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Date: Wed, 16 Nov 2016 18:23:06 +0800
From: kbuild test robot <lkp@...el.com>
To: Nicolas Dichtel <nicolas.dichtel@...nd.com>
Cc: kbuild-all@...org, avagin@...il.com, davem@...emloft.net,
netdev@...r.kernel.org, xiyou.wangcong@...il.com,
Nicolas Dichtel <nicolas.dichtel@...nd.com>
Subject: Re: [PATCH net] net: nsid cannot be allocated for a dead netns
Hi Nicolas,
[auto build test ERROR on net/master]
url: https://github.com/0day-ci/linux/commits/Nicolas-Dichtel/net-nsid-cannot-be-allocated-for-a-dead-netns/20161116-164739
config: sparc-defconfig (attached as .config)
compiler: sparc-linux-gcc (GCC) 6.2.0
reproduce:
wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# save the attached .config to linux build tree
make.cross ARCH=sparc
All error/warnings (new ones prefixed by >>):
In file included from include/uapi/linux/stddef.h:1:0,
from include/linux/stddef.h:4,
from include/uapi/linux/posix_types.h:4,
from include/uapi/linux/types.h:13,
from include/linux/types.h:5,
from include/linux/list.h:4,
from include/linux/timer.h:4,
from include/linux/workqueue.h:8,
from net/core/net_namespace.c:3:
net/core/net_namespace.c: In function 'alloc_netid':
>> arch/sparc/include/asm/atomic_32.h:32:48: error: invalid type argument of '->' (have 'atomic_t {aka struct <anonymous>}')
#define atomic_read(v) ACCESS_ONCE((v)->counter)
^
include/linux/compiler.h:545:25: note: in definition of macro '__ACCESS_ONCE'
__maybe_unused typeof(x) __var = (__force typeof(x)) 0; \
^
>> arch/sparc/include/asm/atomic_32.h:32:33: note: in expansion of macro 'ACCESS_ONCE'
#define atomic_read(v) ACCESS_ONCE((v)->counter)
^~~~~~~~~~~
net/core/net_namespace.c:162:37: note: in expansion of macro 'atomic_read'
if (!atomic_read(&net->count) || !&atomic_read(peer->count))
^~~~~~~~~~~
>> arch/sparc/include/asm/atomic_32.h:32:48: error: invalid type argument of '->' (have 'atomic_t {aka struct <anonymous>}')
#define atomic_read(v) ACCESS_ONCE((v)->counter)
^
include/linux/compiler.h:545:52: note: in definition of macro '__ACCESS_ONCE'
__maybe_unused typeof(x) __var = (__force typeof(x)) 0; \
^
>> arch/sparc/include/asm/atomic_32.h:32:33: note: in expansion of macro 'ACCESS_ONCE'
#define atomic_read(v) ACCESS_ONCE((v)->counter)
^~~~~~~~~~~
net/core/net_namespace.c:162:37: note: in expansion of macro 'atomic_read'
if (!atomic_read(&net->count) || !&atomic_read(peer->count))
^~~~~~~~~~~
>> arch/sparc/include/asm/atomic_32.h:32:48: error: invalid type argument of '->' (have 'atomic_t {aka struct <anonymous>}')
#define atomic_read(v) ACCESS_ONCE((v)->counter)
^
include/linux/compiler.h:546:19: note: in definition of macro '__ACCESS_ONCE'
(volatile typeof(x) *)&(x); })
^
>> arch/sparc/include/asm/atomic_32.h:32:33: note: in expansion of macro 'ACCESS_ONCE'
#define atomic_read(v) ACCESS_ONCE((v)->counter)
^~~~~~~~~~~
net/core/net_namespace.c:162:37: note: in expansion of macro 'atomic_read'
if (!atomic_read(&net->count) || !&atomic_read(peer->count))
^~~~~~~~~~~
>> arch/sparc/include/asm/atomic_32.h:32:48: error: invalid type argument of '->' (have 'atomic_t {aka struct <anonymous>}')
#define atomic_read(v) ACCESS_ONCE((v)->counter)
^
include/linux/compiler.h:546:26: note: in definition of macro '__ACCESS_ONCE'
(volatile typeof(x) *)&(x); })
^
