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SubjectRe: [patch 07/16] genirq: Introduce helper irq_domain_set_info() to reduce duplicated code
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On Wed, 2014-11-12 at 13:43 +0000, Thomas Gleixner wrote:
> plain text document attachment
> (rfc-part4-v1-02-17-genirq-introduce-helper-irq_domain_set_info-to-reduce-duplicated-code.patch)
> From: Jiang Liu <jiang.liu@linux.intel.com>
>
> Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
> Cc: Bjorn Helgaas <bhelgaas@google.com>
> Cc: Grant Likely <grant.likely@linaro.org>
> Cc: Marc Zyngier <marc.zyngier@arm.com>
> Cc: Yingjoe Chen <yingjoe.chen@mediatek.com>
> Cc: Yijing Wang <wangyijing@huawei.com>
> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
> ---
> include/linux/irqdomain.h | 5 +++++
> kernel/irq/irqdomain.c | 10 ++++++++++
> 2 files changed, 15 insertions(+)
>
> Index: tip/include/linux/irqdomain.h
> ===================================================================
> --- tip.orig/include/linux/irqdomain.h
> +++ tip/include/linux/irqdomain.h
> @@ -33,6 +33,7 @@
> #define _LINUX_IRQDOMAIN_H
>
> #include <linux/types.h>
> +#include <linux/irqhandler.h>
> #include <linux/radix-tree.h>
>
> struct device_node;
> @@ -263,6 +264,10 @@ extern int irq_domain_set_hwirq_and_chip
> irq_hw_number_t hwirq,
> struct irq_chip *chip,
> void *chip_data);
> +extern void irq_domain_set_info(struct irq_domain *domain, unsigned int virq,
> + irq_hw_number_t hwirq, struct irq_chip *chip,
> + void *chip_data, irq_flow_handler_t handler,
> + void *handler_data, const char *handler_name);
> extern void irq_domain_reset_irq_data(struct irq_data *irq_data);
> extern void irq_domain_free_irqs_common(struct irq_domain *domain,
> int virq, int nr_irqs);
> Index: tip/kernel/irq/irqdomain.c
> ===================================================================
> --- tip.orig/kernel/irq/irqdomain.c
> +++ tip/kernel/irq/irqdomain.c
> @@ -882,6 +882,16 @@ int irq_domain_set_hwirq_and_chip(struct
> return 0;
> }
>
> +void irq_domain_set_info(struct irq_domain *domain, unsigned int virq,
> + irq_hw_number_t hwirq, struct irq_chip *chip,
> + void *chip_data, irq_flow_handler_t handler,
> + void *handler_data, const char *handler_name)
> +{
> + irq_domain_set_hwirq_and_chip(domain, virq, hwirq, chip, chip_data);
> + __irq_set_handler(virq, handler, 0, handler_name);
> + irq_set_handler_data(virq, handler_data);
> +}
> +

Hi,

While trying to use this function, I'm not sure about its interface.
This function have 8 parameters but only save 3 function calls. After
checking uses in Jiang's original patch, I think this make code harder
to understand.

Joe.C



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