Re: [PATCH v3 2/7] mm, kasan: SLAB support

[kbuild test robot]

Hi Alexander,

[auto build test WARNING on tip/x86/core]
[also build test WARNING on v4.5-rc5]
[cannot apply to next-20160226]
[if your patch is applied to the wrong git tree, please drop us a note to help improving the system]

url:    https://github.com/0day-ci/linux/commits/Alexander-Potapenko/SLAB-support-for-KASAN/20160226-213301
config: x86_64-randconfig-s0-02262205 (attached as .config)
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All warnings (new ones prefixed by >>):

   In file included from include/linux/printk.h:6:0,
                    from include/linux/kernel.h:13,
                    from mm/kasan/report.c:16:
   mm/kasan/report.c: In function 'print_track':
>> include/linux/kern_levels.h:4:18: warning: format '%lu' expects argument of type 'long unsigned int', but argument 2 has type 'int' [-Wformat=]
    #define KERN_SOH "\001"  /* ASCII Start Of Header */
                     ^
   include/linux/kern_levels.h:10:18: note: in expansion of macro 'KERN_SOH'
    #define KERN_ERR KERN_SOH "3" /* error conditions */
                     ^
   include/linux/printk.h:252:9: note: in expansion of macro 'KERN_ERR'
     printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
            ^
>> mm/kasan/report.c:120:2: note: in expansion of macro 'pr_err'
     pr_err("PID = %lu, CPU = %lu, timestamp = %lu\n", track->pid,
     ^
   include/linux/kern_levels.h:4:18: warning: format '%lu' expects argument of type 'long unsigned int', but argument 3 has type 'int' [-Wformat=]
    #define KERN_SOH "\001"  /* ASCII Start Of Header */
                     ^
   include/linux/kern_levels.h:10:18: note: in expansion of macro 'KERN_SOH'
    #define KERN_ERR KERN_SOH "3" /* error conditions */
                     ^
   include/linux/printk.h:252:9: note: in expansion of macro 'KERN_ERR'
     printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
            ^
>> mm/kasan/report.c:120:2: note: in expansion of macro 'pr_err'
     pr_err("PID = %lu, CPU = %lu, timestamp = %lu\n", track->pid,
     ^
>> include/linux/kern_levels.h:4:18: warning: format '%lu' expects argument of type 'long unsigned int', but argument 4 has type 'long unsigned int:42' [-Wformat=]
    #define KERN_SOH "\001"  /* ASCII Start Of Header */
                     ^
   include/linux/kern_levels.h:10:18: note: in expansion of macro 'KERN_SOH'
    #define KERN_ERR KERN_SOH "3" /* error conditions */
                     ^
   include/linux/printk.h:252:9: note: in expansion of macro 'KERN_ERR'
     printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
            ^
>> mm/kasan/report.c:120:2: note: in expansion of macro 'pr_err'
     pr_err("PID = %lu, CPU = %lu, timestamp = %lu\n", track->pid,
     ^
   mm/kasan/report.c: At top level:
   mm/kasan/report.c:124:13: warning: 'print_object' defined but not used [-Wunused-function]
    static void print_object(struct kmem_cache *cache, void *object)
                ^

vim +/pr_err +120 mm/kasan/report.c

   104		if (addr >= (void *)_stext && addr < (void *)_end)
   105			return true;
   106		if (is_module_address((unsigned long)addr))
   107			return true;
   108		return false;
   109	}
   110	
   111	static inline bool init_task_stack_addr(const void *addr)
   112	{
   113		return addr >= (void *)&init_thread_union.stack &&
   114			(addr <= (void *)&init_thread_union.stack +
   115				sizeof(init_thread_union.stack));
   116	}
   117	
   118	static void print_track(struct kasan_track *track)
   119	{
 > 120		pr_err("PID = %lu, CPU = %lu, timestamp = %lu\n", track->pid,
   121		       track->cpu, track->when);
   122	}
   123	
   124	static void print_object(struct kmem_cache *cache, void *object)
   125	{
   126		struct kasan_alloc_meta *alloc_info = get_alloc_info(cache, object);
   127		struct kasan_free_meta *free_info;
   128	

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