drivers/mailbox/mtk-gpueb-mailbox.c:203:28: sparse: sparse: symbol 'mtk_gpueb_mbox_ops' was not declared. Should it be static?

drivers/mailbox/mtk-gpueb-mailbox.c:203:28: sparse: sparse: symbol 'mtk_gpueb_mbox_ops' was not declared. Should it be static?

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   5472d60c129f75282d94ae5ad072ee6dfb7c7246
commit: dbca0eabb821a6278925712a7bb263d0997e9c8f mailbox: add MediaTek GPUEB IPI mailbox
date:   3 days ago
config: arc-randconfig-r112-20251010 (https://download.01.org/0day-ci/archive/20251010/202510100629.3nGvrhEU-lkp@intel.com/config)
compiler: arc-linux-gcc (GCC) 12.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251010/202510100629.3nGvrhEU-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/202510100629.3nGvrhEU-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> drivers/mailbox/mtk-gpueb-mailbox.c:203:28: sparse: sparse: symbol 'mtk_gpueb_mbox_ops' was not declared. Should it be static?

vim +/mtk_gpueb_mbox_ops +203 drivers/mailbox/mtk-gpueb-mailbox.c

   202	
 > 203	const struct mbox_chan_ops mtk_gpueb_mbox_ops = {
   204		.send_data = mtk_gpueb_mbox_send_data,
   205		.startup = mtk_gpueb_mbox_startup,
   206		.shutdown = mtk_gpueb_mbox_shutdown,
   207		.last_tx_done = mtk_gpueb_mbox_last_tx_done,
   208	};
   209	

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