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| author |   Eric Dumazet <edumazet@google.com> | 2016-04-28 06:33:24 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2016-04-28 11:49:45 -0400 |
| commit | ba7863f4d3bfe1698e0a92934cbc9c3021f4448d (patch) | |
| tree | 1c16be7df70cdc963ef59fd3e9c5ecfb553fda00 /include/net/snmp.h | |
| parent | Merge branch 'socket-space-optimizations' (diff) | |
| download | linux-dev-ba7863f4d3bfe1698e0a92934cbc9c3021f4448d.tar.xz linux-dev-ba7863f4d3bfe1698e0a92934cbc9c3021f4448d.zip | |
net: snmp: fix 64bit stats on 32bit arches
I accidentally replaced BH disabling by preemption disabling
in SNMP_ADD_STATS64() and SNMP_UPD_PO_STATS64() on 32bit builds.
For 64bit stats on 32bit arch, we really need to disable BH,
since the "struct u64_stats_sync syncp" might be manipulated
both from process and BH contexts.
Fixes: 6aef70a851ac ("net: snmp: kill various STATS_USER() helpers")
Reported-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Tested-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/snmp.h')
| -rw-r--r-- | include/net/snmp.h | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/include/net/snmp.h b/include/net/snmp.h index 6bdd255b2250..c9228ad7ee91 100644 --- a/include/net/snmp.h +++ b/include/net/snmp.h @@ -166,9 +166,9 @@ struct linux_xfrm_mib { #define SNMP_ADD_STATS64(mib, field, addend) \ do { \ - preempt_disable(); \ + local_bh_disable(); \ __SNMP_ADD_STATS64(mib, field, addend); \ - preempt_enable(); \ + local_bh_enable(); \ } while (0) #define __SNMP_INC_STATS64(mib, field) SNMP_ADD_STATS64(mib, field, 1) @@ -184,9 +184,9 @@ struct linux_xfrm_mib { } while (0) #define SNMP_UPD_PO_STATS64(mib, basefield, addend) \ do { \ - preempt_disable(); \ + local_bh_disable(); \ __SNMP_UPD_PO_STATS64(mib, basefield, addend); \ - preempt_enable(); \ + local_bh_enable(); \ } while (0) #else #define __SNMP_INC_STATS64(mib, field) __SNMP_INC_STATS(mib, field) |