linux-kernel - [tip:WIP.sched/core 144/144] arch/blackfin/kernel/flat.c:49:27: error: dereferencing pointer to incomplete type 'struct mm

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Message-ID: <201702040841.liDTYWac%fengguang.wu@intel.com>
Date:   Sat, 4 Feb 2017 08:37:46 +0800
From:   kbuild test robot <fengguang.wu@...el.com>
To:     Ingo Molnar <mingo@...nel.org>
Cc:     kbuild-all@...org, linux-kernel@...r.kernel.org, tipbuild@...or.com
Subject: [tip:WIP.sched/core 144/144] arch/blackfin/kernel/flat.c:49:27:
 error: dereferencing pointer to incomplete type 'struct mm_struct'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git WIP.sched/core
head:   2bf1cc270cf3d7b47dccac40b650df0a1b3c14f9
commit: 2bf1cc270cf3d7b47dccac40b650df0a1b3c14f9 [144/144] sched/headers: Remove the <linux/mm_types.h> dependency from <linux/sched.h>
config: blackfin-allyesconfig (attached as .config)
compiler: bfin-uclinux-gcc (GCC) 6.2.0
reproduce:
        wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout 2bf1cc270cf3d7b47dccac40b650df0a1b3c14f9
        # save the attached .config to linux build tree
        make.cross ARCH=blackfin 

All errors (new ones prefixed by >>):

   arch/blackfin/kernel/flat.c: In function 'bfin_get_addr_from_rp':
>> arch/blackfin/kernel/flat.c:49:27: error: dereferencing pointer to incomplete type 'struct mm_struct'
      return val + current->mm->context.end_brk;
                              ^~

vim +49 arch/blackfin/kernel/flat.c

1394f032 Bryan Wu       2007-05-06  33  	case FLAT_BFIN_RELOC_TYPE_32_BIT:
1394f032 Bryan Wu       2007-05-06  34  		pr_debug("*ptr = %lx", get_unaligned(ptr));
1394f032 Bryan Wu       2007-05-06  35  		val = get_unaligned(ptr);
1394f032 Bryan Wu       2007-05-06  36  		break;
1394f032 Bryan Wu       2007-05-06  37  
1394f032 Bryan Wu       2007-05-06  38  	default:
1f83b8f1 Mike Frysinger 2007-07-12  39  		pr_debug("BINFMT_FLAT: Unknown relocation type %x\n", type);
1394f032 Bryan Wu       2007-05-06  40  		return 0;
1394f032 Bryan Wu       2007-05-06  41  	}
1394f032 Bryan Wu       2007-05-06  42  
1394f032 Bryan Wu       2007-05-06  43  	/*
1394f032 Bryan Wu       2007-05-06  44  	 * Stack-relative relocs contain the offset into the stack, we
1394f032 Bryan Wu       2007-05-06  45  	 * have to add the stack's start address here and return 1 from
1394f032 Bryan Wu       2007-05-06  46  	 * flat_addr_absolute to prevent the normal address calculations
1394f032 Bryan Wu       2007-05-06  47  	 */
1394f032 Bryan Wu       2007-05-06  48  	if (relval & (1 << 29))
1394f032 Bryan Wu       2007-05-06 @49  		return val + current->mm->context.end_brk;
1394f032 Bryan Wu       2007-05-06  50  
1394f032 Bryan Wu       2007-05-06  51  	if ((flags & FLAT_FLAG_GOTPIC) == 0)
1394f032 Bryan Wu       2007-05-06  52  		val = htonl(val);
1394f032 Bryan Wu       2007-05-06  53  	return val;
1394f032 Bryan Wu       2007-05-06  54  }
1394f032 Bryan Wu       2007-05-06  55  EXPORT_SYMBOL(bfin_get_addr_from_rp);
1394f032 Bryan Wu       2007-05-06  56  
1394f032 Bryan Wu       2007-05-06  57  /*

:::::: The code at line 49 was first introduced by commit
:::::: 1394f03221790a988afc3e4b3cb79f2e477246a9 blackfin architecture

:::::: TO: Bryan Wu <bryan.wu@...log.com>
:::::: CC: Linus Torvalds <torvalds@...dy.linux-foundation.org>

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