tree:   https://github.com/ammarfaizi2/linux-block tglx/devel/devmsi
head:   ba77f809fa66b636222f6677ec7cf8faa1562fe7
commit: 628d73d887267dafa93dc4162fc3bcf1c9e12107 [68/86] x86/apic/vector: Provide MSI parent domain
config: x86_64-allyesconfig
compiler: gcc-11 (Debian 11.3.0-8) 11.3.0
reproduce (this is a W=1 build):
        # https://github.com/ammarfaizi2/linux-block/commit/628d73d887267dafa93dc4162fc3bcf1c9e12107
        git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block
        git fetch --no-tags ammarfaizi2-block tglx/devel/devmsi
        git checkout 628d73d887267dafa93dc4162fc3bcf1c9e12107
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash arch/x86/kernel/apic/

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

All warnings (new ones prefixed by >>):

>> arch/x86/kernel/apic/msi.c:207: warning: expecting prototype for x86_vector_init_dev_msi_info(). Prototype was for x86_init_dev_msi_info() instead


vim +207 arch/x86/kernel/apic/msi.c

   193	
   194	/**
   195	 * x86_vector_init_dev_msi_info - Domain info setup for MSI domains
   196	 * @domain:		The (root) domain providing this callback
   197	 * @real_parent:	The real parent domain of the to initialize domain
   198	 * @info:		The domain info for the to initialize domain
   199	 *
   200	 * This function is to be used for all types of MSI domains above the x86
   201	 * vector domain and any intermediates. The domain specific functionality
   202	 * is determined via the @real_parent.
   203	 */
   204	static bool x86_init_dev_msi_info(struct irq_domain *domain,
   205					  struct irq_domain *real_parent,
   206					  struct msi_domain_info *info)
 > 207	{
   208		const struct msi_parent_ops *pops = real_parent->msi_parent_ops;
   209	
   210		/* MSI parent domain specific settings */
   211		switch (real_parent->bus_token) {
   212		case DOMAIN_BUS_ANY:
   213			/* Only the vector domain can have the ANY token */
   214			if (WARN_ON_ONCE(domain != real_parent))
   215				return false;
   216			info->chip->irq_set_affinity = msi_set_affinity;
   217			break;
   218		default:
   219			WARN_ON_ONCE(1);
   220			return false;
   221		}
   222	
   223		/* Is the target supported? */
   224		switch(info->bus_token) {
   225		case DOMAIN_BUS_PCI_DEVICE_MSI:
   226		case DOMAIN_BUS_PCI_DEVICE_MSIX:
   227			break;
   228		default:
   229			WARN_ON_ONCE(1);
   230			return false;
   231		}
   232	
   233		/*
   234		 * Mask out the domain specific MSI feature flags which are not
   235		 * supported by the real parent.
   236		 */
   237		info->flags			&= pops->supported_flags;
   238		/* Enforce the required flags */
   239		info->flags			|= X86_VECTOR_MSI_FLAGS_REQUIRED;
   240	
   241		/* This is always invoked from the top level MSI domain! */
   242		info->ops->msi_prepare		= x86_msi_prepare;
   243	
   244		info->chip->irq_ack		= irq_chip_ack_parent;
   245		info->chip->irq_retrigger	= irq_chip_retrigger_hierarchy;
   246		info->chip->flags		|= IRQCHIP_SKIP_SET_WAKE |
   247						   IRQCHIP_AFFINITY_PRE_STARTUP;
   248	
   249		info->handler			= handle_edge_irq;
   250		info->handler_name		= "edge";
   251	
   252		return true;
   253	}
   254	

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