linux-kernel - [avpatel:riscv_kvm_aia_v1 30/42] drivers/irqchip/irq-riscv-imsic.c:142:30: warning: variable 'global' set but not used

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Date:   Fri, 31 Dec 2021 17:23:31 +0800
From:   kernel test robot <lkp@...el.com>
To:     Anup Patel <anup.patel@....com>
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org
Subject: [avpatel:riscv_kvm_aia_v1 30/42]
 drivers/irqchip/irq-riscv-imsic.c:142:30: warning: variable 'global' set but
 not used

tree:   https://github.com/avpatel/linux.git riscv_kvm_aia_v1
head:   6fa93cde61f5f84422bd3f97b9db6e2406a344dd
commit: 608f1fa0b6d8185a467e90300c3279f63214e7b7 [30/42] irqchip: Add RISC-V incoming MSI controller driver
config: riscv-randconfig-r042-20211231 (https://download.01.org/0day-ci/archive/20211231/202112311701.yUVrwIaS-lkp@intel.com/config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 7cd109b92c72855937273a6c8ab19016fbe27d33)
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
        # install riscv cross compiling tool for clang build
        # apt-get install binutils-riscv64-linux-gnu
        # https://github.com/avpatel/linux/commit/608f1fa0b6d8185a467e90300c3279f63214e7b7
        git remote add avpatel https://github.com/avpatel/linux.git
        git fetch --no-tags avpatel riscv_kvm_aia_v1
        git checkout 608f1fa0b6d8185a467e90300c3279f63214e7b7
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=riscv SHELL=/bin/bash drivers/irqchip/

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

All warnings (new ones prefixed by >>):

>> drivers/irqchip/irq-riscv-imsic.c:142:30: warning: variable 'global' set but not used [-Wunused-but-set-variable]
           struct imsic_global_config *global;
                                       ^
   drivers/irqchip/irq-riscv-imsic.c:138:22: warning: unused function 'imsic_cpu_page_virt' [-Wunused-function]
   static void __iomem *imsic_cpu_page_virt(unsigned int cpu,
                        ^
   2 warnings generated.


vim +/global +142 drivers/irqchip/irq-riscv-imsic.c

   137	
   138	static void __iomem *imsic_cpu_page_virt(unsigned int cpu,
   139						 unsigned int guest_index)
   140	{
   141		struct imsic_handler *handler = per_cpu_ptr(&imsic_handlers, cpu);
 > 142		struct imsic_global_config *global;
   143		struct imsic_local_config *local;
   144	
   145		if (!handler || !handler->priv)
   146			return NULL;
   147		local = &handler->local;
   148		global = &handler->priv->global;
   149	
   150		return local->msi_va + (guest_index * IMSIC_MMIO_PAGE_SZ);
   151	}
   152	

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