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Date:   Wed, 13 Dec 2023 19:22:33 +0800
From:   kernel test robot <lkp@intel.com>
To:     Alexander Graf <graf@amazon.com>, linux-kernel@vger.kernel.org
Cc:     llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev,
        linux-trace-kernel@vger.kernel.org, linux-mm@kvack.org,
        devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        kexec@lists.infradead.org, linux-doc@vger.kernel.org,
        x86@kernel.org, Eric Biederman <ebiederm@xmission.com>,
        "H. Peter Anvin" <hpa@zytor.com>,
        Andy Lutomirski <luto@kernel.org>,
        Rob Herring <robh+dt@kernel.org>,
        Steven Rostedt <rostedt@goodmis.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Mark Rutland <mark.rutland@arm.com>,
        Tom Lendacky <thomas.lendacky@amd.com>,
        Ashish Kalra <ashish.kalra@amd.com>,
        James Gowans <jgowans@amazon.com>,
        Stanislav Kinsburskii <skinsburskii@linux.microsoft.com>,
        arnd@arndb.de, pbonzini@redhat.com, madvenka@linux.microsoft.com,
        Anthony Yznaga <anthony.yznaga@oracle.com>,
        Usama Arif <usama.arif@bytedance.com>,
        David Woodhouse <dwmw@amazon.co.uk>,
        Benjamin Herrenschmidt <benh@kernel.crashing.org>
Subject: Re: [PATCH 06/15] arm64: Add KHO support
Message-ID: <202312131958.BJ7skdaN-lkp@intel.com>
References: <20231213000452.88295-7-graf@amazon.com>
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In-Reply-To: <20231213000452.88295-7-graf@amazon.com>
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Hi Alexander,

kernel test robot noticed the following build warnings:

[auto build test WARNING on tip/x86/core]
[also build test WARNING on arm64/for-next/core akpm-mm/mm-everything linus/master v6.7-rc5 next-20231213]
[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/Alexander-Graf/mm-memblock-Add-support-for-scratch-memory/20231213-080941
base:   tip/x86/core
patch link:    https://lore.kernel.org/r/20231213000452.88295-7-graf%40amazon.com
patch subject: [PATCH 06/15] arm64: Add KHO support
config: i386-buildonly-randconfig-001-20231213 (https://download.01.org/0day-ci/archive/20231213/202312131958.BJ7skdaN-lkp@intel.com/config)
compiler: clang version 16.0.4 (https://github.com/llvm/llvm-project.git ae42196bc493ffe877a7e3dff8be32035dea4d07)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231213/202312131958.BJ7skdaN-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/202312131958.BJ7skdaN-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/of/fdt.c:1012:13: warning: no previous prototype for function 'early_init_dt_check_kho' [-Wmissing-prototypes]
   void __init early_init_dt_check_kho(void)
               ^
   drivers/of/fdt.c:1012:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void __init early_init_dt_check_kho(void)
   ^
   static 
   1 warning generated.


vim +/early_init_dt_check_kho +1012 drivers/of/fdt.c

  1008	
  1009	/**
  1010	 * early_init_dt_check_kho - Decode info required for kexec handover from DT
  1011	 */
> 1012	void __init early_init_dt_check_kho(void)
  1013	{
  1014	#ifdef CONFIG_KEXEC_KHO
  1015		unsigned long node = chosen_node_offset;
  1016		u64 kho_start, scratch_start, scratch_size, mem_start, mem_size;
  1017		const __be32 *p;
  1018		int l;
  1019	
  1020		if ((long)node < 0)
  1021			return;
  1022	
  1023		p = of_get_flat_dt_prop(node, "linux,kho-dt", &l);
  1024		if (l != (dt_root_addr_cells + dt_root_size_cells) * sizeof(__be32))
  1025			return;
  1026	
  1027		kho_start = dt_mem_next_cell(dt_root_addr_cells, &p);
  1028	
  1029		p = of_get_flat_dt_prop(node, "linux,kho-scratch", &l);
  1030		if (l != (dt_root_addr_cells + dt_root_size_cells) * sizeof(__be32))
  1031			return;
  1032	
  1033		scratch_start = dt_mem_next_cell(dt_root_addr_cells, &p);
  1034		scratch_size = dt_mem_next_cell(dt_root_addr_cells, &p);
  1035	
  1036		p = of_get_flat_dt_prop(node, "linux,kho-mem", &l);
  1037		if (l != (dt_root_addr_cells + dt_root_size_cells) * sizeof(__be32))
  1038			return;
  1039	
  1040		mem_start = dt_mem_next_cell(dt_root_addr_cells, &p);
  1041		mem_size = dt_mem_next_cell(dt_root_addr_cells, &p);
  1042	
  1043		kho_populate(kho_start, scratch_start, scratch_size, mem_start, mem_size);
  1044	#endif
  1045	}
  1046	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki