Hi Shakeel,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on mmotm/master]
[also build test ERROR on next-20180220]
[cannot apply to linus/master v4.16-rc2]
[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/Shakeel-Butt/Directed-kmem-charging/20180221-071026
base:   git://git.cmpxchg.org/linux-mmotm.git master
config: i386-randconfig-n0-201807 (attached as .config)
compiler: gcc-7 (Debian 7.3.0-1) 7.3.0
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

All errors (new ones prefixed by >>):

   init/initramfs.o: In function `kmalloc_memcg':
   include/linux/slab.h:588: undefined reference to `__kmalloc_memcg'
   include/linux/slab.h:588: undefined reference to `__kmalloc_memcg'
   arch/x86/events/core.o: In function `kmalloc_memcg':
   include/linux/slab.h:588: undefined reference to `__kmalloc_memcg'
   include/linux/slab.h:588: undefined reference to `__kmalloc_memcg'
   arch/x86/kernel/ksysfs.o: In function `kmalloc_memcg':
   include/linux/slab.h:588: undefined reference to `__kmalloc_memcg'
   arch/x86/kernel/e820.o:include/linux/slab.h:588: more undefined references to `__kmalloc_memcg' follow
   fs/notify/fanotify/fanotify.o: In function `fanotify_alloc_event':
>> fs/notify/fanotify/fanotify.c:159: undefined reference to `kmem_cache_alloc_memcg'
   fs/eventpoll.o: In function `kmalloc_memcg':
   include/linux/slab.h:588: undefined reference to `__kmalloc_memcg'
   fs/signalfd.o: In function `kmalloc_memcg':
   include/linux/slab.h:588: undefined reference to `__kmalloc_memcg'
   fs/timerfd.o: In function `kmalloc_memcg':
   include/linux/slab.h:588: undefined reference to `__kmalloc_memcg'
   include/linux/slab.h:588: undefined reference to `__kmalloc_memcg'
   fs/eventfd.o: In function `kmalloc_memcg':
   include/linux/slab.h:588: undefined reference to `__kmalloc_memcg'
   fs/userfaultfd.o:include/linux/slab.h:588: more undefined references to `__kmalloc_memcg' follow

vim +159 fs/notify/fanotify/fanotify.c

   141	
   142	struct fanotify_event_info *fanotify_alloc_event(struct inode *inode, u32 mask,
   143							 const struct path *path,
   144							 struct mem_cgroup *memcg)
   145	{
   146		struct fanotify_event_info *event;
   147	
   148		if (fanotify_is_perm_event(mask)) {
   149			struct fanotify_perm_event_info *pevent;
   150	
   151			pevent = kmem_cache_alloc_memcg(fanotify_perm_event_cachep,
   152							GFP_KERNEL, memcg);
   153			if (!pevent)
   154				return NULL;
   155			event = &pevent->fae;
   156			pevent->response = 0;
   157			goto init;
   158		}
 > 159		event = kmem_cache_alloc_memcg(fanotify_event_cachep, GFP_KERNEL,
   160					       memcg);
   161		if (!event)
   162			return NULL;
   163	init: __maybe_unused
   164		fsnotify_init_event(&event->fse, inode, mask);
   165		event->tgid = get_pid(task_tgid(current));
   166		if (path) {
   167			event->path = *path;
   168			path_get(&event->path);
   169		} else {
   170			event->path.mnt = NULL;
   171			event->path.dentry = NULL;
   172		}
   173		return event;
   174	}
   175	

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation