linux-kernel - mm/slub.c:2077:1: error: unused function 'prepare_slab_obj_exts

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Message-ID: <202407050845.zNONqauD-lkp@intel.com>
Date: Fri, 5 Jul 2024 08:35:11 +0800
From: kernel test robot <lkp@...el.com>
To: Suren Baghdasaryan <surenb@...gle.com>
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Memory Management List <linux-mm@...ck.org>
Subject: mm/slub.c:2077:1: error: unused function 'prepare_slab_obj_exts_hook'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   661e504db04c6b7278737ee3a9116738536b4ed4
commit: b4601d096aac8ed26afa88ef8b249975b0530ca1 mm/slab: fix 'variable obj_exts set but not used' warning
date:   10 days ago
config: x86_64-sof-customedconfig-amd-defconfig (https://download.01.org/0day-ci/archive/20240705/202407050845.zNONqauD-lkp@intel.com/config)
compiler: clang version 18.1.5 (https://github.com/llvm/llvm-project 617a15a9eac96088ae5e9134248d8236e34b91b1)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240705/202407050845.zNONqauD-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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202407050845.zNONqauD-lkp@intel.com/

All errors (new ones prefixed by >>):

>> mm/slub.c:2077:1: error: unused function 'prepare_slab_obj_exts_hook' [-Werror,-Wunused-function]
    2077 | prepare_slab_obj_exts_hook(struct kmem_cache *s, gfp_t flags, void *p)
         | ^~~~~~~~~~~~~~~~~~~~~~~~~~
   1 error generated.


vim +/prepare_slab_obj_exts_hook +2077 mm/slub.c

0bedcc66d2a43a Vlastimil Babka    2023-10-03  2075  
4b8736964640fe Suren Baghdasaryan 2024-03-21  2076  static inline struct slabobj_ext *
4b8736964640fe Suren Baghdasaryan 2024-03-21 @2077  prepare_slab_obj_exts_hook(struct kmem_cache *s, gfp_t flags, void *p)
3450a0e5a6fc4c Vlastimil Babka    2023-11-13  2078  {
4b8736964640fe Suren Baghdasaryan 2024-03-21  2079  	return NULL;
4b8736964640fe Suren Baghdasaryan 2024-03-21  2080  }
3450a0e5a6fc4c Vlastimil Babka    2023-11-13  2081  

:::::: The code at line 2077 was first introduced by commit
:::::: 4b8736964640fe160724e7135dc62883bddcdace mm/slab: add allocation accounting into slab allocation and free paths

:::::: TO: Suren Baghdasaryan <surenb@...gle.com>
:::::: CC: Andrew Morton <akpm@...ux-foundation.org>

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki