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Message-ID: <201508311307.3W9KBVXz%fengguang.wu@intel.com>
Date: Mon, 31 Aug 2015 13:06:10 +0800
From: kbuild test robot <fengguang.wu@...el.com>
To: Raghavendra K T <raghavendra.kt@...ux.vnet.ibm.com>
Cc: kbuild-all@...org, netdev@...r.kernel.org
Subject: [net-next:master 1512/1524] net/ipv4/af_inet.c:1486:26: error:
'offt' undeclared
tree: git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git master
head: 0ef707700f1cef2357ce655fc86a4de5e41fa4b5
commit: c4c6bc314618f60ba69b0cbf93e506e4c38a11d2 [1512/1524] net: Introduce helper functions to get the per cpu data
config: i386-randconfig-i0-201535 (attached as .config)
reproduce:
git checkout c4c6bc314618f60ba69b0cbf93e506e4c38a11d2
# save the attached .config to linux build tree
make ARCH=i386
All error/warnings (new ones prefixed by >>):
net/ipv4/af_inet.c: In function 'snmp_get_cpu_field64':
>> net/ipv4/af_inet.c:1486:26: error: 'offt' undeclared (first use in this function)
v = *(((u64 *)bhptr) + offt);
^
net/ipv4/af_inet.c:1486:26: note: each undeclared identifier is reported only once for each function it appears in
net/ipv4/af_inet.c: In function 'snmp_fold_field64':
>> net/ipv4/af_inet.c:1499:39: error: 'offct' undeclared (first use in this function)
res += snmp_get_cpu_field(mib, cpu, offct, syncp_offset);
^
>> net/ipv4/af_inet.c:1499:10: error: too many arguments to function 'snmp_get_cpu_field'
res += snmp_get_cpu_field(mib, cpu, offct, syncp_offset);
^
net/ipv4/af_inet.c:1455:5: note: declared here
u64 snmp_get_cpu_field(void __percpu *mib, int cpu, int offt)
^
net/ipv4/af_inet.c:1499: confused by earlier errors, bailing out
Preprocessed source stored into /tmp/ccqSYE62.out file, please attach this to your bugreport.
vim +/offt +1486 net/ipv4/af_inet.c
4ce3c183 Eric Dumazet 2010-06-30 1480 unsigned int start;
4ce3c183 Eric Dumazet 2010-06-30 1481
698365fa WANG Cong 2014-05-05 1482 bhptr = per_cpu_ptr(mib, cpu);
4ce3c183 Eric Dumazet 2010-06-30 1483 syncp = (struct u64_stats_sync *)(bhptr + syncp_offset);
4ce3c183 Eric Dumazet 2010-06-30 1484 do {
57a7744e Eric W. Biederman 2014-03-13 1485 start = u64_stats_fetch_begin_irq(syncp);
8f0ea0fe Eric Dumazet 2011-06-10 @1486 v = *(((u64 *)bhptr) + offt);
57a7744e Eric W. Biederman 2014-03-13 1487 } while (u64_stats_fetch_retry_irq(syncp, start));
4ce3c183 Eric Dumazet 2010-06-30 1488
c4c6bc31 Raghavendra K T 2015-08-30 1489 return v;
c4c6bc31 Raghavendra K T 2015-08-30 1490 }
c4c6bc31 Raghavendra K T 2015-08-30 1491 EXPORT_SYMBOL_GPL(snmp_get_cpu_field64);
c4c6bc31 Raghavendra K T 2015-08-30 1492
c4c6bc31 Raghavendra K T 2015-08-30 1493 u64 snmp_fold_field64(void __percpu *mib, int offt, size_t syncp_offset)
c4c6bc31 Raghavendra K T 2015-08-30 1494 {
c4c6bc31 Raghavendra K T 2015-08-30 1495 u64 res = 0;
c4c6bc31 Raghavendra K T 2015-08-30 1496 int cpu;
c4c6bc31 Raghavendra K T 2015-08-30 1497
c4c6bc31 Raghavendra K T 2015-08-30 1498 for_each_possible_cpu(cpu) {
c4c6bc31 Raghavendra K T 2015-08-30 @1499 res += snmp_get_cpu_field(mib, cpu, offct, syncp_offset);
4ce3c183 Eric Dumazet 2010-06-30 1500 }
4ce3c183 Eric Dumazet 2010-06-30 1501 return res;
4ce3c183 Eric Dumazet 2010-06-30 1502 }
:::::: The code at line 1486 was first introduced by commit
:::::: 8f0ea0fe3a036a47767f9c80e81b13e379a1f43b snmp: reduce percpu needs by 50%
:::::: TO: Eric Dumazet <eric.dumazet@...il.com>
:::::: CC: David S. Miller <davem@...emloft.net>
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