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Date: Thu, 8 Feb 2024 21:20:34 +0800
From: kernel test robot <lkp@...el.com>
To: Eric Dumazet <edumazet@...gle.com>,
"David S . Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
netdev@...r.kernel.org, eric.dumazet@...il.com,
Eric Dumazet <edumazet@...gle.com>
Subject: Re: [PATCH net-next 10/13] net: add netdev_set_operstate() helper
Hi Eric,
kernel test robot noticed the following build errors:
[auto build test ERROR on net-next/main]
url: https://github.com/intel-lab-lkp/linux/commits/Eric-Dumazet/net-annotate-data-races-around-dev-name_assign_type/20240207-222903
base: net-next/main
patch link: https://lore.kernel.org/r/20240207142629.3456570-11-edumazet%40google.com
patch subject: [PATCH net-next 10/13] net: add netdev_set_operstate() helper
config: riscv-defconfig (https://download.01.org/0day-ci/archive/20240208/202402082151.O18ZoLSK-lkp@intel.com/config)
compiler: clang version 19.0.0git (https://github.com/llvm/llvm-project 7dd790db8b77c4a833c06632e903dc4f13877a64)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240208/202402082151.O18ZoLSK-lkp@intel.com/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202402082151.O18ZoLSK-lkp@intel.com/
All errors (new ones prefixed by >>):
>> net/core/rtnetlink.c:852:12: error: call to '__compiletime_assert_784' declared with 'error' attribute: BUILD_BUG failed
852 | } while (!try_cmpxchg(&dev->operstate, &old, newstate));
| ^
include/linux/atomic/atomic-instrumented.h:4838:2: note: expanded from macro 'try_cmpxchg'
4838 | raw_try_cmpxchg(__ai_ptr, __ai_oldp, __VA_ARGS__); \
| ^
include/linux/atomic/atomic-arch-fallback.h:192:9: note: expanded from macro 'raw_try_cmpxchg'
192 | ___r = raw_cmpxchg((_ptr), ___o, (_new)); \
| ^
include/linux/atomic/atomic-arch-fallback.h:55:21: note: expanded from macro 'raw_cmpxchg'
55 | #define raw_cmpxchg arch_cmpxchg
| ^
note: (skipping 5 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
include/linux/compiler_types.h:423:2: note: expanded from macro '_compiletime_assert'
423 | __compiletime_assert(condition, msg, prefix, suffix)
| ^
include/linux/compiler_types.h:416:4: note: expanded from macro '__compiletime_assert'
416 | prefix ## suffix(); \
| ^
<scratch space>:50:1: note: expanded from here
50 | __compiletime_assert_784
| ^
>> net/core/rtnetlink.c:852:12: error: call to '__compiletime_assert_784' declared with 'error' attribute: BUILD_BUG failed
include/linux/atomic/atomic-instrumented.h:4838:2: note: expanded from macro 'try_cmpxchg'
4838 | raw_try_cmpxchg(__ai_ptr, __ai_oldp, __VA_ARGS__); \
| ^
include/linux/atomic/atomic-arch-fallback.h:192:9: note: expanded from macro 'raw_try_cmpxchg'
192 | ___r = raw_cmpxchg((_ptr), ___o, (_new)); \
| ^
include/linux/atomic/atomic-arch-fallback.h:55:21: note: expanded from macro 'raw_cmpxchg'
55 | #define raw_cmpxchg arch_cmpxchg
| ^
note: (skipping 5 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
include/linux/compiler_types.h:423:2: note: expanded from macro '_compiletime_assert'
423 | __compiletime_assert(condition, msg, prefix, suffix)
| ^
include/linux/compiler_types.h:416:4: note: expanded from macro '__compiletime_assert'
416 | prefix ## suffix(); \
| ^
<scratch space>:50:1: note: expanded from here
50 | __compiletime_assert_784
| ^
>> net/core/rtnetlink.c:852:12: error: call to '__compiletime_assert_784' declared with 'error' attribute: BUILD_BUG failed
include/linux/atomic/atomic-instrumented.h:4838:2: note: expanded from macro 'try_cmpxchg'
4838 | raw_try_cmpxchg(__ai_ptr, __ai_oldp, __VA_ARGS__); \
| ^
include/linux/atomic/atomic-arch-fallback.h:192:9: note: expanded from macro 'raw_try_cmpxchg'
192 | ___r = raw_cmpxchg((_ptr), ___o, (_new)); \
| ^
include/linux/atomic/atomic-arch-fallback.h:55:21: note: expanded from macro 'raw_cmpxchg'
55 | #define raw_cmpxchg arch_cmpxchg
| ^
note: (skipping 5 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
include/linux/compiler_types.h:423:2: note: expanded from macro '_compiletime_assert'
423 | __compiletime_assert(condition, msg, prefix, suffix)
| ^
include/linux/compiler_types.h:416:4: note: expanded from macro '__compiletime_assert'
416 | prefix ## suffix(); \
| ^
<scratch space>:50:1: note: expanded from here
50 | __compiletime_assert_784
| ^
3 errors generated.
vim +852 net/core/rtnetlink.c
844
845 void netdev_set_operstate(struct net_device *dev, int newstate)
846 {
847 unsigned char old = READ_ONCE(dev->operstate);
848
849 do {
850 if (old == newstate)
851 return;
> 852 } while (!try_cmpxchg(&dev->operstate, &old, newstate));
853
854 netdev_state_change(dev);
855 }
856 EXPORT_SYMBOL(netdev_set_operstate);
857
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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