linux.com> Cc: Eric Dumazet <eric.dumazet@gmail.com> Cc: David S. Miller <davem@davemloft.net> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/xfrm')
2 files changed, 5 insertions, 8 deletions
diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
index c08fbd11ceff..e63f242ae03e 100644
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -2783,21 +2783,19 @@ static struct notifier_block xfrm_dev_notifier = {
static int __net_init xfrm_statistics_init(struct net *net)
int rv;
- if (snmp_mib_init((void __percpu **)net->mib.xfrm_statistics,
- sizeof(struct linux_xfrm_mib),
- __alignof__(struct linux_xfrm_mib)) < 0)
+ net->mib.xfrm_statistics = alloc_percpu(struct linux_xfrm_mib);
+ if (!net->mib.xfrm_statistics)
return -ENOMEM;
rv = xfrm_proc_init(net);
if (rv < 0)
- snmp_mib_free((void __percpu **)net->mib.xfrm_statistics);
+ free_percpu(net->mib.xfrm_statistics);
return rv;
static void xfrm_statistics_fini(struct net *net)
- snmp_mib_free((void __percpu **)net->mib.xfrm_statistics);
+ free_percpu(net->mib.xfrm_statistics);
static int __net_init xfrm_statistics_init(struct net *net)
diff --git a/net/xfrm/xfrm_proc.c b/net/xfrm/xfrm_proc.c
index fc5abd0b456f..9c4fbd8935f4 100644
--- a/net/xfrm/xfrm_proc.c
+++ b/net/xfrm/xfrm_proc.c
@@ -54,8 +54,7 @@ static int xfrm_statistics_seq_show(struct seq_file *seq, void *v)
int i;
for (i = 0; xfrm_mib_list[i].name; i++)
seq_printf(seq, "%-24s\t%lu\n", xfrm_mib_list[i].name,
- snmp_fold_field((void __percpu **)
- net->mib.xfrm_statistics,
+ snmp_fold_field(net->mib.xfrm_statistics,
return 0;

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