[openeuler:openEuler-1.0-LTS 1941/1941] mm/kmemleak.c:434:4: error: implicit declaration of function 'printk_safe_exit'; did you mean 'printk_nmi_exit'?

[kernel test robot <lkp@intel.com>]

Hi Gu,

FYI, the error/warning still remains.

tree:   https://gitee.com/openeuler/kernel.git openEuler-1.0-LTS
head:   df8d11fbcbb07177c2500e63d7f5a36063977596
commit: 38f093f2876aaa0dd46e11d638e8d2a263f38199 [1941/1941] mm: Fix possible deadlock in console_trylock_spinning
config: arm64-randconfig-002-20251212 (https://download.01.org/0day-ci/archive/20251213/202512130502.2LxTdCek-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 7.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251213/202512130502.2LxTdCek-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202512130502.2LxTdCek-lkp@intel.com/

All errors (new ones prefixed by >>):

   mm/kmemleak.c: In function 'lookup_object':
   mm/kmemleak.c:430:4: error: implicit declaration of function 'printk_safe_enter'; did you mean 'printk_nmi_enter'? [-Werror=implicit-function-declaration]
       printk_safe_enter();
       ^~~~~~~~~~~~~~~~~
       printk_nmi_enter
>> mm/kmemleak.c:434:4: error: implicit declaration of function 'printk_safe_exit'; did you mean 'printk_nmi_exit'? [-Werror=implicit-function-declaration]
       printk_safe_exit();
       ^~~~~~~~~~~~~~~~
       printk_nmi_exit
   cc1: some warnings being treated as errors


vim +434 mm/kmemleak.c

   405	
   406	/*
   407	 * Look-up a memory block metadata (kmemleak_object) in the object search
   408	 * tree based on a pointer value. If alias is 0, only values pointing to the
   409	 * beginning of the memory block are allowed. The kmemleak_lock must be held
   410	 * when calling this function.
   411	 */
   412	static struct kmemleak_object *lookup_object(unsigned long ptr, int alias)
   413	{
   414		struct rb_node *rb = object_tree_root.rb_node;
   415	
   416		while (rb) {
   417			struct kmemleak_object *object =
   418				rb_entry(rb, struct kmemleak_object, rb_node);
   419			if (ptr < object->pointer)
   420				rb = object->rb_node.rb_left;
   421			else if (object->pointer + object->size <= ptr)
   422				rb = object->rb_node.rb_right;
   423			else if (object->pointer == ptr || alias)
   424				return object;
   425			else {
   426				/*
   427				 * Printk deferring due to the kmemleak_lock held.
   428				 * This is done to avoid deadlock.
   429				 */
   430				printk_safe_enter();
   431				kmemleak_warn("Found object by alias at 0x%08lx\n",
   432					      ptr);
   433				dump_object_info(object);
 > 434				printk_safe_exit();
   435	
   436				break;
   437			}
   438		}
   439		return NULL;
   440	}
   441	

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