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mm/slub.c:2077:1: error: unused function 'prepare_slab_obj_exts_hook'

DISCUSSION kernel test robot 2 participants 2 messages Jul 5, 2024 – Jul 11, 2024 Memory management

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#0 lore raw
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/[email protected]/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/[email protected]/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 <[email protected]>
| Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/

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 <[email protected]> :::::: CC: Andrew Morton <[email protected]>

Signature · 2 lines
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
#1 lore raw
Quoted 9 lines · kernel test robot
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/[email protected]/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/[email protected]/reproduce)
Quoted 4 lines

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 <[email protected]>
| Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/

Fix is posted at
https://lore.kernel.org/all/[email protected]/
over slab/for-next baseline because that branch contains another code refactoring [1] which would cause merge conflicts.

[1] https://lore.kernel.org/all/[email protected]/

Quoted 28 lines

All errors (new ones prefixed by >>):

Quoted 1 line
Quoted 1 line

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 <[email protected]> :::::: CC: Andrew Morton <[email protected]>

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