[kkdwivedi:fermata 40/49] kernel/bpf/blk.c:127:17: sparse: sparse: symbol 'bpf_blk_close' was not declared. Should it be static?

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

tree:   https://github.com/kkdwivedi/linux fermata
head:   babde5051be3840becf5a78de91a0b68a99f0e49
commit: be75423b67d512b1abdea0cc7cbef17ffd7e8040 [40/49] bpf: Add block device reads that complete into a coroutine
config: um-randconfig-r2307-20261001 (https://download.01.org/0day-ci/archive/20261002/202610021546.Gfji4DAs-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.4.0-5) 12.4.0
sparse: v0.6.5-rc1
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20261002/202610021546.Gfji4DAs-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/202610021546.Gfji4DAs-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> kernel/bpf/blk.c:127:17: sparse: sparse: symbol 'bpf_blk_close' was not declared. Should it be static?

vim +/bpf_blk_close +127 kernel/bpf/blk.c

   119	
   120	/**
   121	 * bpf_blk_close - close a device opened with bpf_blk_open()
   122	 * @major: device major number
   123	 * @minor: device minor number
   124	 *
   125	 * Reads in flight complete; reads submitted after this fail with -ENODEV.
   126	 */
 > 127	__bpf_kfunc int bpf_blk_close(u32 major, u32 minor)
   128	{
   129		struct bpf_blk_dev *d;
   130	
   131		mutex_lock(&bpf_blk_mutex);
   132		d = xa_erase(&bpf_blk_devs, MKDEV(major, minor));
   133		mutex_unlock(&bpf_blk_mutex);
   134		if (!d)
   135			return -ENODEV;
   136		call_rcu(&d->rcu, bpf_blk_dev_free);
   137		pr_info("bpf_blk: close %u:%u: %lld reads submitted, %lld completed, %lld frames resumed\n",
   138			major, minor, (long long)atomic64_read(&bpf_blk_submitted),
   139			(long long)atomic64_read(&bpf_blk_completed),
   140			(long long)atomic64_read(&bpf_blk_resumed));
   141		return 0;
   142	}
   143	

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