linux-kernel - Re: [RFC v1 15/25] genirq: Kill the first parameter 'irq' of irq_flow_handler

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Date:	Wed, 20 May 2015 23:32:57 +0800
From:	Jiang Liu <jiang.liu@...ux.intel.com>
To:	Thomas Gleixner <tglx@...utronix.de>
CC:	Bjorn Helgaas <bhelgaas@...gle.com>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Randy Dunlap <rdunlap@...radead.org>,
	Yinghai Lu <yinghai@...nel.org>,
	Borislav Petkov <bp@...en8.de>,
	Russell King <linux@....linux.org.uk>,
	Jason Cooper <jason@...edaemon.net>,
	Andrew Lunn <andrew@...n.ch>,
	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
	Gregory Clement <gregory.clement@...e-electrons.com>,
	Hans Ulli Kroll <ulli.kroll@...glemail.com>,
	Shawn Guo <shawn.guo@...aro.org>,
	Sascha Hauer <kernel@...gutronix.de>,
	Roland Stigge <stigge@...com.de>,
	Tony Lindgren <tony@...mide.com>,
	Rajendra Nayak <rnayak@...com>, Paul Walmsley <paul@...an.com>,
	Daniel Mack <daniel@...que.org>,
	Haojian Zhuang <haojian.zhuang@...il.com>,
	Robert Jarzmik <robert.jarzmik@...e.fr>,
	Kukjin Kim <kgene@...nel.org>,
	Krzysztof Kozlowski <k.kozlowski@...sung.com>,
	Arnd Bergmann <arnd@...db.de>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Tony Luck <tony.luck@...el.com>, x86@...nel.org,
	linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
	linux-acpi@...r.kernel.org,
	Russell King <rmk+kernel@....linux.org.uk>,
	linux-arm-kernel@...ts.infradead.org, linux-omap@...r.kernel.org,
	linux-samsung-soc@...r.kernel.org
Subject: Re: [RFC v1 15/25] genirq: Kill the first parameter 'irq' of irq_flow_handler_t

On 2015/5/20 23:28, Thomas Gleixner wrote:
> On Wed, 20 May 2015, Jiang Liu wrote:
>> -static void locomo_handler(unsigned int irq, struct irq_desc *desc)
>> +static void locomo_handler(struct irq_desc *desc)
>>  {
>>  	struct locomo *lchip = irq_desc_get_chip_data(desc);
>> +	unsigned int irq;
>>  	int req, i;
> 
> That leaves irq unitialized ....
That should be OK, 'irq' here is just a local variable.
Actually it may be changed as:
        if (req) {
                /* generate the next interrupt(s) */
-                irq = lchip->irq_base;
+                unsigned int irq = lchip->irq_base;
                for (i = 0; i <= 3; i++, irq++) {
                        if (req & (0x0100 << i)) {
                                generic_handle_irq(irq);
                        }

                }
        }

> 
> Thanks,
> 
> 	tglx
> 
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