linux-kernel - [robh:mpam/cache-id 12/12] arch/x86/kernel/devicetree.c:142:6: error: unused variable 'ret'

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Date:   Sat, 6 Nov 2021 23:00:11 +0800
From:   kernel test robot <lkp@...el.com>
To:     Rob Herring <robh@...nel.org>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: [robh:mpam/cache-id 12/12] arch/x86/kernel/devicetree.c:142:6:
 error: unused variable 'ret'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git mpam/cache-id
head:   4dec66d0c19165b654cca2ce8810615f61709693
commit: 4dec66d0c19165b654cca2ce8810615f61709693 [12/12] x86: Use of_get_cpu_hwid()
config: i386-allyesconfig (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git/commit/?id=4dec66d0c19165b654cca2ce8810615f61709693
        git remote add robh https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git
        git fetch --no-tags robh mpam/cache-id
        git checkout 4dec66d0c19165b654cca2ce8810615f61709693
        # save the attached .config to linux build tree
        make W=1 ARCH=i386 

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

All errors (new ones prefixed by >>):

   arch/x86/kernel/devicetree.c: In function 'dtb_cpu_setup':
>> arch/x86/kernel/devicetree.c:142:6: error: unused variable 'ret' [-Werror=unused-variable]
     142 |  int ret;
         |      ^~~
   cc1: all warnings being treated as errors


vim +/ret +142 arch/x86/kernel/devicetree.c

4e07db9c8db87e Ivan Gorinov 2018-03-22  137  
4e07db9c8db87e Ivan Gorinov 2018-03-22  138  static void __init dtb_cpu_setup(void)
4e07db9c8db87e Ivan Gorinov 2018-03-22  139  {
4e07db9c8db87e Ivan Gorinov 2018-03-22  140  	struct device_node *dn;
4e07db9c8db87e Ivan Gorinov 2018-03-22  141  	u32 apic_id, version;
4e07db9c8db87e Ivan Gorinov 2018-03-22 @142  	int ret;
4e07db9c8db87e Ivan Gorinov 2018-03-22  143  
4e07db9c8db87e Ivan Gorinov 2018-03-22  144  	version = GET_APIC_VERSION(apic_read(APIC_LVR));
7de8f4aa2f3558 Rob Herring  2018-08-27  145  	for_each_of_cpu_node(dn) {
4dec66d0c19165 Rob Herring  2021-10-05  146  		apic_id = of_get_cpu_hwid(dn, 0);
4dec66d0c19165 Rob Herring  2021-10-05  147  		if (apic_id == ~0U) {
4e07db9c8db87e Ivan Gorinov 2018-03-22  148  			pr_warn("%pOF: missing local APIC ID\n", dn);
4e07db9c8db87e Ivan Gorinov 2018-03-22  149  			continue;
4e07db9c8db87e Ivan Gorinov 2018-03-22  150  		}
4e07db9c8db87e Ivan Gorinov 2018-03-22  151  		generic_processor_info(apic_id, version);
4e07db9c8db87e Ivan Gorinov 2018-03-22  152  	}
4e07db9c8db87e Ivan Gorinov 2018-03-22  153  }
4e07db9c8db87e Ivan Gorinov 2018-03-22  154  

:::::: The code at line 142 was first introduced by commit
:::::: 4e07db9c8db87e3b71be4c3cd626ddc9bacd5a1e x86/devicetree: Use CPU description from Device Tree

:::::: TO: Ivan Gorinov <ivan.gorinov@...el.com>
:::::: CC: Thomas Gleixner <tglx@...utronix.de>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

Download attachment ".config.gz" of type "application/gzip" (66028 bytes)