linux-kernel - [tip:WIP.sched/core 118/144] arch/mips/cavium-octeon/cpu.c:31:3: note: in expansion of macro 'KSTK

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Date:   Sat, 4 Feb 2017 14:30:46 +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 118/144] arch/mips/cavium-octeon/cpu.c:31:3:
 note: in expansion of macro 'KSTK_STATUS'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git WIP.sched/core
head:   f83f0b0647162b099f62e62c203b1cfb90b40239
commit: 297dfd2a653a202557af465e87e0aa5d106a15b1 [118/144] sched/headers: Remove <asm/ptrace.h> from <linux/sched.h>
config: mips-cavium_octeon_defconfig (attached as .config)
compiler: mips64-linux-gnuabi64-gcc (Debian 6.1.1-9) 6.1.1 20160705
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 297dfd2a653a202557af465e87e0aa5d106a15b1
        # save the attached .config to linux build tree
        make.cross ARCH=mips 

All warnings (new ones prefixed by >>):

   In file included from arch/mips/include/asm/thread_info.h:15:0,
                    from include/linux/thread_info.h:25,
                    from include/asm-generic/current.h:4,
                    from ./arch/mips/include/generated/asm/current.h:1,
                    from include/linux/mutex.h:13,
                    from include/linux/notifier.h:13,
                    from arch/mips/cavium-octeon/cpu.c:11:
   arch/mips/cavium-octeon/cpu.c: In function 'cnmips_cu2_call':
   arch/mips/include/asm/processor.h:385:31: error: invalid application of 'sizeof' to incomplete type 'struct pt_regs'
        THREAD_SIZE - 32 - sizeof(struct pt_regs))
                                  ^
   arch/mips/include/asm/processor.h:386:46: note: in expansion of macro '__KSTK_TOS'
    #define task_pt_regs(tsk) ((struct pt_regs *)__KSTK_TOS(tsk))
                                                 ^~~~~~~~~~
   arch/mips/include/asm/processor.h:389:27: note: in expansion of macro 'task_pt_regs'
    #define KSTK_STATUS(tsk) (task_pt_regs(tsk)->cp0_status)
                              ^~~~~~~~~~~~
>> arch/mips/cavium-octeon/cpu.c:31:3: note: in expansion of macro 'KSTK_STATUS'
      KSTK_STATUS(current) |= ST0_CU2;
      ^~~~~~~~~~~

vim +/KSTK_STATUS +31 arch/mips/cavium-octeon/cpu.c

69f3a7de Ralf Baechle 2009-11-24  15  #include <asm/cop2.h>
69f3a7de Ralf Baechle 2009-11-24  16  #include <asm/current.h>
69f3a7de Ralf Baechle 2009-11-24  17  #include <asm/mipsregs.h>
69f3a7de Ralf Baechle 2009-11-24  18  #include <asm/page.h>
69f3a7de Ralf Baechle 2009-11-24  19  #include <asm/octeon/octeon.h>
69f3a7de Ralf Baechle 2009-11-24  20  
69f3a7de Ralf Baechle 2009-11-24  21  static int cnmips_cu2_call(struct notifier_block *nfb, unsigned long action,
69f3a7de Ralf Baechle 2009-11-24  22  	void *data)
69f3a7de Ralf Baechle 2009-11-24  23  {
69f3a7de Ralf Baechle 2009-11-24  24  	unsigned long flags;
69f3a7de Ralf Baechle 2009-11-24  25  	unsigned int status;
69f3a7de Ralf Baechle 2009-11-24  26  
69f3a7de Ralf Baechle 2009-11-24  27  	switch (action) {
69f3a7de Ralf Baechle 2009-11-24  28  	case CU2_EXCEPTION:
69f3a7de Ralf Baechle 2009-11-24  29  		prefetch(&current->thread.cp2);
69f3a7de Ralf Baechle 2009-11-24  30  		local_irq_save(flags);
69f3a7de Ralf Baechle 2009-11-24 @31  		KSTK_STATUS(current) |= ST0_CU2;
69f3a7de Ralf Baechle 2009-11-24  32  		status = read_c0_status();
69f3a7de Ralf Baechle 2009-11-24  33  		write_c0_status(status | ST0_CU2);
69f3a7de Ralf Baechle 2009-11-24  34  		octeon_cop2_restore(&(current->thread.cp2));
69f3a7de Ralf Baechle 2009-11-24  35  		write_c0_status(status & ~ST0_CU2);
69f3a7de Ralf Baechle 2009-11-24  36  		local_irq_restore(flags);
69f3a7de Ralf Baechle 2009-11-24  37  
69f3a7de Ralf Baechle 2009-11-24  38  		return NOTIFY_BAD;	/* Don't call default notifier */
69f3a7de Ralf Baechle 2009-11-24  39  	}

:::::: The code at line 31 was first introduced by commit
:::::: 69f3a7de1f1ec935924b1b13f83812f8b30e92ce MIPS: Modularize COP2 handling

:::::: TO: Ralf Baechle <ralf@...ux-mips.org>
:::::: CC: Ralf Baechle <ralf@...ux-mips.org>

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