>> arch/sparc/include/asm/atomic_32.h:32:33: note: in expansion of macro 'ACCESS_ONCE'
#define atomic_read(v) ACCESS_ONCE((v)->counter)
^~~~~~~~~~~
net/core/net_namespace.c:162:37: note: in expansion of macro 'atomic_read'
if (!atomic_read(&net->count) || !&atomic_read(peer->count))
^~~~~~~~~~~
vim +32 arch/sparc/include/asm/atomic_32.h
d550bbd4 arch/sparc/include/asm/atomic_32.h David Howells 2012-03-28 16 #include <asm/cmpxchg.h>
56d36489 arch/sparc/include/asm/atomic_32.h Peter Zijlstra 2014-03-13 17 #include <asm/barrier.h>
aea1181b arch/sparc/include/asm/atomic_32.h Sam Ravnborg 2011-12-27 18 #include <asm-generic/atomic64.h>
aea1181b arch/sparc/include/asm/atomic_32.h Sam Ravnborg 2011-12-27 19
f5e706ad include/asm-sparc/atomic_32.h Sam Ravnborg 2008-07-17 20 #define ATOMIC_INIT(i) { (i) }
f5e706ad include/asm-sparc/atomic_32.h Sam Ravnborg 2008-07-17 21
4f3316c2 arch/sparc/include/asm/atomic_32.h Peter Zijlstra 2014-03-26 22 int atomic_add_return(int, atomic_t *);
3a1adb23 arch/sparc/include/asm/atomic_32.h Peter Zijlstra 2016-04-18 23 int atomic_fetch_add(int, atomic_t *);
3a1adb23 arch/sparc/include/asm/atomic_32.h Peter Zijlstra 2016-04-18 24 int atomic_fetch_and(int, atomic_t *);
3a1adb23 arch/sparc/include/asm/atomic_32.h Peter Zijlstra 2016-04-18 25 int atomic_fetch_or(int, atomic_t *);
3a1adb23 arch/sparc/include/asm/atomic_32.h Peter Zijlstra 2016-04-18 26 int atomic_fetch_xor(int, atomic_t *);
f05a6865 arch/sparc/include/asm/atomic_32.h Sam Ravnborg 2014-05-16 27 int atomic_cmpxchg(atomic_t *, int, int);
1a17fdc4 arch/sparc/include/asm/atomic_32.h Andreas Larsson 2014-11-05 28 int atomic_xchg(atomic_t *, int);
f05a6865 arch/sparc/include/asm/atomic_32.h Sam Ravnborg 2014-05-16 29 int __atomic_add_unless(atomic_t *, int, int);
f05a6865 arch/sparc/include/asm/atomic_32.h Sam Ravnborg 2014-05-16 30 void atomic_set(atomic_t *, int);
f5e706ad include/asm-sparc/atomic_32.h Sam Ravnborg 2008-07-17 31
2291059c arch/sparc/include/asm/atomic_32.h Pranith Kumar 2014-09-23 @32 #define atomic_read(v) ACCESS_ONCE((v)->counter)
f5e706ad include/asm-sparc/atomic_32.h Sam Ravnborg 2008-07-17 33
4f3316c2 arch/sparc/include/asm/atomic_32.h Peter Zijlstra 2014-03-26 34 #define atomic_add(i, v) ((void)atomic_add_return( (int)(i), (v)))
4f3316c2 arch/sparc/include/asm/atomic_32.h Peter Zijlstra 2014-03-26 35 #define atomic_sub(i, v) ((void)atomic_add_return(-(int)(i), (v)))
4f3316c2 arch/sparc/include/asm/atomic_32.h Peter Zijlstra 2014-03-26 36 #define atomic_inc(v) ((void)atomic_add_return( 1, (v)))
4f3316c2 arch/sparc/include/asm/atomic_32.h Peter Zijlstra 2014-03-26 37 #define atomic_dec(v) ((void)atomic_add_return( -1, (v)))
f5e706ad include/asm-sparc/atomic_32.h Sam Ravnborg 2008-07-17 38
3a1adb23 arch/sparc/include/asm/atomic_32.h Peter Zijlstra 2016-04-18 39 #define atomic_and(i, v) ((void)atomic_fetch_and((i), (v)))
3a1adb23 arch/sparc/include/asm/atomic_32.h Peter Zijlstra 2016-04-18 40 #define atomic_or(i, v) ((void)atomic_fetch_or((i), (v)))
:::::: The code at line 32 was first introduced by commit
:::::: 2291059c852706c6f5ffb400366042b7625066cd locking,arch: Use ACCESS_ONCE() instead of cast to volatile in atomic_read()
:::::: TO: Pranith Kumar <bobby.prani@...il.com>
:::::: CC: Ingo Molnar <mingo@...nel.org>
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
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