linux-kernel - [csky-linux:riscv_compat_v6 13/20] arch/riscv/kernel/process.c:102:35: error: use of undeclared identifier 'SR

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Message-ID: <202202242346.yPxgaryD-lkp@intel.com>
Date:   Thu, 24 Feb 2022 23:40:58 +0800
From:   kernel test robot <lkp@...el.com>
To:     Guo Ren <guoren@...ux.alibaba.com>
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org
Subject: [csky-linux:riscv_compat_v6 13/20]
 arch/riscv/kernel/process.c:102:35: error: use of undeclared identifier
 'SR_UXL'

tree:   https://github.com/c-sky/csky-linux riscv_compat_v6
head:   4aafa1859382d5a159bdafe2956453feafd38845
commit: 4cebbf9e791522be5b6e7cea289ab1c43c66cbc0 [13/20] riscv: compat: process: Add UXL_32 support in start_thread
config: riscv-buildonly-randconfig-r003-20220223 (https://download.01.org/0day-ci/archive/20220224/202202242346.yPxgaryD-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project d271fc04d5b97b12e6b797c6067d3c96a8d7470e)
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/c-sky/csky-linux/commit/4cebbf9e791522be5b6e7cea289ab1c43c66cbc0
        git remote add csky-linux https://github.com/c-sky/csky-linux
        git fetch --no-tags csky-linux riscv_compat_v6
        git checkout 4cebbf9e791522be5b6e7cea289ab1c43c66cbc0
        # 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

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/riscv/kernel/process.c:101:6: error: implicit declaration of function 'is_compat_task' [-Werror,-Wimplicit-function-declaration]
           if (is_compat_task())
               ^
>> arch/riscv/kernel/process.c:102:35: error: use of undeclared identifier 'SR_UXL'
                   regs->status = (regs->status & ~SR_UXL) | SR_UXL_32;
                                                   ^
>> arch/riscv/kernel/process.c:102:45: error: use of undeclared identifier 'SR_UXL_32'
                   regs->status = (regs->status & ~SR_UXL) | SR_UXL_32;
                                                             ^
   arch/riscv/kernel/process.c:104:35: error: use of undeclared identifier 'SR_UXL'
                   regs->status = (regs->status & ~SR_UXL) | SR_UXL_64;
                                                   ^
>> arch/riscv/kernel/process.c:104:45: error: use of undeclared identifier 'SR_UXL_64'
                   regs->status = (regs->status & ~SR_UXL) | SR_UXL_64;
                                                             ^
   5 errors generated.


vim +/SR_UXL +102 arch/riscv/kernel/process.c

    85	
    86	void start_thread(struct pt_regs *regs, unsigned long pc,
    87		unsigned long sp)
    88	{
    89		regs->status = SR_PIE;
    90		if (has_fpu()) {
    91			regs->status |= SR_FS_INITIAL;
    92			/*
    93			 * Restore the initial value to the FP register
    94			 * before starting the user program.
    95			 */
    96			fstate_restore(current, regs);
    97		}
    98		regs->epc = pc;
    99		regs->sp = sp;
   100	
   101		if (is_compat_task())
 > 102			regs->status = (regs->status & ~SR_UXL) | SR_UXL_32;
   103		else
 > 104			regs->status = (regs->status & ~SR_UXL) | SR_UXL_64;
   105	}
   106	

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