Re: [PATCH v8 3/8] riscv: add ptrace requests for hardware breakpoints

[kernel test robot <lkp@intel.com>]

Hi Himanshu,

kernel test robot noticed the following build errors:

[auto build test ERROR on shuah-kselftest/next]
[also build test ERROR on shuah-kselftest/fixes perf-tools-next/perf-tools-next linus/master v7.4-rc1 next-20261105]
[cannot apply to kees/for-next/execve tip/perf/core perf-tools/perf-tools acme/perf/core]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Himanshu-Chauhan/riscv-Introduce-support-for-hardware-break-watchpoints/20261107-080910
base:   https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git next
patch link:    https://lore.kernel.org/r/20261107023917.40606-4-himanshu.chauhan%40oss.qualcomm.com
patch subject: [PATCH v8 3/8] riscv: add ptrace requests for hardware breakpoints
config: riscv-allnoconfig (https://download.01.org/0day-ci/archive/20261107/202611071408.gyIRvq10-lkp@intel.com/config)
compiler: riscv64-linux-gcc (GCC) 16.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20261107/202611071408.gyIRvq10-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/202611071408.gyIRvq10-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from kernel/exit.c:57:
>> include/linux/hw_breakpoint.h:137:20: error: redefinition of 'flush_ptrace_hw_breakpoint'
     137 | static inline void flush_ptrace_hw_breakpoint(struct task_struct *tsk)  { }
         |                    ^~~~~~~~~~~~~~~~~~~~~~~~~~
   In file included from arch/riscv/include/asm/processor.h:18,
                    from arch/riscv/include/asm/cmpxchg.h:16,
                    from arch/riscv/include/asm/barrier.h:14,
                    from include/asm-generic/bitops/generic-non-atomic.h:7,
                    from include/linux/bitops.h:28,
                    from include/linux/thread_info.h:27,
                    from include/asm-generic/preempt.h:5,
                    from ./arch/riscv/include/generated/asm/preempt.h:1,
                    from include/linux/preempt.h:107,
                    from include/linux/spinlock.h:56,
                    from include/linux/mmzone.h:8,
                    from include/linux/gfp.h:7,
                    from include/linux/mm.h:8,
                    from kernel/exit.c:8:
   arch/riscv/include/asm/hw_breakpoint.h:58:20: note: previous definition of 'flush_ptrace_hw_breakpoint' with type 'void(struct task_struct *)'
      58 | static inline void flush_ptrace_hw_breakpoint(struct task_struct *task) { }
         |                    ^~~~~~~~~~~~~~~~~~~~~~~~~~


vim +/flush_ptrace_hw_breakpoint +137 include/linux/hw_breakpoint.h

24f1e32c60c45c include/linux/hw_breakpoint.h       Frederic Weisbecker 2009-09-09  136  
24f1e32c60c45c include/linux/hw_breakpoint.h       Frederic Weisbecker 2009-09-09 @137  static inline void flush_ptrace_hw_breakpoint(struct task_struct *tsk)	{ }
b332828c39326b include/asm-generic/hw_breakpoint.h K.Prasad            2009-06-01  138  

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