Hi Changcheng,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on linus/master]
[also build test WARNING on v4.14-rc8]
[cannot apply to next-20171108]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Liu-Changcheng/format-idle-IP-output-func-offset-length/20171109-100035
config: i386-randconfig-n0-11080844 (attached as .config)
compiler: gcc-4.8 (Debian 4.8.4-1) 4.8.4
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

All warnings (new ones prefixed by >>):

   lib/nmi_backtrace.c: In function 'nmi_cpu_backtrace':
>> lib/nmi_backtrace.c:96:4: warning: format '%p' expects argument of type 'void *', but argument 3 has type 'long unsigned int' [-Wformat=]
       pr_warn("NMI backtrace for cpu %d skipped: idling at pc %pS\n",
       ^

vim +96 lib/nmi_backtrace.c

    87	
    88	bool nmi_cpu_backtrace(struct pt_regs *regs)
    89	{
    90		static arch_spinlock_t lock = __ARCH_SPIN_LOCK_UNLOCKED;
    91		int cpu = smp_processor_id();
    92	
    93		if (cpumask_test_cpu(cpu, to_cpumask(backtrace_mask))) {
    94			arch_spin_lock(&lock);
    95			if (regs && cpu_in_idle(instruction_pointer(regs))) {
  > 96				pr_warn("NMI backtrace for cpu %d skipped: idling at pc %pS\n",

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