xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

net: clean up snmp stats code

Browse Source 
commit 8f0ea0fe3a (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 933393f58f
	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>
This commit is contained in:
WANG Cong
2014-05-05 15:55:55 -07:00
committed by David S. Miller
parent d1f88a667c
commit 698365fa18
12 changed files with 103 additions and 162 deletions
Download Patch File Download Diff File Expand all files Collapse all files

42
net/ipv6/af_inet6.c
View File

@@ -715,33 +715,25 @@ static int __net_init ipv6_init_mibs(struct net *net)
{
int i;
if (snmp_mib_init((void __percpu **)net->mib.udp_stats_in6,
sizeof(struct udp_mib),
__alignof__(struct udp_mib)) < 0)
net->mib.udp_stats_in6 = alloc_percpu(struct udp_mib);
if (!net->mib.udp_stats_in6)
return -ENOMEM;
if (snmp_mib_init((void __percpu **)net->mib.udplite_stats_in6,
sizeof(struct udp_mib),
__alignof__(struct udp_mib)) < 0)
net->mib.udplite_stats_in6 = alloc_percpu(struct udp_mib);
if (!net->mib.udplite_stats_in6)
goto err_udplite_mib;
if (snmp_mib_init((void __percpu **)net->mib.ipv6_statistics,
sizeof(struct ipstats_mib),
__alignof__(struct ipstats_mib)) < 0)
net->mib.ipv6_statistics = alloc_percpu(struct ipstats_mib);
if (!net->mib.ipv6_statistics)
goto err_ip_mib;
for_each_possible_cpu(i) {
struct ipstats_mib *af_inet6_stats;
af_inet6_stats = per_cpu_ptr(net->mib.ipv6_statistics[0], i);
af_inet6_stats = per_cpu_ptr(net->mib.ipv6_statistics, i);
u64_stats_init(&af_inet6_stats->syncp);
#if SNMP_ARRAY_SZ == 2
af_inet6_stats = per_cpu_ptr(net->mib.ipv6_statistics[1], i);
u64_stats_init(&af_inet6_stats->syncp);
#endif
}
if (snmp_mib_init((void __percpu **)net->mib.icmpv6_statistics,
sizeof(struct icmpv6_mib),
__alignof__(struct icmpv6_mib)) < 0)
net->mib.icmpv6_statistics = alloc_percpu(struct icmpv6_mib);
if (!net->mib.icmpv6_statistics)
goto err_icmp_mib;
net->mib.icmpv6msg_statistics = kzalloc(sizeof(struct icmpv6msg_mib),
GFP_KERNEL);
@@ -750,22 +742,22 @@ static int __net_init ipv6_init_mibs(struct net *net)
return 0;
err_icmpmsg_mib:
snmp_mib_free((void __percpu **)net->mib.icmpv6_statistics);
free_percpu(net->mib.icmpv6_statistics);
err_icmp_mib:
snmp_mib_free((void __percpu **)net->mib.ipv6_statistics);
free_percpu(net->mib.ipv6_statistics);
err_ip_mib:
snmp_mib_free((void __percpu **)net->mib.udplite_stats_in6);
free_percpu(net->mib.udplite_stats_in6);
err_udplite_mib:
snmp_mib_free((void __percpu **)net->mib.udp_stats_in6);
free_percpu(net->mib.udp_stats_in6);
return -ENOMEM;
}
static void ipv6_cleanup_mibs(struct net *net)
{
snmp_mib_free((void __percpu **)net->mib.udp_stats_in6);
snmp_mib_free((void __percpu **)net->mib.udplite_stats_in6);
snmp_mib_free((void __percpu **)net->mib.ipv6_statistics);
snmp_mib_free((void __percpu **)net->mib.icmpv6_statistics);
free_percpu(net->mib.udp_stats_in6);
free_percpu(net->mib.udplite_stats_in6);
free_percpu(net->mib.ipv6_statistics);
free_percpu(net->mib.icmpv6_statistics);
kfree(net->mib.icmpv6msg_statistics);
}