linux-kernel - Re: [RFC v2 PATCH 07/14] irq: add a new generic IPI reservation code to irq core

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Date:	Tue, 13 Oct 2015 18:56:35 +0800
From:	kbuild test robot <lkp@...el.com>
To:	Qais Yousef <qais.yousef@...tec.com>
Cc:	kbuild-all@...org, linux-kernel@...r.kernel.org,
	tglx@...utronix.de, jason@...edaemon.net, marc.zyngier@....com,
	jiang.liu@...ux.intel.com, ralf@...ux-mips.org,
	linux-mips@...ux-mips.org, Qais Yousef <qais.yousef@...tec.com>
Subject: Re: [RFC v2 PATCH 07/14] irq: add a new generic IPI reservation code
 to irq core

Hi Qais,

[auto build test ERROR on v4.3-rc5 -- 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/20151013-182314
config: sh-titan_defconfig (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=sh 

All errors (new ones prefixed by >>):

   kernel/irq/irqdomain.c: In function 'irq_reserve_ipi':
>> kernel/irq/irqdomain.c:791:2: error: implicit declaration of function '__irq_domain_alloc_irqs' [-Werror=implicit-function-declaration]
   kernel/irq/irqdomain.c:799:18: error: 'struct irq_data' has no member named 'ipi_mask'
   kernel/irq/irqdomain.c:800:6: error: 'struct irq_data' has no member named 'ipi_mask'
   kernel/irq/irqdomain.c: In function 'irq_destroy_ipi':
>> kernel/irq/irqdomain.c:832:2: error: implicit declaration of function 'irq_domain_free_irqs' [-Werror=implicit-function-declaration]
   kernel/irq/irqdomain.c:833:21: error: 'struct irq_data' has no member named 'ipi_mask'
   kernel/irq/irqdomain.c:833:45: error: 'struct irq_data' has no member named 'ipi_mask'
   cc1: some warnings being treated as errors

vim +/__irq_domain_alloc_irqs +791 kernel/irq/irqdomain.c

   785		if (virq <= 0) {
   786			pr_warn("Can't reserve IPI, failed to alloc descs\n");
   787			return 0;
   788		}
   789	
   790		/* we are reusing hierarchy alloc function, should we create another one? */
 > 791		virq = __irq_domain_alloc_irqs(domain, virq, nr_irqs, NUMA_NO_NODE,
   792						(void *) dest, true);
   793		if (virq <= 0) {
   794			pr_warn("Can't reserve IPI, failed to alloc irqs\n");
   795			goto free_descs;
   796		}
   797	
   798		data = irq_get_irq_data(virq);
   799		bitmap_copy(data->ipi_mask.cpumask, dest->cpumask, dest->nbits);
   800		data->ipi_mask.nbits = dest->nbits;
   801	
   802		return virq;
   803	
   804	free_descs:
   805		irq_free_descs(virq, nr_irqs);
   806		return 0;
   807	}
   808	
   809	/**
   810	 * irq_destroy_ipi() - unreserve an IPI that was previously allocated
   811	 * @irq: linux irq number to be destroyed
   812	 *
   813	 * Return an IPI allocated with irq_reserve_ipi() to the system.
   814	 */
   815	void irq_destroy_ipi(unsigned int irq)
   816	{
   817		struct irq_data *data = irq_get_irq_data(irq);
   818		struct irq_domain *domain;
   819	
   820		if (!irq || !data)
   821			return;
   822	
   823		domain = data->domain;
   824		if (WARN_ON(domain == NULL))
   825			return;
   826	
   827		if (!irq_domain_is_ipi(domain)) {
   828			pr_warn("Not an IPI domain!\n");
   829			return;
   830		}
   831	
 > 832		irq_domain_free_irqs(irq,
   833			bitmap_weight(data->ipi_mask.cpumask, data->ipi_mask.nbits));
   834	}
   835	

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