[chenhuacai-linux-loongson:loongarch-next 15/39] drivers/irqchip/irq-loongson-pch-msi.c:196:5: warning: no previous prototype for 'pch_msi_of_init'

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

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson.git loongarch-next
head:   abd54d3fdafcc8df4aa20ee27ed9abe66cb2fb35
commit: 3e5ea86a131a77df1a8ef729672cd6ece7446bef [15/39] irqchip/loongson-pch-msi: Add ACPI init support
config: sparc-allyesconfig (attached as .config)
compiler: sparc64-linux-gcc (GCC) 9.3.0
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/chenhuacai/linux-loongson.git/commit/?id=3e5ea86a131a77df1a8ef729672cd6ece7446bef
        git remote add chenhuacai-linux-loongson https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson.git
        git fetch --no-tags chenhuacai-linux-loongson loongarch-next
        git checkout 3e5ea86a131a77df1a8ef729672cd6ece7446bef
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=sparc 

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

All warnings (new ones prefixed by >>):

>> drivers/irqchip/irq-loongson-pch-msi.c:196:5: warning: no previous prototype for 'pch_msi_of_init' [-Wmissing-prototypes]
     196 | int pch_msi_of_init(struct device_node *node, struct device_node *parent)
         |     ^~~~~~~~~~~~~~~


vim +/pch_msi_of_init +196 drivers/irqchip/irq-loongson-pch-msi.c

   195	
 > 196	int pch_msi_of_init(struct device_node *node, struct device_node *parent)
   197	{
   198		struct pch_msi_data *priv;
   199		struct irq_domain *parent_domain;
   200		struct resource res;
   201		int ret;
   202	
   203		parent_domain = irq_find_host(parent);
   204		if (!parent_domain) {
   205			pr_err("Failed to find the parent domain\n");
   206			return -ENXIO;
   207		}
   208	
   209		priv = kzalloc(sizeof(*priv), GFP_KERNEL);
   210		if (!priv)
   211			return -ENOMEM;
   212	
   213		mutex_init(&priv->msi_map_lock);
   214	
   215		ret = of_address_to_resource(node, 0, &res);
   216		if (ret) {
   217			pr_err("Failed to allocate resource\n");
   218			goto err_priv;
   219		}
   220	
   221		priv->doorbell = res.start;
   222	
   223		if (of_property_read_u32(node, "loongson,msi-base-vec",
   224					&priv->irq_first)) {
   225			pr_err("Unable to parse MSI vec base\n");
   226			ret = -EINVAL;
   227			goto err_priv;
   228		}
   229	
   230		if (of_property_read_u32(node, "loongson,msi-num-vecs",
   231					&priv->num_irqs)) {
   232			pr_err("Unable to parse MSI vec number\n");
   233			ret = -EINVAL;
   234			goto err_priv;
   235		}
   236	
   237		priv->msi_map = bitmap_zalloc(priv->num_irqs, GFP_KERNEL);
   238		if (!priv->msi_map) {
   239			ret = -ENOMEM;
   240			goto err_priv;
   241		}
   242	
   243		pr_debug("Registering %d MSIs, starting at %d\n",
   244			 priv->num_irqs, priv->irq_first);
   245	
   246		ret = pch_msi_init_domains(priv, node, parent_domain);
   247		if (ret)
   248			goto err_map;
   249	
   250		return 0;
   251	
   252	err_map:
   253		kfree(priv->msi_map);
   254	err_priv:
   255		kfree(priv);
   256		return ret;
   257	}
   258	

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

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