[vincent-guittot:scmi/ffa-transport 1/2] drivers/firmware/arm_scmi/ffa.c:337:6: warning: no previous prototype for function 'ffa_shm_free_kernel_buf'

[vincent-guittot:scmi/ffa-transport 1/2] drivers/firmware/arm_scmi/ffa.c:337:6: warning: no previous prototype for function 'ffa_shm_free_kernel_buf'

[kernel test robot]

tree:   https://git.linaro.org/people/vincent.guittot/kernel.git scmi/ffa-transport
head:   58f815a694fe99b6067c8e74a23f7ef193a7f76e
commit: 4e6e5543e62399d3e18c26257137593114fb63cc [1/2] scmi/ffa: add a new scmi transport layer based on ffa
config: arm64-allyesconfig (https://download.01.org/0day-ci/archive/20231201/202312010122.73mxP5BP-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project.git 4a5ac14ee968ff0ad5d2cc1ffa0299048db4c88a)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231201/202312010122.73mxP5BP-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/202312010122.73mxP5BP-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/firmware/arm_scmi/ffa.c:337:6: warning: no previous prototype for function 'ffa_shm_free_kernel_buf' [-Wmissing-prototypes]
     337 | void ffa_shm_free_kernel_buf(struct tee_shm *shm)
         |      ^
   drivers/firmware/arm_scmi/ffa.c:337:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
     337 | void ffa_shm_free_kernel_buf(struct tee_shm *shm)
         | ^
         | static 
   1 warning generated.


vim +/ffa_shm_free_kernel_buf +337 drivers/firmware/arm_scmi/ffa.c

   336	
 > 337	void ffa_shm_free_kernel_buf(struct tee_shm *shm)
   338	{
   339		struct ffa_device *ffa_dev = ffa_service->ffa_dev;
   340		const struct ffa_mem_ops *mem_ops = ffa_dev->ops->mem_ops;
   341		int ret;
   342	
   343		/* Nothing to free */
   344		if (shm == NULL)
   345			return;
   346	
   347		// reclaim shared memory
   348		ret = mem_ops->memory_reclaim(shm->sec_world_id, 0);
   349		if (ret)
   350			pr_err("mem_reclaim: 0x%llx %d", shm->sec_world_id, ret);
   351	
   352		free_pages((unsigned long)shm->kaddr, get_order(shm->size));
   353		kfree(shm);
   354	}
   355	

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https://github.com/intel/lkp-tests/wiki