Hi Qais,

[auto build test ERROR on tip/irq/core -- if it's inappropriate base, please suggest rules for selecting the more suitable base]

url:    https://github.com/0day-ci/linux/commits/Qais-Yousef/Implement-generic-IPI-support-mechanism/20151103-192028
config: mips-jz4740 (attached as .config)
reproduce:
        wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=mips 

All errors (new ones prefixed by >>):

   kernel/irq/irqdomain.c: In function 'irq_reserve_ipi':
>> kernel/irq/irqdomain.c:890:9: error: implicit declaration of function '__irq_domain_alloc_irqs' [-Werror=implicit-function-declaration]
     virq = __irq_domain_alloc_irqs(domain, virq, nr_irqs, NUMA_NO_NODE,
            ^
   kernel/irq/irqdomain.c: In function 'irq_destroy_ipi':
>> kernel/irq/irqdomain.c:950:2: error: implicit declaration of function 'irq_domain_free_irqs' [-Werror=implicit-function-declaration]
     irq_domain_free_irqs(irq, nr_irqs);
     ^
   cc1: some warnings being treated as errors

vim +/__irq_domain_alloc_irqs +890 kernel/irq/irqdomain.c

   884		virq = irq_domain_alloc_descs(-1, nr_irqs, 0, NUMA_NO_NODE);
   885		if (virq <= 0) {
   886			pr_warn("Can't reserve IPI, failed to alloc descs\n");
   887			return 0;
   888		}
   889	
 > 890		virq = __irq_domain_alloc_irqs(domain, virq, nr_irqs, NUMA_NO_NODE,
   891						(void *) dest, true);
   892		if (virq <= 0) {
   893			pr_warn("Can't reserve IPI, failed to alloc irqs\n");
   894			goto free_descs;
   895		}
   896	
   897		for (i = virq; i < virq + nr_irqs; i++) {
   898			data = irq_get_irq_data(i);
   899			data->common->ipi_mask = ipi_mask_alloc(dest->nbits);
   900			if (!data->common->ipi_mask)
   901				goto free_ipi_mask;
   902			ipi_mask_copy(data->common->ipi_mask, dest);
   903		}
   904	
   905		return virq;
   906	
   907	free_ipi_mask:
   908		for (i = virq; i < virq + nr_irqs; i++) {
   909			data = irq_get_irq_data(i);
   910			ipi_mask_free(data->common->ipi_mask);
   911		}
   912	free_descs:
   913		irq_free_descs(virq, nr_irqs);
   914		return 0;
   915	}
   916	
   917	/**
   918	 * irq_destroy_ipi() - unreserve an IPI that was previously allocated
   919	 * @irq: linux irq number to be destroyed
   920	 *
   921	 * Return the IPIs allocated with irq_reserve_ipi() to the system destroying all
   922	 * virqs associated with them.
   923	 */
   924	void irq_destroy_ipi(unsigned int irq)
   925	{
   926		struct irq_data *data = irq_get_irq_data(irq);
   927		struct irq_domain *domain;
   928		unsigned int nr_irqs, i;
   929	
   930		if (!irq || !data)
   931			return;
   932	
   933		domain = data->domain;
   934		if (WARN_ON(domain == NULL))
   935			return;
   936	
   937		if (!irq_domain_is_ipi(domain)) {
   938			pr_warn("Not an IPI domain!\n");
   939			return;
   940		}
   941	
   942		nr_irqs = ipi_mask_weight(data->common->ipi_mask);
   943		ipi_mask_free(data->common->ipi_mask);
   944	
   945		for (i = irq + 1; i < irq + nr_irqs; i++) {
   946			data = irq_get_irq_data(i);
   947			ipi_mask_free(data->common->ipi_mask);
   948		}
   949	
 > 950		irq_domain_free_irqs(irq, nr_irqs);
   951	}
   952	
   953	#ifdef	CONFIG_IRQ_DOMAIN_HIERARCHY

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