linux-kernel - [tip:irq/core 8/9] lib/group_cpus.c:43:23: warning: unused function 'alloc_node_to

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Message-ID: <202301182158.GgENalyU-lkp@intel.com>
Date:   Wed, 18 Jan 2023 21:34:23 +0800
From:   kernel test robot <lkp@...el.com>
To:     Ming Lei <ming.lei@...hat.com>
Cc:     llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
        linux-kernel@...r.kernel.org, x86@...nel.org,
        Thomas Gleixner <tglx@...utronix.de>,
        Christoph Hellwig <hch@....de>, Jens Axboe <axboe@...nel.dk>
Subject: [tip:irq/core 8/9] lib/group_cpus.c:43:23: warning: unused function
 'alloc_node_to_cpumask'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git irq/core
head:   6a6dcae8f486c3f3298d0767d34505121c7b0b81
commit: f7b3ea8cf72f3d6060fe08e461805181e7450a13 [8/9] genirq/affinity: Move group_cpus_evenly() into lib/
config: i386-randconfig-a003-20230116 (https://download.01.org/0day-ci/archive/20230118/202301182158.GgENalyU-lkp@intel.com/config)
compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project f28c006a5895fc0e329fe15fead81e37457cb1d1)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=f7b3ea8cf72f3d6060fe08e461805181e7450a13
        git remote add tip https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git
        git fetch --no-tags tip irq/core
        git checkout f7b3ea8cf72f3d6060fe08e461805181e7450a13
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=i386 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=i386 SHELL=/bin/bash

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@...el.com>

All warnings (new ones prefixed by >>):

>> lib/group_cpus.c:43:23: warning: unused function 'alloc_node_to_cpumask' [-Wunused-function]
   static cpumask_var_t *alloc_node_to_cpumask(void)
                         ^
>> lib/group_cpus.c:66:13: warning: unused function 'free_node_to_cpumask' [-Wunused-function]
   static void free_node_to_cpumask(cpumask_var_t *masks)
               ^
>> lib/group_cpus.c:75:13: warning: unused function 'build_node_to_cpumask' [-Wunused-function]
   static void build_node_to_cpumask(cpumask_var_t *masks)
               ^
>> lib/group_cpus.c:247:12: warning: unused function '__group_cpus_evenly' [-Wunused-function]
   static int __group_cpus_evenly(unsigned int startgrp, unsigned int numgrps,
              ^
   4 warnings generated.


vim +/alloc_node_to_cpumask +43 lib/group_cpus.c

    42	
  > 43	static cpumask_var_t *alloc_node_to_cpumask(void)
    44	{
    45		cpumask_var_t *masks;
    46		int node;
    47	
    48		masks = kcalloc(nr_node_ids, sizeof(cpumask_var_t), GFP_KERNEL);
    49		if (!masks)
    50			return NULL;
    51	
    52		for (node = 0; node < nr_node_ids; node++) {
    53			if (!zalloc_cpumask_var(&masks[node], GFP_KERNEL))
    54				goto out_unwind;
    55		}
    56	
    57		return masks;
    58	
    59	out_unwind:
    60		while (--node >= 0)
    61			free_cpumask_var(masks[node]);
    62		kfree(masks);
    63		return NULL;
    64	}
    65	
  > 66	static void free_node_to_cpumask(cpumask_var_t *masks)
    67	{
    68		int node;
    69	
    70		for (node = 0; node < nr_node_ids; node++)
    71			free_cpumask_var(masks[node]);
    72		kfree(masks);
    73	}
    74	
  > 75	static void build_node_to_cpumask(cpumask_var_t *masks)
    76	{
    77		int cpu;
    78	
    79		for_each_possible_cpu(cpu)
    80			cpumask_set_cpu(cpu, masks[cpu_to_node(cpu)]);
    81	}
    82	

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