linux-kernel - [tip:WIP.sched/core 138/170] arch/mips/loongson64/loongson-3/smp.c:393:32: note: in expansion of macro '__KSTK

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Message-ID: <201702070829.SlbuVs08%fengguang.wu@intel.com>
Date:   Tue, 7 Feb 2017 08:35:31 +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 138/170]
 arch/mips/loongson64/loongson-3/smp.c:393:32: note: in expansion of macro
 '__KSTK_TOS'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git WIP.sched/core
head:   8b88220c2b48c511c3dc8210d92a1d99d180dd69
commit: b8dca9f8769ff647742c30f21f5fab0b6a591578 [138/170] sched/headers: Split <linux/sched/task_stack.h> out of <linux/sched.h>
config: mips-loongson3_defconfig (attached as .config)
compiler: mips64el-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 b8dca9f8769ff647742c30f21f5fab0b6a591578
        # 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/kernfs.h:13,
                    from include/linux/sysfs.h:15,
                    from include/linux/kobject.h:21,
                    from include/linux/device.h:17,
                    from include/linux/node.h:17,
                    from include/linux/cpu.h:16,
                    from arch/mips/loongson64/loongson-3/smp.c:18:
   arch/mips/loongson64/loongson-3/smp.c: In function 'loongson3_boot_secondary':
   arch/mips/include/asm/processor.h:384:41: error: implicit declaration of function 'task_stack_page' [-Werror=implicit-function-declaration]
    #define __KSTK_TOS(tsk) ((unsigned long)task_stack_page(tsk) + \
                                            ^
>> arch/mips/loongson64/loongson-3/smp.c:393:32: note: in expansion of macro '__KSTK_TOS'
     startargs[1] = (unsigned long)__KSTK_TOS(idle);
                                   ^~~~~~~~~~
   cc1: some warnings being treated as errors

vim +/__KSTK_TOS +393 arch/mips/loongson64/loongson-3/smp.c

300459d5 arch/mips/loongson/loongson-3/smp.c Huacai Chen 2014-03-21  377  {
c4a987db arch/mips/loongson/loongson-3/smp.c Huacai Chen 2014-03-21  378  	init_cpu_present(cpu_possible_mask);
c4a987db arch/mips/loongson/loongson-3/smp.c Huacai Chen 2014-03-21  379  	per_cpu(cpu_state, smp_processor_id()) = CPU_ONLINE;
300459d5 arch/mips/loongson/loongson-3/smp.c Huacai Chen 2014-03-21  380  }
300459d5 arch/mips/loongson/loongson-3/smp.c Huacai Chen 2014-03-21  381  
300459d5 arch/mips/loongson/loongson-3/smp.c Huacai Chen 2014-03-21  382  /*
300459d5 arch/mips/loongson/loongson-3/smp.c Huacai Chen 2014-03-21  383   * Setup the PC, SP, and GP of a secondary processor and start it runing!
300459d5 arch/mips/loongson/loongson-3/smp.c Huacai Chen 2014-03-21  384   */
300459d5 arch/mips/loongson/loongson-3/smp.c Huacai Chen 2014-03-21  385  static void loongson3_boot_secondary(int cpu, struct task_struct *idle)
300459d5 arch/mips/loongson/loongson-3/smp.c Huacai Chen 2014-03-21  386  {
300459d5 arch/mips/loongson/loongson-3/smp.c Huacai Chen 2014-03-21  387  	unsigned long startargs[4];
300459d5 arch/mips/loongson/loongson-3/smp.c Huacai Chen 2014-03-21  388  
300459d5 arch/mips/loongson/loongson-3/smp.c Huacai Chen 2014-03-21  389  	pr_info("Booting CPU#%d...\n", cpu);
300459d5 arch/mips/loongson/loongson-3/smp.c Huacai Chen 2014-03-21  390  
300459d5 arch/mips/loongson/loongson-3/smp.c Huacai Chen 2014-03-21  391  	/* startargs[] are initial PC, SP and GP for secondary CPU */
300459d5 arch/mips/loongson/loongson-3/smp.c Huacai Chen 2014-03-21  392  	startargs[0] = (unsigned long)&smp_bootstrap;
300459d5 arch/mips/loongson/loongson-3/smp.c Huacai Chen 2014-03-21 @393  	startargs[1] = (unsigned long)__KSTK_TOS(idle);
300459d5 arch/mips/loongson/loongson-3/smp.c Huacai Chen 2014-03-21  394  	startargs[2] = (unsigned long)task_thread_info(idle);
300459d5 arch/mips/loongson/loongson-3/smp.c Huacai Chen 2014-03-21  395  	startargs[3] = 0;
300459d5 arch/mips/loongson/loongson-3/smp.c Huacai Chen 2014-03-21  396  
300459d5 arch/mips/loongson/loongson-3/smp.c Huacai Chen 2014-03-21  397  	pr_debug("CPU#%d, func_pc=%lx, sp=%lx, gp=%lx\n",
300459d5 arch/mips/loongson/loongson-3/smp.c Huacai Chen 2014-03-21  398  			cpu, startargs[0], startargs[1], startargs[2]);
300459d5 arch/mips/loongson/loongson-3/smp.c Huacai Chen 2014-03-21  399  
ec0f8d3f arch/mips/loongson/loongson-3/smp.c Huacai Chen 2014-11-04  400  	loongson3_ipi_write64(startargs[3],
ec0f8d3f arch/mips/loongson/loongson-3/smp.c Huacai Chen 2014-11-04  401  			(void *)(ipi_mailbox_buf[cpu_logical_map(cpu)]+0x18));

:::::: The code at line 393 was first introduced by commit
:::::: 300459d558725cdada5ddebbe52c24ef6e1853d3 MIPS: Loongson 3: Add Loongson-3 SMP support

:::::: TO: Huacai Chen <chenhc@...ote.com>
:::::: CC: Ralf Baechle <ralf@...ux-mips.org>

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