linux-kernel - Re: [PATCH] riscv: Only consider swbp/ss handlers for correct privileged mode

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Message-ID: <202308271841.HlnnHFL7-lkp@intel.com>
Date:   Sun, 27 Aug 2023 18:46:48 +0800
From:   kernel test robot <lkp@...el.com>
To:     Björn Töpel <bjorn@...nel.org>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        linux-riscv@...ts.infradead.org, Guo Ren <guoren@...nel.org>
Cc:     llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
        Björn Töpel <bjorn@...osinc.com>,
        linux-kernel@...r.kernel.org, linux-trace-kernel@...r.kernel.org,
        Nam Cao <namcaov@...il.com>
Subject: Re: [PATCH] riscv: Only consider swbp/ss handlers for correct
 privileged mode

Hi Björn,

kernel test robot noticed the following build warnings:

[auto build test WARNING on 7d2f353b2682dcfe5f9bc71e5b61d5b61770d98e]

url:    https://github.com/intel-lab-lkp/linux/commits/Bj-rn-T-pel/riscv-Only-consider-swbp-ss-handlers-for-correct-privileged-mode/20230827-164313
base:   7d2f353b2682dcfe5f9bc71e5b61d5b61770d98e
patch link:    https://lore.kernel.org/r/20230827083949.204927-1-bjorn%40kernel.org
patch subject: [PATCH] riscv: Only consider swbp/ss handlers for correct privileged mode
config: riscv-randconfig-001-20230827 (https://download.01.org/0day-ci/archive/20230827/202308271841.HlnnHFL7-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project.git 4a5ac14ee968ff0ad5d2cc1ffa0299048db4c88a)
reproduce: (https://download.01.org/0day-ci/archive/20230827/202308271841.HlnnHFL7-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/202308271841.HlnnHFL7-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from kernel/sched/core.c:49:
   In file included from include/linux/kprobes.h:32:
>> arch/riscv/include/asm/kprobes.h:44:62: warning: omitting the parameter name in a function definition is a C2x extension [-Wc2x-extensions]
      44 | static inline bool kprobe_breakpoint_handler(struct pt_regs *)
         |                                                              ^
   arch/riscv/include/asm/kprobes.h:49:63: warning: omitting the parameter name in a function definition is a C2x extension [-Wc2x-extensions]
      49 | static inline bool kprobe_single_step_handler(struct pt_regs *)
         |                                                               ^
   kernel/sched/core.c:3695:20: warning: unused function 'rq_has_pinned_tasks' [-Wunused-function]
    3695 | static inline bool rq_has_pinned_tasks(struct rq *rq)
         |                    ^
   kernel/sched/core.c:5821:20: warning: unused function 'sched_tick_start' [-Wunused-function]
    5821 | static inline void sched_tick_start(int cpu) { }
         |                    ^
   kernel/sched/core.c:5822:20: warning: unused function 'sched_tick_stop' [-Wunused-function]
    5822 | static inline void sched_tick_stop(int cpu) { }
         |                    ^
   kernel/sched/core.c:6522:20: warning: unused function 'sched_core_cpu_starting' [-Wunused-function]
    6522 | static inline void sched_core_cpu_starting(unsigned int cpu) {}
         |                    ^
   kernel/sched/core.c:6523:20: warning: unused function 'sched_core_cpu_deactivate' [-Wunused-function]
    6523 | static inline void sched_core_cpu_deactivate(unsigned int cpu) {}
         |                    ^
   kernel/sched/core.c:6524:20: warning: unused function 'sched_core_cpu_dying' [-Wunused-function]
    6524 | static inline void sched_core_cpu_dying(unsigned int cpu) {}
         |                    ^
   8 warnings generated.


vim +44 arch/riscv/include/asm/kprobes.h

    38	
    39	void arch_remove_kprobe(struct kprobe *p);
    40	int kprobe_fault_handler(struct pt_regs *regs, unsigned int trapnr);
    41	bool kprobe_breakpoint_handler(struct pt_regs *regs);
    42	bool kprobe_single_step_handler(struct pt_regs *regs);
    43	#else
  > 44	static inline bool kprobe_breakpoint_handler(struct pt_regs *)
    45	{
    46		return false;
    47	}
    48	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki