[openeuler:OLK-5.10 5685/30000] arch/arm64/mm/quick_kexec.c:21:13: warning: no previous prototype for 'reserve_quick_kexec'

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

Hi Kefeng,

FYI, the error/warning was bisected to this commit, please ignore it if it's irrelevant.

tree:   https://gitee.com/openeuler/kernel.git OLK-5.10
head:   7c98201b2598a42ac2ce6a9036ee4e4349a406ac
commit: d61f4ca086e99bb481961b1120e10e7a4296c392 [5685/30000] arm64: quick_kexec: Move to stand-alone file
config: arm64-randconfig-004-20240912 (https://download.01.org/0day-ci/archive/20240912/202409121642.JnGeDDHC-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 14.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240912/202409121642.JnGeDDHC-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/202409121642.JnGeDDHC-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> arch/arm64/mm/quick_kexec.c:21:13: warning: no previous prototype for 'reserve_quick_kexec' [-Wmissing-prototypes]
      21 | void __init reserve_quick_kexec(void)
         |             ^~~~~~~~~~~~~~~~~~~
>> arch/arm64/mm/quick_kexec.c:47:13: warning: no previous prototype for 'request_quick_kexec_res' [-Wmissing-prototypes]
      47 | void __init request_quick_kexec_res(struct resource *res)
         |             ^~~~~~~~~~~~~~~~~~~~~~~

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for PGP_KEY_PARSER
   Depends on [n]: CRYPTO [=y] && ASYMMETRIC_KEY_TYPE [=y] && ASYMMETRIC_PUBLIC_KEY_SUBTYPE [=n]
   Selected by [y]:
   - PGP_PRELOAD [=y] && CRYPTO [=y] && ASYMMETRIC_KEY_TYPE [=y]


vim +/reserve_quick_kexec +21 arch/arm64/mm/quick_kexec.c

    20	
  > 21	void __init reserve_quick_kexec(void)
    22	{
    23		unsigned long long mem_start, mem_len;
    24	
    25		mem_len = quick_kexec_res.end;
    26		if (mem_len == 0)
    27			return;
    28	
    29		/* Current arm64 boot protocol requires 2MB alignment */
    30		mem_start = memblock_find_in_range(0, arm64_dma_phys_limit,
    31				mem_len, SZ_2M);
    32		if (mem_start == 0) {
    33			pr_warn("cannot allocate quick kexec mem (size:0x%llx)\n",
    34				mem_len);
    35			quick_kexec_res.end = 0;
    36			return;
    37		}
    38	
    39		memblock_reserve(mem_start, mem_len);
    40		pr_info("quick kexec mem reserved: 0x%016llx - 0x%016llx (%lld MB)\n",
    41			mem_start, mem_start + mem_len,	mem_len >> 20);
    42	
    43		quick_kexec_res.start = mem_start;
    44		quick_kexec_res.end = mem_start + mem_len - 1;
    45	}
    46	
  > 47	void __init request_quick_kexec_res(struct resource *res)

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