From: kernel test robot <lkp@intel.com>
To: Uros Bizjak <ubizjak@gmail.com>
Cc: oe-kbuild-all@lists.linux.dev, linux-kernel@vger.kernel.org,
x86@kernel.org, Ingo Molnar <mingo@kernel.org>,
Nadav Amit <namit@vmware.com>
Subject: [tip:x86/percpu 21/22] arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
Date: Thu, 30 Nov 2023 22:14:04 +0800 [thread overview]
Message-ID: <202311302257.tSFtZnly-lkp@intel.com> (raw)
tree: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86/percpu
head: 0548eb067ed664b93043e033295ca71e3e706245
commit: ed2f752e0e0a21d941ca0ee539ef3d4cd576bc5e [21/22] x86/percpu: Introduce const-qualified const_pcpu_hot to micro-optimize code generation
config: i386-randconfig-062-20231025 (https://download.01.org/0day-ci/archive/20231130/202311302257.tSFtZnly-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231130/202311302257.tSFtZnly-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/202311302257.tSFtZnly-lkp@intel.com/
sparse warnings: (new ones prefixed by >>)
arch/x86/kernel/fpu/init.c: note: in included file (through arch/x86/include/asm/preempt.h, include/linux/preempt.h, include/linux/bottom_half.h, ...):
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
--
arch/x86/kernel/fpu/regset.c: note: in included file (through include/linux/sched.h, include/linux/sched/task_stack.h):
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
--
arch/x86/kernel/fpu/signal.c: note: in included file (through arch/x86/include/asm/nospec-branch.h, arch/x86/include/asm/paravirt_types.h, arch/x86/include/asm/ptrace.h, ...):
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
--
arch/x86/kernel/fpu/core.c: note: in included file (through arch/x86/include/asm/preempt.h, include/linux/preempt.h, include/linux/bottom_half.h, ...):
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
arch/x86/kernel/fpu/core.c:547:39: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct spinlock [usertype] *lock @@ got struct spinlock [noderef] __rcu * @@
arch/x86/kernel/fpu/core.c:547:39: sparse: expected struct spinlock [usertype] *lock
arch/x86/kernel/fpu/core.c:547:39: sparse: got struct spinlock [noderef] __rcu *
arch/x86/kernel/fpu/core.c:551:41: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct spinlock [usertype] *lock @@ got struct spinlock [noderef] __rcu * @@
arch/x86/kernel/fpu/core.c:551:41: sparse: expected struct spinlock [usertype] *lock
arch/x86/kernel/fpu/core.c:551:41: sparse: got struct spinlock [noderef] __rcu *
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
--
arch/x86/kernel/fpu/xstate.c: note: in included file (through arch/x86/include/asm/nospec-branch.h, arch/x86/include/asm/paravirt_types.h, arch/x86/include/asm/ptrace.h, ...):
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
arch/x86/kernel/fpu/xstate.c: note: in included file (through arch/x86/include/asm/fpu/regset.h):
include/linux/regset.h:28:28: sparse: sparse: self-comparison always evaluates to false
arch/x86/kernel/fpu/xstate.c: note: in included file (through arch/x86/include/asm/nospec-branch.h, arch/x86/include/asm/paravirt_types.h, arch/x86/include/asm/ptrace.h, ...):
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
>> arch/x86/include/asm/current.h:46:24: sparse: sparse: dereference of noderef expression
vim +46 arch/x86/include/asm/current.h
38
39 /* const-qualified alias to pcpu_hot, aliased by linker. */
40 DECLARE_PER_CPU_ALIGNED(const struct pcpu_hot __percpu_seg_override,
41 const_pcpu_hot);
42
43 static __always_inline struct task_struct *get_current(void)
44 {
45 if (IS_ENABLED(CONFIG_USE_X86_SEG_SUPPORT))
> 46 return const_pcpu_hot.current_task;
47
48 return this_cpu_read_stable(pcpu_hot.current_task);
49 }
50
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
reply other threads:[~2023-11-30 14:15 UTC|newest]
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