From: kernel test robot <lkp@intel.com>
To: Dave Marchevsky <davemarchevsky@fb.com>
Cc: oe-kbuild-all@lists.linux.dev
Subject: Re: [PATCH v2 bpf-next 3/6] bpf: Add 'owner' field to bpf_{list,rb}_node
Date: Wed, 19 Jul 2023 20:28:01 +0800 [thread overview]
Message-ID: <202307192025.5vigLEcy-lkp@intel.com> (raw)
In-Reply-To: <20230718083813.3416104-4-davemarchevsky@fb.com>
Hi Dave,
kernel test robot noticed the following build warnings:
[auto build test WARNING on bpf-next/master]
url: https://github.com/intel-lab-lkp/linux/commits/Dave-Marchevsky/Revert-bpf-Disable-bpf_refcount_acquire-kfunc-calls-until-race-conditions-are-fixed/20230718-180801
base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master
patch link: https://lore.kernel.org/r/20230718083813.3416104-4-davemarchevsky%40fb.com
patch subject: [PATCH v2 bpf-next 3/6] bpf: Add 'owner' field to bpf_{list,rb}_node
config: alpha-randconfig-r082-20230716 (https://download.01.org/0day-ci/archive/20230719/202307192025.5vigLEcy-lkp@intel.com/config)
compiler: alpha-linux-gcc (GCC) 12.3.0
reproduce: (https://download.01.org/0day-ci/archive/20230719/202307192025.5vigLEcy-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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202307192025.5vigLEcy-lkp@intel.com/
sparse warnings: (new ones prefixed by >>)
kernel/bpf/helpers.c: note: in included file (through arch/alpha/include/asm/cmpxchg.h, arch/alpha/include/asm/atomic.h, include/linux/atomic.h, ...):
>> arch/alpha/include/asm/xchg.h:234:32: sparse: sparse: cast truncates bits from constant value (eb9f becomes 9f)
>> arch/alpha/include/asm/xchg.h:234:32: sparse: sparse: cast truncates bits from constant value (eb9f becomes 9f)
kernel/bpf/helpers.c:2419:18: sparse: sparse: context imbalance in 'bpf_rcu_read_lock' - wrong count at exit
kernel/bpf/helpers.c:2424:18: sparse: sparse: context imbalance in 'bpf_rcu_read_unlock' - unexpected unlock
vim +234 arch/alpha/include/asm/xchg.h
a6209d6d71f2ab Ivan Kokshaysky 2009-03-31 227
a6209d6d71f2ab Ivan Kokshaysky 2009-03-31 228 static __always_inline unsigned long
a6209d6d71f2ab Ivan Kokshaysky 2009-03-31 229 ____cmpxchg(, volatile void *ptr, unsigned long old, unsigned long new,
a6209d6d71f2ab Ivan Kokshaysky 2009-03-31 230 int size)
a6209d6d71f2ab Ivan Kokshaysky 2009-03-31 231 {
a6209d6d71f2ab Ivan Kokshaysky 2009-03-31 232 switch (size) {
a6209d6d71f2ab Ivan Kokshaysky 2009-03-31 233 case 1:
a6209d6d71f2ab Ivan Kokshaysky 2009-03-31 @234 return ____cmpxchg(_u8, ptr, old, new);
a6209d6d71f2ab Ivan Kokshaysky 2009-03-31 235 case 2:
a6209d6d71f2ab Ivan Kokshaysky 2009-03-31 236 return ____cmpxchg(_u16, ptr, old, new);
a6209d6d71f2ab Ivan Kokshaysky 2009-03-31 237 case 4:
a6209d6d71f2ab Ivan Kokshaysky 2009-03-31 238 return ____cmpxchg(_u32, ptr, old, new);
a6209d6d71f2ab Ivan Kokshaysky 2009-03-31 239 case 8:
a6209d6d71f2ab Ivan Kokshaysky 2009-03-31 240 return ____cmpxchg(_u64, ptr, old, new);
a6209d6d71f2ab Ivan Kokshaysky 2009-03-31 241 }
a6209d6d71f2ab Ivan Kokshaysky 2009-03-31 242 __cmpxchg_called_with_bad_pointer();
a6209d6d71f2ab Ivan Kokshaysky 2009-03-31 243 return old;
a6209d6d71f2ab Ivan Kokshaysky 2009-03-31 244 }
a6209d6d71f2ab Ivan Kokshaysky 2009-03-31 245
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
next prev parent reply other threads:[~2023-07-19 12:28 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-07-18 8:38 [PATCH v2 bpf-next 0/6] BPF Refcount followups 2: owner field Dave Marchevsky
2023-07-18 8:38 ` [PATCH v2 bpf-next 1/6] [DONOTAPPLY] Revert "bpf: Disable bpf_refcount_acquire kfunc calls until race conditions are fixed" Dave Marchevsky
2023-07-18 8:38 ` [PATCH v2 bpf-next 2/6] bpf: Introduce internal definitions for UAPI-opaque bpf_{rb,list}_node Dave Marchevsky
2023-07-18 8:38 ` [PATCH v2 bpf-next 3/6] bpf: Add 'owner' field to bpf_{list,rb}_node Dave Marchevsky
2023-07-19 11:04 ` kernel test robot
2023-07-19 12:28 ` kernel test robot [this message]
2023-07-18 8:38 ` [PATCH v2 bpf-next 4/6] selftests/bpf: Add rbtree test exercising race which 'owner' field prevents Dave Marchevsky
2023-07-18 8:38 ` [PATCH v2 bpf-next 5/6] selftests/bpf: Disable newly-added 'owner' field test until refcount re-enabled Dave Marchevsky
2023-07-18 8:38 ` [PATCH v2 bpf-next 6/6] [DONOTAPPLY] Revert "selftests/bpf: Disable newly-added 'owner' field test until refcount re-enabled" Dave Marchevsky
2023-07-19 0:30 ` [PATCH v2 bpf-next 0/6] BPF Refcount followups 2: owner field patchwork-bot+netdevbpf
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