linux-kernel - [tj-misc:bpf-task-local-storage-prealloc 3/3] kernel/bpf/bpf_task_storage.c:371:34: error: 'task_storage_map_ops' undeclared; did you mean 'task_storage_map

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Date:   Sun, 24 Oct 2021 19:40:52 +0800
From:   kernel test robot <lkp@...el.com>
To:     Tejun Heo <tj@...nel.org>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: [tj-misc:bpf-task-local-storage-prealloc 3/3]
 kernel/bpf/bpf_task_storage.c:371:34: error: 'task_storage_map_ops'
 undeclared; did you mean 'task_storage_map_alloc'?

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/tj/misc.git bpf-task-local-storage-prealloc
head:   5e3ad0d4a0b0732e7ebe035582d282ab752397ed
commit: 5e3ad0d4a0b0732e7ebe035582d282ab752397ed [3/3] bpf: Implement prealloc for task_local_storage
config: openrisc-randconfig-r005-20211019 (attached as .config)
compiler: or1k-linux-gcc (GCC) 11.2.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://git.kernel.org/pub/scm/linux/kernel/git/tj/misc.git/commit/?id=5e3ad0d4a0b0732e7ebe035582d282ab752397ed
        git remote add tj-misc https://git.kernel.org/pub/scm/linux/kernel/git/tj/misc.git
        git fetch --no-tags tj-misc bpf-task-local-storage-prealloc
        git checkout 5e3ad0d4a0b0732e7ebe035582d282ab752397ed
        # save the attached .config to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=openrisc SHELL=/bin/bash kernel/bpf/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>

All errors (new ones prefixed by >>):

   kernel/bpf/bpf_task_storage.c: In function 'task_storage_map_alloc':
>> kernel/bpf/bpf_task_storage.c:371:34: error: 'task_storage_map_ops' undeclared (first use in this function); did you mean 'task_storage_map_alloc'?
     371 |                 smap->map.ops = &task_storage_map_ops;
         |                                  ^~~~~~~~~~~~~~~~~~~~
         |                                  task_storage_map_alloc
   kernel/bpf/bpf_task_storage.c:371:34: note: each undeclared identifier is reported only once for each function it appears in


vim +371 kernel/bpf/bpf_task_storage.c

   355	
   356	static struct bpf_map *task_storage_map_alloc(union bpf_attr *attr)
   357	{
   358		struct bpf_local_storage_map *smap;
   359		int err;
   360	
   361		smap = bpf_local_storage_map_alloc(attr);
   362		if (IS_ERR(smap))
   363			return ERR_CAST(smap);
   364	
   365		if (!(attr->map_flags & BPF_F_NO_PREALLOC)) {
   366			/* We're going to exercise the regular update path to populate
   367			 * the map for the existing tasks, which will call into map ops
   368			 * which is normally initialized after this function returns.
   369			 * Initialize it early here.
   370			 */
 > 371			smap->map.ops = &task_storage_map_ops;
   372	
   373			percpu_down_write(&threadgroup_rwsem);
   374			list_add_tail(&smap->prealloc_node, &prealloc_smaps);
   375			err = task_storage_map_populate(smap);
   376			percpu_up_write(&threadgroup_rwsem);
   377			if (err) {
   378				bpf_local_storage_map_free(smap,
   379							   &bpf_task_storage_busy);
   380				return ERR_PTR(err);
   381			}
   382		}
   383	
   384		smap->cache_idx = bpf_local_storage_cache_idx_get(&task_cache);
   385		return &smap->map;
   386	}
   387	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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