[avpatel:riscv_defconfig_v1 54/59] include/linux/riscv_sse.h:40:16: error: implicit declaration of function 'ERR_PTR'

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

tree:   https://github.com/avpatel/linux.git riscv_defconfig_v1
head:   4fd509619498a267ba245e95fefba09eef65a97e
commit: 1246727818573869b528326a8ea0b79b7c430763 [54/59] riscv: Introduce HEST SSE notification handlers
config: x86_64-buildonly-randconfig-006-20241218 (https://download.01.org/0day-ci/archive/20241218/202412181703.Lt1RFtxU-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-12) 11.3.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241218/202412181703.Lt1RFtxU-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/202412181703.Lt1RFtxU-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from drivers/acpi/apei/ghes.c:20:
   include/linux/riscv_sse.h: In function 'sse_event_register':
>> include/linux/riscv_sse.h:40:16: error: implicit declaration of function 'ERR_PTR' [-Werror=implicit-function-declaration]
      40 |         return ERR_PTR(-EOPNOTSUPP);
         |                ^~~~~~~
>> include/linux/riscv_sse.h:40:25: error: 'EOPNOTSUPP' undeclared (first use in this function)
      40 |         return ERR_PTR(-EOPNOTSUPP);
         |                         ^~~~~~~~~~
   include/linux/riscv_sse.h:40:25: note: each undeclared identifier is reported only once for each function it appears in
   include/linux/riscv_sse.h: In function 'sse_event_set_target_cpu':
   include/linux/riscv_sse.h:48:17: error: 'EOPNOTSUPP' undeclared (first use in this function)
      48 |         return -EOPNOTSUPP;
         |                 ^~~~~~~~~~
   include/linux/riscv_sse.h: In function 'sse_event_enable':
   include/linux/riscv_sse.h:53:17: error: 'EOPNOTSUPP' undeclared (first use in this function)
      53 |         return -EOPNOTSUPP;
         |                 ^~~~~~~~~~
   include/linux/riscv_sse.h: In function 'sse_register_ghes':
   include/linux/riscv_sse.h:61:17: error: 'EOPNOTSUPP' undeclared (first use in this function)
      61 |         return -EOPNOTSUPP;
         |                 ^~~~~~~~~~
   include/linux/riscv_sse.h: In function 'sse_unregister_ghes':
   include/linux/riscv_sse.h:66:17: error: 'EOPNOTSUPP' undeclared (first use in this function)
      66 |         return -EOPNOTSUPP;
         |                 ^~~~~~~~~~
   In file included from arch/x86/include/asm/processor.h:36,
                    from arch/x86/include/asm/cpufeature.h:5,
                    from arch/x86/include/asm/thread_info.h:59,
                    from include/linux/thread_info.h:60,
                    from include/linux/spinlock.h:60,
                    from include/linux/mmzone.h:8,
                    from include/linux/gfp.h:7,
                    from include/linux/slab.h:16,
                    from include/linux/resource_ext.h:11,
                    from include/linux/acpi.h:13,
                    from include/acpi/apei.h:9,
                    from include/acpi/ghes.h:5,
                    from include/linux/arm_sdei.h:8,
                    from drivers/acpi/apei/ghes.c:21:
   include/linux/err.h: At top level:
>> include/linux/err.h:39:35: error: conflicting types for 'ERR_PTR'; have 'void *(long int)'
      39 | static inline void * __must_check ERR_PTR(long error)
         |                                   ^~~~~~~
   In file included from drivers/acpi/apei/ghes.c:20:
   include/linux/riscv_sse.h:40:16: note: previous implicit declaration of 'ERR_PTR' with type 'int()'
      40 |         return ERR_PTR(-EOPNOTSUPP);
         |                ^~~~~~~
   cc1: some warnings being treated as errors


vim +/ERR_PTR +40 include/linux/riscv_sse.h

4552a7367be3171 Clément Léger    2024-12-06  31  
72590be23472547 Himanshu Chauhan 2023-10-26  32  int sse_register_ghes(struct ghes *ghes, sse_event_handler *lo_cb,
72590be23472547 Himanshu Chauhan 2023-10-26  33  		      sse_event_handler *hi_cb);
72590be23472547 Himanshu Chauhan 2023-10-26  34  int sse_unregister_ghes(struct ghes *ghes);
4552a7367be3171 Clément Léger    2024-12-06  35  #else
4552a7367be3171 Clément Léger    2024-12-06  36  static inline struct sse_event *sse_event_register(u32 event_num, u32 priority,
4552a7367be3171 Clément Léger    2024-12-06  37  						   sse_event_handler *handler,
4552a7367be3171 Clément Léger    2024-12-06  38  						   void *arg)
4552a7367be3171 Clément Léger    2024-12-06  39  {
4552a7367be3171 Clément Léger    2024-12-06 @40  	return ERR_PTR(-EOPNOTSUPP);
4552a7367be3171 Clément Léger    2024-12-06  41  }
4552a7367be3171 Clément Léger    2024-12-06  42  

:::::: The code at line 40 was first introduced by commit
:::::: 4552a7367be31713c5e06313f2a8e7233aceaafd drivers: firmware: add riscv SSE support

:::::: TO: Clément Léger <cleger@rivosinc.com>
:::::: CC: Anup Patel <anup@brainfault.org>

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https://github.com/intel/lkp-tests/wiki