Re: [PATCH] of: of_reserved_mem: clean-up reserved memory with no-map

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

Hi,

kernel test robot noticed the following build warnings:

[auto build test WARNING on robh/for-next]
[also build test WARNING on linus/master v6.9-rc6 next-20240430]
[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/skseofh-gmail-com/of-of_reserved_mem-clean-up-reserved-memory-with-no-map/20240430-144643
base:   https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next
patch link:    https://lore.kernel.org/r/20240428125505.434962-1-skseofh%40gmail.com
patch subject: [PATCH] of: of_reserved_mem: clean-up reserved memory with no-map
config: openrisc-allnoconfig (https://download.01.org/0day-ci/archive/20240501/202405010907.PHM9xSMi-lkp@intel.com/config)
compiler: or1k-linux-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240501/202405010907.PHM9xSMi-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/202405010907.PHM9xSMi-lkp@intel.com/

All warnings (new ones prefixed by >>):

   drivers/of/of_reserved_mem.c: In function 'early_init_dt_reserve_memory':
>> drivers/of/of_reserved_mem.c:95:25: warning: 'return' with no value, in function returning non-void [-Wreturn-type]
      95 |                         return;
         |                         ^~~~~~
   drivers/of/of_reserved_mem.c:81:19: note: declared here
      81 | static int __init early_init_dt_reserve_memory(phys_addr_t base,
         |                   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~


vim +/return +95 drivers/of/of_reserved_mem.c

    80	
    81	static int __init early_init_dt_reserve_memory(phys_addr_t base,
    82						       phys_addr_t size, bool nomap)
    83	{
    84		if (nomap) {
    85			/*
    86			 * If the memory is already reserved (by another region), we
    87			 * should not allow it to be marked nomap, but don't worry
    88			 * if the region isn't memory as it won't be mapped.
    89			 */
    90			if (memblock_overlaps_region(&memblock.memory, base, size) &&
    91			    memblock_is_region_reserved(base, size))
    92				return -EBUSY;
    93	
    94			if (memblock_mark_nomap(base, size))
  > 95				return;
    96		}
    97		return memblock_reserve(base, size);
    98	}
    99	

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