linux-kernel - Re: [PATCH] microblaze: remove unneeded variable 'err'

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Date:   Wed, 10 Mar 2021 21:00:50 +0800
From:   kernel test robot <lkp@...el.com>
To:     Yang Li <yang.lee@...ux.alibaba.com>, monstr@...str.eu
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Yang Li <yang.lee@...ux.alibaba.com>
Subject: Re: [PATCH] microblaze: remove unneeded variable 'err'

Hi Yang,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on linux/master]
[also build test ERROR on linus/master v5.12-rc2 next-20210310]
[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]

url:    https://github.com/0day-ci/linux/commits/Yang-Li/microblaze-remove-unneeded-variable-err/20210310-165230
base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 144c79ef33536b4ecb4951e07dbc1f2b7fa99d32
config: microblaze-randconfig-r006-20210309 (attached as .config)
compiler: microblaze-linux-gcc (GCC) 9.3.0
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://github.com/0day-ci/linux/commit/3e5cd1e0be818f4bfaafd1c6fed6775d27816f40
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Yang-Li/microblaze-remove-unneeded-variable-err/20210310-165230
        git checkout 3e5cd1e0be818f4bfaafd1c6fed6775d27816f40
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=microblaze 

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/microblaze/kernel/signal.c: In function 'restore_sigcontext':
>> arch/microblaze/kernel/signal.c:60:19: error: 'err' undeclared (first use in this function)
      60 | #define COPY(x)  {err |= __get_user(regs->x, &sc->regs.x); }
         |                   ^~~
   arch/microblaze/kernel/signal.c:61:2: note: in expansion of macro 'COPY'
      61 |  COPY(r0);
         |  ^~~~
   arch/microblaze/kernel/signal.c:60:19: note: each undeclared identifier is reported only once for each function it appears in
      60 | #define COPY(x)  {err |= __get_user(regs->x, &sc->regs.x); }
         |                   ^~~
   arch/microblaze/kernel/signal.c:61:2: note: in expansion of macro 'COPY'
      61 |  COPY(r0);
         |  ^~~~


vim +/err +60 arch/microblaze/kernel/signal.c

2148daa9c45ff4 Michal Simek  2009-03-27  56  
353b431bafc42e Arnd Bergmann 2009-05-01  57  static int restore_sigcontext(struct pt_regs *regs,
353b431bafc42e Arnd Bergmann 2009-05-01  58  				struct sigcontext __user *sc, int *rval_p)
2148daa9c45ff4 Michal Simek  2009-03-27  59  {
2148daa9c45ff4 Michal Simek  2009-03-27 @60  #define COPY(x)		{err |= __get_user(regs->x, &sc->regs.x); }
2148daa9c45ff4 Michal Simek  2009-03-27  61  	COPY(r0);
2148daa9c45ff4 Michal Simek  2009-03-27  62  	COPY(r1);
2148daa9c45ff4 Michal Simek  2009-03-27  63  	COPY(r2);	COPY(r3);	COPY(r4);	COPY(r5);
2148daa9c45ff4 Michal Simek  2009-03-27  64  	COPY(r6);	COPY(r7);	COPY(r8);	COPY(r9);
2148daa9c45ff4 Michal Simek  2009-03-27  65  	COPY(r10);	COPY(r11);	COPY(r12);	COPY(r13);
2148daa9c45ff4 Michal Simek  2009-03-27  66  	COPY(r14);	COPY(r15);	COPY(r16);	COPY(r17);
2148daa9c45ff4 Michal Simek  2009-03-27  67  	COPY(r18);	COPY(r19);	COPY(r20);	COPY(r21);
2148daa9c45ff4 Michal Simek  2009-03-27  68  	COPY(r22);	COPY(r23);	COPY(r24);	COPY(r25);
2148daa9c45ff4 Michal Simek  2009-03-27  69  	COPY(r26);	COPY(r27);	COPY(r28);	COPY(r29);
2148daa9c45ff4 Michal Simek  2009-03-27  70  	COPY(r30);	COPY(r31);
2148daa9c45ff4 Michal Simek  2009-03-27  71  	COPY(pc);	COPY(ear);	COPY(esr);	COPY(fsr);
2148daa9c45ff4 Michal Simek  2009-03-27  72  #undef COPY
2148daa9c45ff4 Michal Simek  2009-03-27  73  
2148daa9c45ff4 Michal Simek  2009-03-27  74  	*rval_p = regs->r3;
2148daa9c45ff4 Michal Simek  2009-03-27  75  
3e5cd1e0be818f Yang Li       2021-03-10  76  	return 0;
2148daa9c45ff4 Michal Simek  2009-03-27  77  }
2148daa9c45ff4 Michal Simek  2009-03-27  78  

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

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