[PATCH v4 2/2] Allow for riscv-clock to pick up mmio address.

[kernel test robot]

Hi Aleksa,

kernel test robot noticed the following build errors:

[auto build test ERROR on 9c32cda43eb78f78c73aee4aa344b777714e259b]

url:    https://github.com/intel-lab-lkp/linux/commits/Aleksa-Paunovic-via-B4-Relay/dt-bindings-timer-mti-gcru/20250514-165347
base:   9c32cda43eb78f78c73aee4aa344b777714e259b
patch link:    https://lore.kernel.org/r/20250514-riscv-time-mmio-v4-2-cb0cf2922d66%40htecgroup.com
patch subject: [PATCH v4 2/2] Allow for riscv-clock to pick up mmio address.
config: riscv-randconfig-001-20250515 (https://download.01.org/0day-ci/archive/20250515/202505150913.Iq1XRKqC-lkp@intel.com/config)
compiler: riscv32-linux-gcc (GCC) 8.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250515/202505150913.Iq1XRKqC-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 at intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202505150913.Iq1XRKqC-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from include/linux/timex.h:67,
                    from include/linux/time32.h:13,
                    from include/linux/time.h:60,
                    from include/linux/jiffies.h:10,
                    from include/linux/ktime.h:25,
                    from include/linux/timer.h:6,
                    from include/linux/uprobes.h:18,
                    from include/linux/mm_types.h:16,
                    from include/linux/mmzone.h:22,
                    from include/linux/gfp.h:7,
                    from include/linux/mm.h:7,
                    from arch/riscv/kernel/asm-offsets.c:8:
   arch/riscv/include/asm/timex.h: In function 'random_get_entropy':
>> arch/riscv/include/asm/timex.h:39:9: error: implicit declaration of function 'get_cycles'; did you mean 'get_cycles_ptr'? [-Werror=implicit-function-declaration]
     return get_cycles();
            ^~~~~~~~~~
            get_cycles_ptr
   arch/riscv/include/asm/timex.h: In function 'get_cycles64':
>> arch/riscv/include/asm/timex.h:45:23: error: implicit declaration of function 'get_cycles_ptr_hi'; did you mean 'get_cycles_ptr'? [-Werror=implicit-function-declaration]
    #define get_cycles_hi get_cycles_ptr_hi
                          ^~~~~~~~~~~~~~~~~
   arch/riscv/include/asm/timex.h:58:8: note: in expansion of macro 'get_cycles_hi'
      hi = get_cycles_hi();
           ^~~~~~~~~~~~~
   cc1: some warnings being treated as errors
   make[3]: *** [scripts/Makefile.build:98: arch/riscv/kernel/asm-offsets.s] Error 1 shuffle=2386734513
   make[3]: Target 'prepare' not remade because of errors.
   make[2]: *** [Makefile:1282: prepare0] Error 2 shuffle=2386734513
   make[2]: Target 'prepare' not remade because of errors.
   make[1]: *** [Makefile:248: __sub-make] Error 2 shuffle=2386734513
   make[1]: Target 'prepare' not remade because of errors.
   make: *** [Makefile:248: __sub-make] Error 2 shuffle=2386734513
   make: Target 'prepare' not remade because of errors.


vim +39 arch/riscv/include/asm/timex.h

d5be89a8d118a8 Palmer Dabbelt     2020-09-14  29  
aa9887608e77b8 Anup Patel         2020-09-27  30  /*
aa9887608e77b8 Anup Patel         2020-09-27  31   * Much like MIPS, we may not have a viable counter to use at an early point
aa9887608e77b8 Anup Patel         2020-09-27  32   * in the boot process. Unfortunately we don't have a fallback, so instead
aa9887608e77b8 Anup Patel         2020-09-27  33   * we just return 0.
aa9887608e77b8 Anup Patel         2020-09-27  34   */
aa9887608e77b8 Anup Patel         2020-09-27  35  static inline unsigned long random_get_entropy(void)
aa9887608e77b8 Anup Patel         2020-09-27  36  {
aa9887608e77b8 Anup Patel         2020-09-27  37  	if (unlikely(clint_time_val == NULL))
6d01238623faa9 Jason A. Donenfeld 2022-04-08  38  		return random_get_entropy_fallback();
aa9887608e77b8 Anup Patel         2020-09-27 @39  	return get_cycles();
aa9887608e77b8 Anup Patel         2020-09-27  40  }
aa9887608e77b8 Anup Patel         2020-09-27  41  #define random_get_entropy()	random_get_entropy()
7eeda0113dff84 Aleksa Paunovic    2025-05-14  42  #endif
aa9887608e77b8 Anup Patel         2020-09-27  43  
7eeda0113dff84 Aleksa Paunovic    2025-05-14  44  #define get_cycles get_cycles_ptr
7eeda0113dff84 Aleksa Paunovic    2025-05-14 @45  #define get_cycles_hi get_cycles_ptr_hi
ccbbfd1cbf365b Palmer Dabbelt     2020-11-25  46  

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